Mega Code Archive
The bitwise OR operator
<![CDATA[
mysql>
mysql> CREATE TABLE Attributes
-> (
-> UserID SMALLINT NOT NULL PRIMARY KEY,
-> Settings TINYINT UNSIGNED NOT NULL
-> );
Query OK, 0 rows affected (0.01 sec)
mysql> INSERT INTO Attributes VALUES
-> (101, 58),
-> (102, 73),
-> (103, 45);
Query OK, 3 rows affected (0.00 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql>
mysql>
mysql> UPDATE Attributes
-> SET Settings=Settings | 1
-> WHERE UserID=101;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql>
mysql> select * from Attributes;
+--------+----------+
| UserID | Settings |
+--------+----------+
| 101 | 59 |
| 102 | 73 |
| 103 | 45 |
+--------+----------+
3 rows in set (0.00 sec)
mysql>
mysql> drop table Attributes;
Query OK, 0 rows affected (0.00 sec)
mysql>
]]>