Mega Code Archive
Determining the Length of a Character String
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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>
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