RE: Removing Entries From a MySQL Table
Hello; DELETE FROM table_name WHERE 1 ; This command will remove all rows from the table. For more information, see: http://dev.mysql.com/doc/mysql/en/DELETE.html Make sure you have a backup if you think you may need the data in the future. -Tom -Original Message- From: Michael Mason [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 20, 2004 2:47 PM To: 'MySQL Mailing List' Subject: Removing Entries From a MySQL Table I've been looking through the manual and searching the web for the command and syntax used to do the above. I basically just want to clear a table I use for logon entries. Can anyone help with this please.? Michael Mason Business Support Services ArrasR People Tel: 01706 342310 Mobile: 07793 782287 Fax: 01706 642754 Member of the Recruitment Employment Confederation (00052055) The views expressed in this mail are entirely those of the sender, and do not necessarily represent the views or position of Arras Services Ltd. The information contained in this communication is confidential and may be legally privileged. It is intended solely for the use of the individual or entity to whom it is addressed and others authorised to receive it. If you are not the intended recipient you are hereby notified that any disclosure, copying, distribution or taking any action in relation to the contents of this information is strictly prohibited and may be unlawful. Neither the sender nor the represented institution is liable for the correct and complete transmission of the contents of this e-mail, or for its timely receipt. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: NULL problem
Try SELECT * FROM table ORDER BY col LIMIT 23 ; If the col type is numeric, trying to match the string NULL might be the problem. And, if it is numeric, the NULL values will be listed first in 'ORDER BY col'. This doesn't really solve the problem of not being able to select 'where col is null', but should at least be of some use. Hope that helps, -Tom -Original Message- From: Deepak Vishwanathan [mailto:[EMAIL PROTECTED] Sent: Monday, July 19, 2004 11:14 AM To: [EMAIL PROTECTED] Subject: NULL problem Hi, I have a table with a column that has the Unique key constraint on it. In the table definition that column has a default NULL specification too. So, when I ran the query select * from table where col is NULL; I get only 1 row returned, when I have 23 such rows with NULL values. This might be because of the Unique Key constraint. Is there a query that will return all those 23 rows. Thanks, Deepak -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
