WHERE clauses can test multiple conditions.

       
mysql>
mysql> CREATE TABLE mail
    -> (
    ->  t               DATETIME,       # when message was sent
    ->  senderUser      CHAR(8),        # sender (source user and host)
    ->  senderHost      CHAR(20),
    ->  recipientUser   CHAR(8),        # recipient (destination user and host)
    ->  recipientHost   CHAR(20),
    ->  size    BIGINT,         # message size in bytes
    ->  INDEX   (t)
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO mail (t,senderHost,senderUser,recipientHost,recipientUser,size)
    ->  VALUES
    ->          ('2010-05-11 10:15:08','saturn','barb','mars','tricia',58274),
    ->          ('2010-05-12 12:48:13','mars','tricia','venus','gene',194925),
    ->          ('2010-05-12 15:02:49','mars','phil','saturn','phil',1048),
    ->          ('2010-05-13 13:59:18','saturn','barb','venus','tricia',271),
    ->          ('2010-05-14 09:31:37','venus','gene','mars','barb',2291),
    ->          ('2010-05-14 11:52:17','mars','phil','saturn','tricia',5781),
    ->          ('2010-05-14 14:42:21','venus','barb','venus','barb',98151),
    ->          ('2010-05-14 17:03:01','saturn','tricia','venus','phil',2394482),
    ->          ('2010-05-15 07:17:48','mars','gene','saturn','gene',3824),
    ->          ('2010-05-15 08:50:57','venus','phil','venus','phil',978),
    ->          ('2010-05-15 10:25:52','mars','gene','saturn','tricia',998532),
    ->          ('2010-05-15 17:35:31','saturn','gene','mars','gene',3856),
    ->          ('2010-05-16 09:00:28','venus','gene','mars','barb',613),
    ->          ('2010-05-16 23:04:19','venus','phil','venus','barb',10294),
    ->          ('2010-05-17 12:49:23','mars','phil','saturn','tricia',873),
    ->          ('2010-05-19 22:21:51','saturn','gene','venus','gene',23992)
    -> ;
Query OK, 16 rows affected (0.00 sec)
Records: 16  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> SELECT t, senderUser, recipientUser FROM mail
    -> WHERE senderUser = 'gene' OR senderUser = 'barb' OR senderUser = 'phil';
+---------------------+------------+---------------+
| t                   | senderUser | recipientUser |
+---------------------+------------+---------------+
| 2010-05-11 10:15:08 | barb       | tricia        |
| 2010-05-12 15:02:49 | phil       | phil          |
| 2010-05-13 13:59:18 | barb       | tricia        |
| 2010-05-14 09:31:37 | gene       | barb          |
| 2010-05-14 11:52:17 | phil       | tricia        |
| 2010-05-14 14:42:21 | barb       | barb          |
| 2010-05-15 07:17:48 | gene       | gene          |
| 2010-05-15 08:50:57 | phil       | phil          |
| 2010-05-15 10:25:52 | gene       | tricia        |
| 2010-05-15 17:35:31 | gene       | gene          |
| 2010-05-16 09:00:28 | gene       | barb          |
| 2010-05-16 23:04:19 | phil       | barb          |
| 2010-05-17 12:49:23 | phil       | tricia        |
| 2010-05-19 22:21:51 | gene       | gene          |
+---------------------+------------+---------------+
14 rows in set (0.00 sec)

mysql>
mysql> drop table mail;
Query OK, 0 rows affected (0.00 sec)

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WHERE clauses can test multiple conditions. : Where « Where Clause « SQL / MySQL

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