Using Logical OR operator with NULL value : OR « Logic Operator « MySQL Tutorial

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MySQL Tutorial » Logic Operator » OR

8. 4. 2. Using Logical OR operator with NULL value


mysql>

mysql> SELECT 0 || NULL;

+-----------+

| 0 || NULL |

+-----------+

|      NULL |

+-----------+

1 row in set (0.00 sec)



mysql> SELECT 1 || NULL;

+-----------+

| 1 || NULL |

+-----------+

|         1 |

+-----------+

1 row in set (0.02 sec)



mysql> SELECT NULL || NULL;

+--------------+

| NULL || NULL |

+--------------+

|         NULL |

+--------------+

1 row in set (0.00 sec)



mysql>

mysql>

8. 4. OR
	8. 4. 1.	Logical OR (OR( \|\| ))
	8. 4. 2.	Using Logical OR operator with NULL value
	8. 4. 3.	Using OR to link two conditions

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