1.What is the purpose of using DISTINCT on multiple columns in SQL? DISTINCT on multiple columns eliminates rows where all selected fields are identical, ensuring unique combinations of the specified columns in the result set. 2.How does DISTINCT work with multiple columns? When used with multipl...
For defining how to use SQL select distinct multiple columns, we are using the orders table. In addition, we are using the Postgres database to execute queries that define how we are using it. Code: Select * from orders; Output: In the below query, we use two columns with sql select ...
DISTINCT 是SQL 中的一个关键字,用于返回唯一不同的值。当你在 SELECT 语句中使用 DISTINCT 关键字时,MySQL 会从查询结果中删除重复的行,只返回唯一的行。 多列DISTINCT 在MySQL 中,你可以使用 DISTINCT 关键字对多个列进行去重。这意味着查询结果中的每一行在指定的多个列上都必须是唯一的。 语法示例 代码语言...
In SQL, how to I select DISTINCT column over multiple columns?Reply Answers (7) Stock Qty shows as per Material Issue Slip [MIS] MSSQL Server Database About Us Contact Us Privacy Policy Terms Media Kit Sitemap Report a Bug FAQ Partners C# Tutorials Common Interview Questions Stories ...
SQL DISTINCT on Multiple Columns We can also useSELECT DISTINCTwith multiple columns. For example, -- select rows if the first name and country of a customer is uniqueSELECTDISTINCTcountry, first_nameFROMCustomers; Run Code Here, the command selects rows if combinations ofcountryandfirst_nameare...
as the article is aimed at novice users and getting them to start writing SQL. Tuning is a whole other topic and all they need to know is maybe to use distinct with caution and always try with group by as well to see which is faster (as this is the best indicator for a newbie who...
Example - Finding Unique Values in Multiple Columns Next, let's look at how to use the SQL DISTINCT clause to remove duplicates from more than one field in a SELECT statement. Using the samesupplierstable from the previous example, enter the following SQL statement: ...
Does distinct apply to all columns? Yes,DISTINCT works on all combinations of column values for all columnsin the SELECT clause. Can I use distinct with multiple columns in SQL? Answer.Yes, the DISTINCT clause can be applied to any valid SELECT query. It is important to note that DISTINCT...
SELECTDISTINCTcolumn_1FROMtable_name;Code language:SQL (Structured Query Language)(sql) In this statement, theDISTINCToperator compares values in thecolumn_1of thetableto determine the duplicates. To retrieve unique data based on multiple columns, you need to specify the column list in theSELECTcla...
To select all distinct stores in Table Store_Information, we key in,SELECT DISTINCT Store_Name FROM Store_Information;Result: Store_Name Los Angeles San Diego BostonExample 2: Use DISTINCT on multiple columnsWe can apply DISTINCT to multiple columns. If we want to get a list showing all ...