The Ultimate Guide to High Availability with MariaDB
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&&

Syntax

AND, &&

Contents

  1. Syntax
  2. Description
  3. Examples

Description

Logical AND. Evaluates to 1 if all operands are non-zero and not NULL, to 0 if one or more operands are 0, otherwise NULL is returned.

For this operator, short-circuit evaluation can be used.

Examples

SELECT 1 && 1;
+--------+
| 1 && 1 |
+--------+
|      1 |
+--------+

SELECT 1 && 0;
+--------+
| 1 && 0 |
+--------+
|      0 |
+--------+

SELECT 1 && NULL;
+-----------+
| 1 && NULL |
+-----------+
|      NULL |
+-----------+

SELECT 0 && NULL;
+-----------+
| 0 && NULL |
+-----------+
|         0 |
+-----------+

SELECT NULL && 0;
+-----------+
| NULL && 0 |
+-----------+
|         0 |
+-----------+
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