About the analysis of SQL SELECT DISTINCT statement

SQL SELECT DISTINCT statement plays an important role in database operations, and this article will explain it.

SQL SELECT DISTINCT statement

The table may contain duplicate values. This is not a problem, but sometimes you may want to just list distinct values.

The keyword DISTINCT is used to return uniquely different values.

Syntax:

SELECT DISTINCT column name FROM table name

Use DISTINCT keyword

If you want to select all from the "Company" column value, we need to use the SELECT statement:

SELECT Company FROM Orders

Please note that in the result set, W3School is listed twice.

To select only unique values ​​from the "Company" column, we need to use the SELECT DISTINCT statement:

SELECT DISTINCT Company FROM Orders

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