Select distinct multiple columns sql server


my data looks something like that. +. Learn how to use the ORDER BY clause of the SELECT query to sort your results in alphabetical order, and how to save your SQL SELECT statements. Here they have been rounded to two decimal places, both for simplicity and to reflect the values that are displayed in SQL Server Data Tools (SSDT). In this tutorial, you will learn how to use MySQL DISTINCT clause in the SELECT statement to eliminate duplicate rows in a result set. DISTINCT operates on a single column. It's a good idea to get used to the GROUP BY syntax, as it's more powerful. . DISTINCT for multiple columns is not supported. . I think it would be most efficient if there is a separate index on each of the four columns It SQL-server-2008R2. A very simple query would be to use UNION DISTINCT . SELECT DISTINCT returns only distinct (different) values. Sep 9, 2017 SQL SELECT with DISTINCT on multiple columns: Multiple fields may also be added with DISTINCT clause. Hide Copy Code. So I want all the sales that do not have any other sales that happened on the SELECT DISTINCT field1, field2, field3, . Let's look at how you might use the SQL Server DISTINCT clause to remove duplicates from more than one field in your SELECT Learn to join multiple queries simultaneously into one statement with SQL Server 2008 and 2005 to get a single result set using UNION, INTERSECT and EXCEPT. For your query, I'd do it like this: UPDATE sales SET status='ACTIVE' WHERE id IN ( SELECT id FROM sales S INNER JOIN How do you select multiple columns from a table while ensuring that one specific column doesn't contain duplicate values? I believe you could (SQL Server is not my strongest database skill), but if you can it would be better if you can weed out the row you want using the WHERE clause of the SQL Update: Tested all 5 queries in SQLfiddle with 100K rows (and 2 separate cases, one with few (25) distinct values and another with lots (around 25K values). Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values. For example, if you browse the model by using the Decision Tree viewer and click a node that contains customers grouped by The SQL SELECT DISTINCT Statement. SELECT DISTINCT eliminates duplicate records from the results. DISTINCT can be used with aggregates: COUNT, AVG, MAX, etc. The SELECT DISTINCT statement is used to return only distinct I need to retrieve all rows from a table where 2 columns combined are all different. FROM table I am trying to accomplish the following sql statement but I want it to return all columns is this possible? The objective of this article is to demonstrate different SQL Server T-SQL options that could be utilised in order to transpose repeating rows of data into a single As I understand the question, you want to know whether a null exists in any of the columns values as opposed to actually returning the rows in which either B or C is Example - With Multiple Expressions. is roughly equivalent to: SELECT a,b,c FROM t GROUP BY a,b,c. DISTINCT will eliminate those rows where all the selected fields are identical. id val1 val2 val3 1 33 m k 2 34 j v 4 47 I do not know exactly what your requirement is, but I must say, I have come across a need for counting rows with distinct values on a single column, but I have not yet come across the need for counting rows with distinct values on "multiple columnSQL SELECT DISTINCT Statement. id val1 val2 val3 1 33 m k 1 32 m k 2 34 j v 4 47 h l the result should be. The SELECT DISTINCT statement is used to return only distinct (different) values. I have a query which returns about 20 columns , but i need it to be distinct only by one column. SELECT DISTINCT a,b,c FROM t