The query to create a table is as follows mysql> create table selectDistinctDemo -> ( -> InstructorId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentId int, -> TechnicalSubject varchar(100) -> ); Query OK, 0 rows affected (0.50 sec) With the following VBA code, you can also extract the unique values from multiple columns. SELECT DISTINCT on one column, with multiple columns returned. Click Insert > Module, and paste the following code in the Module Window. Answer. In case a column contains multiple NULL values, DISTINCT will keep only one NULL in the result set. The DISTINCT keyword applies to the entire result set, so adding DISTINCT to your query with multiple columns will find unique results. It means that the query will use the combination of values in all columns to evaluate the distinction. The query uses the combination of values in all specified columns in the SELECT list to evaluate the uniqueness.. Active 3 years, 7 months ago. 2. Data is both numeric and categorical (string). A table may contain many duplicate data and to get an accurate result on your application. The DISTINCT keyword is applied to all columns. How to create a select query with multiple columns querying a single column with multiple conditions 0 How to select rows where the value in one column doesn't have any duplicates (i.e DISTINCT) AND the value in a different column does, IN SQL? In other words, the DISTINCT clause treats all NULL “values” as the same value.. SQL Server SELECT DISTINCT examples 1. Example. If you want to select distinct values of some columns in the select list, you should use the GROUP BY clause.. Learn how to use SQL SELECT DISTINCT statement with this tutorial. I'm trying to convert each distinct value in each column of my RDD, but the code below is very slow. Supposing we have a table with four columns (a,b,c,d) of the same data type. If you apply the DISTINCT clause to a column that has NULL, the DISTINCT clause will keep only one NULL and eliminates the other. Specifically, I want to replicate the following SQL query into PowerBI to create a new table: SELECT DISTINCT Col1, Col2, Col3 FROM TableA; I can find the DISTINCT keyword, but it only supports one column. Is there a way to get distinct values for multiple columns? Viewed 83k times 23. Is there any alternative? Can we apply DISTINCT to a SELECT query with multiple columns?. Yes, the DISTINCT clause can be applied to any valid SELECT query. You can use DISTINCT on multiple columns. SELECT DISTINCT col1,col2,col3,col4 from table This doesn't work, because DISTINCT here applies to all columns so columns as a whole are distinct. Select unique data from the columns of a table using the SQL SELECT DISTINCT statement.. You just need to specify the column name which contains many same data and you want to fetch only the unique data. I am writing a messageboard/forum and have a database with these columns: PostSubject ThreadID PostID (unique identifier) Multiple messageboard posts can have the same ThreadID, such as replies to a post. Ask Question Asked 5 years, 5 months ago. Hold down the ALT + F11 keys, and it opens the Microsoft Visual Basic for Applications window. SQL DISTINCT on Multiple Columns. But I want a single column to have distinct … SELECT DISTINCT last_name, active FROM customer; To understand the MySQL select statement DISTINCT for multiple columns, let us see an example and create a table. Question. 5. SELECT DISTINCT ON MULTIPLE COLUMNS, SPECIFY COLUMNS TO BE RETAINED Posted 02-10-2015 12:19 PM (54813 views) 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. Sep 14, 2009 01:01 AM | invervegas | LINK. 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