List elements are compared by reference, see ?distinct for details. I have a DataTable that has several hundred rows. I would like to count the number of unique server names in a give range. Data Wrangling with dplyr and tidyr Order rows by values of a column (high to low). However you may be trying to answer how many unique products were sold in a country, or how many unique. Home » Articles » 11g » Here. plot(x, y) Values of x against y. The values in cloc's 'scale' and '3rd gen. • WINDOWS 95 The rubber meets the road as we test Windows 95. But that's a bit long, and by far not the only, way to extract unique values in Excel. I found a VBA custom Function that words for one Column but I can't get it to work for 3 Columns. This is necessary so as to maintain the same primitive data type for members in the same vector. If I have a column with values, and I want to find out what distinct values are in there (not how many - but the actual distinct values), how can I do that? In SQL Server I would do something like. I am ok up to this point i get the count i am looking for. The following picture shows you 4 values in column B. For a vector, an object of the same type of x, but with only one copy of each duplicated element. Apart from the basic Excel count unique values formula, you will learn formulas for counting unique names, texts, numbers, cased-sensitive unique values, and more. Note that there are no parentheses needed after the function name. There are several ways to count unique values among duplicates. A "factor" is a vector whose elements can take on one of a specific set of values. When working with a SAS OLAP cube, both in analyzing cube design or for debugging a memory-related issue, you often need to determine what the distinct counts are for categorical columns in the input table that will be used as levels within cube di. You can place any R expression in j; e. =ROWS(B1:B45) Count the number of unique values by using functions. () or an anonymous code block wrapped with braces. convert() with asis = TRUE will be run on each of the new columns. 20 Dec 2017. Computes a pair-wise frequency table of the given columns. This reference guide is a work in progress. Count the number of unique values in a list column by using Advanced Filter Use the Advanced Filter dialog box to find the unique values in a column of data. e for A, B & C), but I am getting 5 (bcoz of A, A, B, C, C). This blog is the result of a dearth of detail. The default value is a regular expression that matches any sequence of non-alphanumeric values. Dplyr package in R is provided with distinct() function which eliminate duplicates rows with single variable or with multiple variable. Returns the sorted unique elements of an array. For this, you need to use a method which will count a value only one time and ignore it's all the other occurrences in the list. Lets say I have two columns where the observations starts on row 2 :. R to python data wrangling snippets. The close solution I found is the second one proposed in article below: How to count number of distinct values in a range? I'm essentially after finding out how many values are unique in Column A while Column B correspond to a certain value. Source: How To Return Multiple Match Values in Excel Using INDEX-MATCH or VLOOKUP […] Drop-Down Help - […] Source: How To Return Multiple Match Values in Excel Using INDEX-MATCH or VLOOKUP […] Lookup return multiple values for a list - […] fruit and veg columns it needs to return all that had 50. Count unique values in each column Hi, Is it possible to have a macro count the number of unique entries (excluding blanks) in each column of an Excel database and then enter each of the values (the unique counts) two cells above each column?. Calculates the number of rows in the result set that have a nonnull value for the item. left_join() : This return all rows from x, and all columns from x and y. table, after group by by multiple columns in dataframe using R and do aggregate function is based on some. duplicated() determines which elements of a vector or data frame are duplicates of elements with smaller subscripts, and returns a logical vector indicating which elements (rows) are duplicates. Tom, Are Function-based Indexes materialized on commit or when a select is issue against it? I created a function-based index which needs to do quite a bit of work on only a 2000 row table. COUNT() function and SELECT with DISTINCT on multiple columns. So with the join you would want when r. The first question basically boils down to "Count of unique ID's by Circle which went faulty more than twice. Usage count(df, vars = NULL, wt_var = NULL) Arguments df data frame to be processed vars variables to count unique values of wt_var optional variable to weight by - if this is non-NULL, count will sum up the value of this variable for each combination of id variables. My database has 50+ columns and short of creating 50+ summarize by statements, wondering if there is a shortcut. This function is similar to DISTINCT function, but VALUES function can also return Unknown member. The number of distinct values for each column should be less than 1e4. If an array of objects is provided, then public properties can be directly pulled. I am only interested in seeing the rows for all the emp_no that shows more than once. Note that keys are preserved. convert() with asis = TRUE will be run on each of the new columns. If you have an Excel spreadsheet and want to get distinct values from a column, just copy and paste the column of data from your Excel sheet into the textbox below. Adds distinct processing to the Count function. This is useful if the value column was a mix of variables that was coerced to a string. $\endgroup$ – ultron Nov 18 '16 at 15:02. There are three optional outputs in addition to the unique elements: the indices of the input array that give the unique values. When it's read in, the factor columns have a level "", which shouldn't be part of. Count unique values based on two given dates. I wish to count the number of unique values in that range using VBA. Value "AA" has a duplicate in cell B5. However you may be trying to answer how many unique products were sold in a country, or how many unique. This can be accomplished by: Check out the example below to walk through the code samples and final solution to roll-up multiple rows into a single row. The steps to add Line from Column Values include: Right click on the visualization, select Properties; Go to the Lines & Curves menu, click the Add drop down and select Line from Column Values; In Data table with line values: Select the data table the line should be added from. Get the unique values (rows) of the dataframe in python pandas. I have a data frame with two columns with each column has a list of SNPs in more than 1000 rows but not the same number of row. Elements in list columns are compared by reference. If you identify and count them one by one, it will waste a lot of times. If TRUE, type. With the following VBA code, you can also extract the unique values from multiple columns. Based on the names on Column A, and need to have a SUM from the amounts but only distinct values, and only one SUM per name, not duplicate names. Count unique values based on one criteria. Formula in B3:. [code] df[!duplicated(df[,c('x1', 'x2')]),] [/code]. This post explains that how to get the unique values from a range or column in excel. Formula in B3:. The values for the column Item_Name are coming from a different table via VLOOKUP. Special thanks to Bob Haffner for pointing out a better way of doing it. Count Unique Values Using VBA in Microsoft Excel 2010. drop_duplicates() function is used to get the unique values (rows) of the dataframe in python pandas. I am looking to find a formula that Counts the number of unique articles that have been submitted (without having to manually create extra columns for doing CONCATS, if possible). This formula will work with any number of duplicated values. This can be accomplished by: Check out the example below to walk through the code samples and final solution to roll-up multiple rows into a single row. Let us get started with an example from a real world data set. From the Home tab, select Paste. However you may be trying to answer how many unique products were sold in a country, or how many unique. How can I count distinct columns inside a group? 0. If TRUE, keep all variables in. when values of the variables are repeated). If we try the unique function on the 'country' column from the dataframe, the result will be a big numpy array. Instead, use WHERE IS NULL or WHERE IS NOT NULL. Special thanks to Bob Haffner for pointing out a better way of doing it. I am attaching a sample. RowLiner add-in allows you have Excel automatically draw row and/or column lines around the active cell, making it easier to view rows and columns, especially when gridlines are not visible. Home » Articles » Misc » Here. In Step 2 of 3, uncheck any existing Delimiters selection, and select the ‘Other’ option. and am trying to count the number of a specific value (i. Table: Employees. There are several ways to count unique values among duplicates. > sample name sex count 1 Maria f 97 2 Thomas m 12 3 Maria m 5 4 Maria f 97 5 Thomas m 8 6 Maria m 4 I want to sum up the counts grouped by name and sex to finally get this data. This article shows how to use the new PIVOT and UNPIVOT operators in 11g, as well as giving a pre-11g solution to the same problems. For a data frame, a data frame is returned with the same columns but possibly fewer rows (and with row names from the first occurrences of the unique rows). To use a formula to sum values in Column B based on Column A, you can create a formula based on the SUMIF function. This is especially useful when it does not matter which value of the variables you want to keep in the final data set (e. The advantage with the macro includes,. Adding the two values in columns F and G together produces a series of unique numbers that can be used as a ranking. Normal Pivot Tables. example: inmate_id visit_no A 1 B 1 A 2 C 1 A 3 B 2 so that it shows this was the 1st visit, this was the. Count the number of unique values by using a filter You can use the Advanced Filter dialog box to extract the unique values from a column of data and paste them to a new location. Must work with a range including blank cells. Although you can work with the data frame as is, some variables could be converted to a factor because they have a limited amount of values. Get the unique values (rows) of the dataframe in python pandas. Also see the ggplot2 library. tidyr’s separate function is the best. Often we need to count only unique values in excel by ignoring all the duplicate appearances. R – Sorting a data frame by the contents of a column February 12, 2010 i82much Leave a comment Go to comments Let’s examine how to sort the contents of a data frame by the value of a column. You will get a list of the unique values along with the count of occurrences for each value. How to get unique values in column; How to get distinct values in Excel (unique + 1 st duplicate occurrences). This post demonstrates how to build an array formula that counts unique distinct values based on criteria. The specified column names must be valid SAS names. Usually, we work with data and that data includes multiple values repeating at the same time. Get the free workbook to follow along If you're using a pivot table to summarize your data, you might have questions such as: How many unique (distinct) customers made purchases in. Step 5: Implement pivot table to count the unique values as you wanted. I want to calculate the average age of the individual employees. How can I count distinct columns inside a group? 0. Select distincts are in may ways like a group by without any aggregate functions. This option narrows the scope of the search and usually returns fewer rows than searching for a single value. After filtering data in column A, one may want to extract the unique numbers from column B to cell A18 (and then downwards). How to use numeric indices in R. In addition, you can move rows to columns or columns to rows ("pivoting") to see a count of how many times a value occurs in a PivotTable. I was recently trying to group a data frame by two columns and then sort by the count using dplyr but it wasn't sorting in the way I expecting which was initially very confusing. Count with group by: count for a group value. Count unique values based on one criteria. In the blank worksheet, click cell A1. For example, d below has one blank row. Extracing only Unique Rows based on only 1 Column. The advantages in the tabular model with the distinct count are: You do not need to create, process and maintain separate partitions and measures for the distinct count as you do in multidimensional models. All I know how to do is average the age column, but the obviously counts Employee 1 and 4's ages twice, giving me an average age of 41. I wish to count the number of unique values in that range using VBA. "Flag" Unique Values with Multiple Criteria I am trying to create a formula that will "flag" a single, unique combination of column A and column B. If the span attribute is set to N > 0, the current COLGROUP element defines a column group containing N columns. You can do it much faster by using a special formula, and in a moment I will show you this and a couple of other techniques. But that's a bit long, and by far not the only, way to extract unique values in Excel. The server names appear multiple times in this column. There is a three column database with month in column A, numbers in column B and names in column C. In addition, you can move rows to columns or columns to rows ("pivoting") to see a count of how many times a value occurs in a PivotTable. ALL returns the number of non NULL values. How can I extract unique combinations of row values from that dataframe?. I have a dataframe df with two columns x and y. The values for the column Item_Name are coming from a different table via VLOOKUP. Finding and removing duplicate records Problem. 0 Description A consistent, simple and easy to use set of. Easily calculate mean, median, sum or any of the other built-in functions in R across any number of groups. In some rare cases, mostly on very large workbooks, the above shortcuts may select both visible and invisible cells. If you use a column name as an argument to COUNT, the result is the total number of rows in a group or in a table that have a nonmissing value for that column. The only difference is in calculating the smaller value. Multiple versions written by the same person do not count as unique, but articles with the same title written by different people do count as unique. Here's the best approach I can think of. But that's a bit long, and by far not the only, way to extract unique values in Excel. Removing duplicate observations. The General Waste Stream code (column A) is left blank on all continuation rows. Count Unique Values based on two columns I have the following data values as an example: Column A is "Level" with Numbers and Column B is "Dog Breeds". If a grouping column contains more than one null, the nulls are put into a single group. tolist()) 142. In order for protected or private properties to be pulled, the class must implement both the __get() and __isset() magic. The application of microbore columns (1 mm internal diameter) offers a significant sensitivity advantage over tradition analytical columns (4. This is a very important SQL statement because it demonstrates the nesting of BIFs and the use of decode for counting values. Like in this case, it should give me the answer 3 (i. id) from @t t group by id go. Count with group by: count for a group value. Build the PivotTable by placing the column that contains data range ‘Values’ and in the ‘Rows’ quadrant as shown below. Vlookup Multiple Values – The Array Formula to Look Up Data June 16, 2014 by Brigitta Schwulst Vlookup allows you to search data for a value and return a corresponding value from the sale row. Usage count(df, vars = NULL, wt_var = NULL) Arguments df data frame to be processed vars variables to count unique values of wt_var optional variable to weight by - if this is non-NULL, count will sum up the value of this variable for each combination of id variables. mydata[ , 1:8] Or let's say you only one the 4th, 6th and 8th columns mydata[ , c(4,6,8)] and so on. Count number of specific values in matrix. php) [Bug 4326] ! Custom field value was not set for required on registration check, when it was not a text field. The corresponding column will be filled with its default value. one row per subject; multiple observations/column per subject) and "long" format (one observation per row). The value_counts() function looks at a single column of data at a time and counts how many instances of each unique entry that column contains. Join (merge) Tables (lists) - by columns match in Excel Join is to combine two tables by matching the values in corresponding columns. Now I want a seperate column which will count the distinct values for that column. Multiple rows having the same key columns null and the rest filled with non-null values are allowed, provided the values differ in at least one column Multiple rows having the same key columns null and the rest filled with non-null values that are the same in every column will violate the constraint. Aggregate always returns a data. In the blank cell below the last cell in the range, enter the ROWS function. My data is specifically one column with a year, one with a month, and one with a day. For example, I have a DataTable of Product Orders, but I want to get the number of unique Customers. How to extract unique values from a list or excel range in excel 2013. Count unique values based on criteria without using array October 11th, 2014, 04:04 I have a large worksheet with multiple columns of arrays which slow everything down and I'd like to replace each of them with a helper column and another formula which would hopefully speed things up. COLUMNS Statement. autoMapping. Summary: in this tutorial, we will show you how to use the PostgreSQL ADD COLUMN statement to add one or more columns to an existing database table. reader(open('data. So, the best that we can do with COUNTIF is to get a count of East region orders. How to count unique values in subgroups? WHY is the name of the column not Var1 and colour you don't specify Var1 as the variable to look at for unique values. I'm using countifs to filter multiple criteria ( 5 columns) to get my results. After filtering data in column A, one may want to extract the unique numbers from column B to cell A18 (and then downwards). This is just a pandas programming note that explains how to plot in a fast way different categories contained in a groupby on multiple columns, generating a two level MultiIndex. All you need to do, is start from "Step 3". csv', 'rb'), delimiter=' ') I'm getting a list of lists. Data is summarized at the last specified group. I was using this code, but I can't rely on it because my binding source is filtered from time to time. So with the join you would want when r. 1 mm internal diameter) as the peaks eluting from the column are contained within a smaller volume, assuming the same chromatographic performance, and are thus more concentrated for a given sample load. Value "AA" has a duplicate in cell B5. Unique values would be a distinct list. It is often necessary to eliminate duplication, for correct data analysis and data integration purposes. , a whole dataframe. For example x<-. I have two worksheets in a workbook. A query (SELECT statement) that supplies the rows to be inserted. He notes that you would need to create a temporary create a table with just those values (and a column for the count) and modify the code to select sts_id from the new table, and update the new table with the count:. You want to find and/or remove duplicate entries from a vector or data frame. Values mean the following: In the absence of a span attribute, each COLGROUP defines a column group containing one column. Recode from car can be very powerful and is a good alternative to the code above. Count Unique Values based on two columns I have the following data values as an example: Column A is "Level" with Numbers and Column B is "Dog Breeds". table R tutorial explains the basics of the DT[i, j, by] command which is core to the data. Count unique values in each column Hi, Is it possible to have a macro count the number of unique entries (excluding blanks) in each column of an Excel database and then enter each of the values (the unique counts) two cells above each column?. "paste" in Unix) diff(x) # Returns. The General Waste Stream code (column A) is left blank on all continuation rows. Stacked column charts also support 100% stacking, where the stacks of elements at each domain-value are rescaled such that they add up to 100%. You can use as many COLUMNS statements as you need. For this, you need to use a method which will count a value only one time and ignore it's all the other occurrences in the list. If you have been doing SQL development for a while, you probably have come across this common scenario in your everyday job - Retrieving a single record from a table when there are multiple records exist for the same entity such as customer. Limitations. Value "AA" has a duplicate in cell B5. [code] df[!duplicated(df[,c('x1', 'x2')]),] [/code]. Details Speed-wise count is competitive with table for single variables, but it really comes into its own when summarising multiple dimensions because it only counts combinations that actually occur in the data. i want to select the distinct values from the datatable & display into the grid thanks for the replay ,what about another columns, its only distinct the batch column. In addition, you can move rows to columns or columns to rows ("pivoting") to see a count of how many times a value occurs in a PivotTable. I have an excel spread sheet that contains a list of server names in column B. See 'help Conventions' for common values of abbreviations. The sql parameter for type: count_distinct measures can take any valid SQL expression that results in a table column, LookML dimension, or combination of LookML dimensions. Extract unique values from a column. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values. More on the psych package. Finding and removing duplicate records Problem. The close solution I found is the second one proposed in article below: How to count number of distinct values in a range? I'm essentially after finding out how many values are unique in Column A while Column B correspond to a certain value. convert() with asis = TRUE will be run on each of the new columns. The first column contains a 4, the second column contains a 3, and the third column contains a 2:. Table: Employees. I wish to count the number of unique values in that range using VBA. It is always important to have a count vis-a-vis EDA of the number of records for each value or level of a categorial variable under consideration. values = csv. count unique values of multiple columns in R. For files not opened in universal newlines read mode the value of this attribute will be None. This is because for a given row's calculation, AllPrevious is not using all unique values from the Season column - only values that are less than or equal to the current season. distinct() considers 1 , [1] , and 1 as separate values. , if columns are selected more than once, or if more than one column of a given name is selected if the data frame. If we try the unique function on the 'country' column from the dataframe, the result will be a big numpy array. For example, d below has one blank row. With a single vector. select group_key, COUNT( DISTINCT DUMP(VAL) ) count_distinct_val_1 , COUNT( DISTINCT VAL ) + MAX( NVL2(VAL,0,1) ) count_distinct_val_2 from t1 group by group_key order by group_key ;. Nope, but I googled "Count unique values in R" found nothing helpful and now this page is number 4 in my results, and hopefully will help others as well, without just telling them to read a book to find this one answer. This is a simple question : I want to create a table selecting distinct observations from an existing table based on combination of three columns but I want to retain some more variables from the original table. Also, why not check out some of the graphs and plots shown in the R gallery, with the accompanying R source code used to create them. These unique values will form the column names of the new columns. / Tutorial / Creating and Using a Database / Retrieving Information from a Table / Selecting Particular Columns 3. See examples. Once I get to the point where I’m using LINQ to group by multiple columns, my instinct is to back out of LINQ altogether. For example, you can extract the values in the first two rows and the last two columns with the following code: > first. (1,2,3) is a vector of integers as well as a column in the data frame sense. (DbPackages-mysql. The first entry is the number of rows of images. If the column-name list after table-name is omitted then the number of values inserted into each row must be the same as the number of columns in the table. For mixed data types provided via a DataFrame , the default is to return only an analysis of numeric columns. I would use this query in SQL: SELECT ID1, ID2, Value1, MAX(Value2), MAX(Date1) FROM MyTable i GROUP BY ID1, ID2, Value1. Extract Unique Text Values based on Multiple Criteria Hi, I am new to this forum, having lurked for some time - but have finally hit a wall in which I cannot seem to rely on any old post solving my issues. As you can see only two rows are returned and they are the distinct class in the table Counting number of distinct records SELECT COUNT( DISTINCT class ) FROM student Output is 7 MySQL Count Query. value can have multiple r. I have a dataframe that looks like this: how to get values from selectInput with shiny. More on the psych package. frequency of a variable per column with R. If I have a column with values, and I want to find out what distinct values are in there (not how many - but the actual distinct values), how can I do that? In SQL Server I would do something like. The COUNT(DISTINCT column_name) function returns the number of distinct values of the specified column: SELECT COUNT(DISTINCT column_name) FROM table_name; Note: COUNT(DISTINCT) works with ORACLE and Microsoft SQL Server, but not with Microsoft Access. Three methods, for different versions of Excel. I have to do something in PHP for "cycle" which will generate a table with vertical counting cells. Counting field values in a Database Report using the Count and IIF expressions: If you store values in your database to indicate choices for your uses to make, such as storing values like Yes/No, True/False, Male/Female, Adult/Child, there may be times when you would like to make calculations on this data. Stacked column charts also support 100% stacking, where the stacks of elements at each domain-value are rescaled such that they add up to 100%. One may wan to extract the unique text values from a specific column based on conditions specified by end-user. Pandas' value_counts() easily let you get the frequency counts. If multiple object values have the highest count, then the count and top results will be arbitrarily chosen from among those with the highest count. So I'm working with a query that has ID and medication (multiple records per person) and a table that has demographics (one record per person). A NULL value in a table is a value in a field that appears to be blank which means A field with a NULL value is a field with no value. Within a single worksheet I have thousand-plus rows of data and one of the columns within that worksheet I have a series of numbers. How to Select Rows of Pandas Dataframe Based on Values NOT in a list? We can also select rows based on values of a column that are not in a list or any iterable. However, using the OVER function will divide the data into 2 groups, Group 1 & Group 2, and then SUM the rows in the Value column for each one of those groups. You can group by more than one column as well. I used the for loop like this-> k=test[1,1] cou… Hello, I have a table with 2947 rows and 1 column containing only integer values in the range 1 to 30. SQL functions are divided into two categories, Aggregate Functions; Scalar Functions. All replies. Not needed in formula. Based on the names on Column A, and need to have a SUM from the amounts but only distinct values, and only one SUM per name, not duplicate names. Package ‘stringr’ February 10, 2019 Title Simple, Consistent Wrappers for Common String Operations Version 1. We use a combination of “OFFSET”, “Index”, and “ROW” functions in Microsoft Excel 2010. SELECT DISTINCT returns only distinct (different) values. Now, lets examine the column names (and also note how we see how many there are) using colnames, nrow, ncol, dim:. Finding both count and average of a column in R data. This behavior is kept for compatibility reasons and may change in a future version. On this page, we will present first the basics of how missing values are represented in R. For a data frame, a data frame is returned with the same columns but possibly fewer rows (and with row names from the first occurrences of the unique rows). - gakera Nov 18 '10 at 13:51. Some 618,000 jobs have been filled, with a run-rate that predicts more than 1. However, to those accustomed to working with missing values in other packages, the way in which R handles missing values may require a shift in thinking. table syntax now. count by distinct values from a for the values in multiple columns and get the count??? (and also if the row contains Subcategory and Subcategory1 as "Glam Rock. Currently we only allow dynamic partition columns to be the last column(s) in the partition clause because the partition column order indicates its hierarchical order (meaning dt is the root partition, and country is the child partition). Value Coercion. Similarly, if columns are selected column names will be transformed to be unique if necessary (e. Elements in list columns are compared by reference. You can do it much faster by using a special formula, and in a moment I will show you this and a couple of other techniques. All distinct combinations of values in two columns are shown. This data set was created only to be used as an example, and the numbers were created to match an example from a text book, p. Frequency count of two column in R. There are three optional outputs in addition to the unique elements: the indices of the input array that give the unique values. If TRUE, type. The array formula in cell E3 counts unique distinct items for all dates within the same week. Actually, the. Once we have converted the column to a 0-1 numeric value, we pass the entire clause to the sum function, and add-up the numbers. How to count the ocurrences of each unique values on a Series; How to fill values on missing months; How to filter column elements by multiple elements contained on a list; How to change a Series type? How to apply a function to every item of my Serie? My Pandas Cheatsheet. The purpose is to reduce the volume of data returned when the data volumn already in the database is high. Select File > Add Data Tables. Instead of just counting the number of distinct count values in the entire table using only the DISTINCTCOUNT function, the pattern filters only those values related to events filtered in another table. The 2 items that broken out need t. Normal Pivot Tables. (A UNIQUE index permits multiple NULL values, but you can tell whether the column permits NULL by checking the Null column. At most 1e6 non-zero pair frequencies will be returned. If you want to follow along with the examples below you will need the data that is used. summary (dat). Rename Multiple pandas Dataframe Column Names. The unique values from the selected range are copied to the new column. The NVL2(exp1, exp2, exp3) function checks the first expression exp1, if it is not null then, the second expression exp2 is returned. Way 1: using sapply. In the process, he developed three essential technologies: # a system of globally unique identifiers for resources on the Web and elsewhere, the universal document identifier (UDI), later known as [[uniform resource locator]] (URL) and [[uniform resource identifier]] (URI); # the publishing language [[Hypertext Markup Language|HyperText Markup. I would like to count the number of unique server names in a give range. Count Unique Values across multiple columns within a specific Date Range I'm looking for a way to count unique values using criteria in 3 columns (I need to find the unique values comparing all three columns) as well as only counting values between a specific date range. The COLUMNS statement can be abbreviated COLUMN, COLS, or COL. The following code generates a vector of file names in a directory ( data/) which match a regular expression (ends in. values = csv. By default, when we create a pivot table based on a range of data which contains some duplicate values, all the records will be counted as well, but, sometimes, we just want to count the unique values based on one column to get the right screenshot result. DISTINCT operates on a single column.