Assignment Operator (:=)


var_name := expr


Assignment operator for assigning a value. The value on the right is assigned to the variable on left.

Unlike the = operator, := can always be used to assign a value to a variable.

This operator works with both user-defined variables and local variables.

When assigning the same value to several variables, LAST_VALUE() can be useful.


 SELECT @x := 10;
| @x := 10 |
|       10 |

SELECT @x, @y := @x;
| @x   | @y := @x |
|   10 |       10 |


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