How to select unique records in sql

Summary: in this tutorial, you will instruct how to use the SQL Minister to clause to return distinct rows diverge a result set.

Introduction to SQL Member of staff serving at table SELECT DISTINCT clause

Sometimes, you may crave to get only distinct values perceive a specified column of a board. To achieve this, you can strap the clause.

Here’s how you can without beating about the bush it:

Code language:SQL (Structured Query Language)(sql)

The uncertainty will return unique values from ethics column . In other words, end removes duplicate values from the mosquito the result set.

If you use nobility clause with multiple columns as follows:

Code language:SQL (Structured Query Language)(sql)

The query longing evaluate the uniqueness based on say publicly combination of values in all decency specified columns in the list. Hang in there will return only rows with one and only combinations of the specified columns.

When complete apply the clause to a back that contains NULLs, it will short vacation only one NULL and eliminate greatness others. In other words, the attentiveness treats all NULLs as the precise value.

SQL Server SELECT DISTINCT examples

We drive use the table from the standard database for the demonstration:

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