Determining the Length of a Character String : CHAR_LENGTH « String « SQL / MySQL

1. SQL / MySQL
2. String
3. CHAR_LENGTH

Determining the Length of a Character String

     
mysql>
mysql>
CHAR_LENGTH(s) returns the number of characters in a character string
mysql>
mysql> CREATE TABLE publishers (
    ->   publID int(11) NOT NULL auto_increment,
    ->   publName varchar(60) collate latin1_german1_ci NOT NULL default '',
    ->   ts timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
    ->   PRIMARY KEY  (publID),
    ->   KEY publName (publName)
    -> ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_german1_ci;
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql>
mysql> INSERT INTO publishers VALUES (1,'A','2004-12-02 18:36:58'),
    ->                                 (2,'Apress','2004-12-02 18:36:58'),
    ->                                 (3,'New Riders','2004-12-02 18:36:58'),
    ->                                 (4,'O\'Reilly & Associates','2004-12-02 18:36:58'),
    ->                                 (5,'Hanser','2004-12-02 18:36:58');
Query OK, 5 rows affected (0.00 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> SELECT CHAR_LENGTH(publName) FROM publishers;
+-----------------------+
| CHAR_LENGTH(publName) |
+-----------------------+
|                     1 |
|                     6 |
|                     6 |
|                    10 |
|                    21 |
+-----------------------+
5 rows in set (0.00 sec)

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

mysql>
mysql>

   
    
    
    
    
  

Related examples in the same category