Re: [PHP] Selecting between using letters
How would I create a select statement in MySQL that would return a range of records from the LastName field where the value starts with a designated letter - for example, returning the range where the first letter of LastName is between A and E... Any help would be greatly appreciated. $sql = SELECT * FROM table WHERE LastName REGEXP '^[A-E]'; HTH -- Lowell Allen -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Selecting between using letters
If the database is really large, some databases will attempt to use an index if you use between as in select * from table where lastname between A and F or and compares. not sure about MySQL, and notice I had to use the letter F to get all names beginning with E I seem to recall Sybase would use a table scan (read every row in the table) if an imbedded function was used in the where clause, and it would use an index with between. Haven't done any internals work with MySQL so not sure if this would speed things up or not. Warren Vail -Original Message- From: Lowell Allen [mailto:[EMAIL PROTECTED] Sent: Monday, December 29, 2003 2:25 PM To: PHP Subject: Re: [PHP] Selecting between using letters How would I create a select statement in MySQL that would return a range of records from the LastName field where the value starts with a designated letter - for example, returning the range where the first letter of LastName is between A and E... Any help would be greatly appreciated. $sql = SELECT * FROM table WHERE LastName REGEXP '^[A-E]'; HTH -- Lowell Allen -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Selecting between using letters
How would I create a select statement in MySQL that would return a range of records from the LastName field where the value starts with a designated letter - for example, returning the range where the first letter of LastName is between A and E... Any help would be greatly appreciated. http://www.phreshdesign.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Selecting between using letters
How about the following; SELECT DISTINCT left( name, 1 ) AS idx, count( * ) FROM users GROUP BY idx produces a count of the names found for each letter, then you can make decisions about your range of letters, like a max of 250 between letters, or some such number. Warren Vail -Original Message- From: Doug Parker [mailto:[EMAIL PROTECTED] Sent: Monday, December 29, 2003 2:18 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: [PHP] Selecting between using letters How would I create a select statement in MySQL that would return a range of records from the LastName field where the value starts with a designated letter - for example, returning the range where the first letter of LastName is between A and E... Any help would be greatly appreciated. http://www.phreshdesign.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Selecting between using letters
Doug Parker wrote: How would I create a select statement in MySQL that would return a range of records from the LastName field where the value starts with a designated letter - for example, returning the range where the first letter of LastName is between A and E... Any help would be greatly appreciated. http://www.phreshdesign.com SELECT * FROM `user` WHERE lastname 'A' AND lastname 'E' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
