Strip off the last three characters (the LENGTH( ) function returns the length of a string) : LEFT « String « SQL / MySQL

1. SQL / MySQL
2. String
3. LEFT

Strip off the last three characters (the LENGTH( ) function returns the length of a string)

      
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)

   
    
    
    
    
    
  

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