Re: How to delete all rows....
mos wrote: At 08:41 PM 9/25/2006, you wrote: Dilipkumar wrote: Hi, Its delete * from table will only do if you go for a truncate it will recreate the table structure ? It's better to use delete. Can you explain why? I'd go for instant truncate rather than waiting around for delete to finish. The drawback of truncate is it requires a table lock and if people are updating the table, the truncate will have to wait for the locks to complete. So will a delete from table when it's myisam. There is also RI to worry about. Good point. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
Dilipkumar wrote: Hi, Its delete * from table will only do if you go for a truncate it will recreate the table structure ? It's better to use delete. Can you explain why? I'd go for instant truncate rather than waiting around for delete to finish. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
At 08:41 PM 9/25/2006, you wrote: Dilipkumar wrote: Hi, Its delete * from table will only do if you go for a truncate it will recreate the table structure ? It's better to use delete. Can you explain why? I'd go for instant truncate rather than waiting around for delete to finish. The drawback of truncate is it requires a table lock and if people are updating the table, the truncate will have to wait for the locks to complete. There is also RI to worry about. Mike -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
Hi, Its delete * from table will only do if you go for a truncate it will recreate the table structure ? It's better to use delete. Thanks Regards Dilipkumar - Original Message - From: Peter Lauri [EMAIL PROTECTED] To: [EMAIL PROTECTED]; mysql@lists.mysql.com Sent: Wednesday, September 20, 2006 1:25 PM Subject: RE: How to delete all rows DELETE FROM table -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 10:35 AM To: mysql@lists.mysql.com Subject: How to delete all rows Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] ** DISCLAIMER ** Information contained and transmitted by this E-MAIL is proprietary to Sify Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail notify us immediately at [EMAIL PROTECTED] Watch the latest updates on Mumbai, with video coverage of news, events, Bollywood, live darshan from Siddhivinayak temple and more, only on www.mumbailive.in Watch the hottest videos from Bollywood, Fashion, News and more only on www.sifymax.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
If its one time .. i will suggest to take a mysqldump of table structure only and drop the database import the backup . [EMAIL PROTECTED] wrote: Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: How to delete all rows....
DELETE FROM table -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 10:35 AM To: mysql@lists.mysql.com Subject: How to delete all rows Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
You might also look at TRUNCATE table... http://dev.mysql.com/doc/refman/5.0/en/truncate.html I believe that DELETE will not reclaim the storage space while TRUNCATE does, although I didn't see that in the documentation when I looked just now... ? Douglas Sims [EMAIL PROTECTED] On Sep 20, 2006, at 2:55 AM, Peter Lauri wrote: DELETE FROM table -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 10:35 AM To: mysql@lists.mysql.com Subject: How to delete all rows Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: How to delete all rows....
FLUSH table ?? Quoting Peter Lauri [EMAIL PROTECTED]: DELETE FROM table -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 10:35 AM To: mysql@lists.mysql.com Subject: How to delete all rows Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
But how will that interact with the auto increment counter? Will truncate reset the counter. Chris wrote: Peter Lauri wrote: DELETE FROM table Truncate will be a lot better. DELETE FROM table will do it row by row which also means it will have to update any indexes applicable to the table as it goes... Lots of data lots of indexes = very slow. -- Chris Wagner CBTS GE Aircraft Engines [EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: How to delete all rows....
Hi, I prefer using TRUNCATE statement. syntax: TRUNCATE [TABLE] tbl_name This takes lesser time when compared to the delete from table. It takes hardly few seconds. take a backup before executing this if required. Regards, N.Pradeep Chandru. -Original Message- From: Peter Lauri [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 1:26 PM To: [EMAIL PROTECTED]; mysql@lists.mysql.com Subject: RE: How to delete all rows DELETE FROM table -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 10:35 AM To: mysql@lists.mysql.com Subject: How to delete all rows Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
Peter Lauri wrote: DELETE FROM table Truncate will be a lot better. DELETE FROM table will do it row by row which also means it will have to update any indexes applicable to the table as it goes... Lots of data lots of indexes = very slow. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: How to delete all rows....
Sorry, did not read carefully. Either you loop thru all tables an do DELETE FROM table Or as someone else suggested, dump the structure, drop database, recreate from dump. /Peter -Original Message- From: Peter Lauri [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 2:56 PM To: [EMAIL PROTECTED]; mysql@lists.mysql.com Subject: RE: How to delete all rows DELETE FROM table -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 20, 2006 10:35 AM To: mysql@lists.mysql.com Subject: How to delete all rows Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: How to delete all rows....
Wagner, Chris (GEAE, CBTS) wrote: But how will that interact with the auto increment counter? Will truncate reset the counter. According to the docs it will: http://dev.mysql.com/doc/refman/5.1/en/truncate.html The table handler does not remember the last used AUTO_INCREMENT value, but starts counting from the beginning. This is true even for MyISAM and InnoDB, which normally do not reuse sequence values. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
How to delete all rows....
Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com
Re: How to delete all rows....
[EMAIL PROTECTED] wrote: Hi All, How do I delete all the rows of all the tables(but not table) in the database at one shot. Regards, Ravi K Hi - Please see http://dev.mysql.com/doc/refman/5.0/en/truncate.html Thanks -dant -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
