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" <lists@dwsasia.com>
To: <ravi.karatagi@wipro.com>; <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: ravi.karatagi@wipro.com [mailto:ravi.karatagi@wipro.com]
> 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
>
>
>
>
>
>
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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.

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.

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