mysql>
mysql> CREATE TABLE mytable
-> (
-> name VARCHAR(20)
-> );
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO mytable (name)
-> VALUES
-> ('copper'),
-> ('gold'),
-> ('iron'),
-> ('lead'),
-> ('mercury'),
-> ('platinum'),
-> ('silver'),
-> ('tin')
-> ;
Query OK, 8 rows affected (0.00 sec)
Records: 8 Duplicates: 0 Warnings: 0
mysql>
mysql> SELECT * FROM mytable;
+----------+
| name |
+----------+
| copper |
| gold |
| iron |
| lead |
| mercury |
| platinum |
| silver |
| tin |
+----------+
8 rows in set (0.00 sec)
mysql>
mysql>
mysql> UPDATE mytable SET name = LEFT(name,LENGTH(name)-3);
Query OK, 8 rows affected (0.00 sec)
Rows matched: 8 Changed: 8 Warnings: 0
mysql>
mysql> SELECT name FROM mytable;
+-------+
| name |
+-------+
| cop |
| g |
| i |
| l |
| merc |
| plati |
| sil |
| |
+-------+
8 rows in set (0.00 sec)
mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)