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Option 1: SELECT DISTINCT. This is the most simple and straight forward, but also the most limited way: SELECT DISTINCT word, num FROM dupes ORDER BY word, num; /* word|num| ----|---| aaa |100| bbb |200| bbb |400| ccc |300| ddd |400| */ Option 2: GROUP BY. Grouping allows you to add aggregated data, like the min(id), max(id), count(*), etc:
By using the DISTINCT keyword in a function called COUNT, we can return the number of different countries. Example SELECT COUNT(DISTINCT Country) FROM Customers;
PostgreSQL has a special non-standard DISTINCT ON operator that can also be used. The optional ORDER BY is for selecting which row from every group should be selected: SELECT DISTINCT ON (key) key, value FROM tableX -- ORDER BY key, <some_other_expressions> ;
23 lut 2023 · As its name implies, the DISTINCT keyword is commonly used in a SQL SELECT statement to return a distinct set of values. This tip will look at several simple examples of using SELECT DISTINCT that you can copy, paste, and edit for your needs.
5 kwi 2021 · In this article we look at how to retrieve a list of distinct datasets from SQL Server without repeating information using the DISTINCT clause.
The SELECT DISTINCT statement is used to retrieve unique values of a column or combination of one or more columns. Syntax: SELECT DISTINCT column_name1, column_name2,...
The SQL DISTINCT keyword lets you find unique rows. In this article, you’ll learn how to use it, what it can do, and understand several different examples.
