Oracle DISTINCT Clause

Oracle DISTINCT clause is used to remove the duplicate records from the result set. It is only used with SELECT statement.

Syntax:

Parameters:

expressions:It specifies the columns that you want to retrieve.

tables: It specifies the table from where you want to retrieve records.

conditions: It specifies the conditions that must be fulfilled.

Oracle DISTINCT Example: (with single expression)

Let's take a table "customers"

Customer table:

Execute this query:

Output:

Oracle DISTINCT Example: (with multiple expressions)

Execute this query:

Output:

This example specifies distinct name, age and salary of the customer where age is greater than or equal to 65.