How do I make a Backup of a MYSQL database ,,, It is simple as just copying the files of each table ? or exists a command to make backup ( including TEXT Fields ) ?
Thanks -----Original Message----- From: Michael Widenius [mailto:[EMAIL PROTECTED]] Sent: Thursday, November 29, 2001 10:51 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Proposal for two (or more) new time and date functions Hi! >>>>> "Jeremy" == Jeremy Zawodny <[EMAIL PROTECTED]> writes: Jeremy> On Wed, Nov 28, 2001 at 01:30:42PM -0800, [EMAIL PROTECTED] wrote: >> >> I think while you've got the hood up, a better method of doing the >> difference between two dates should be derived. >> >> Unless I'm going about this all wrong, the only way to get the time >> difference between two values currently is: >> >> UNIX_TIMESTAMP(end_datetime) - UNIX_TIMESTAMP(start_datetime) >> >> Wouldn't something like SECONDS_DIFF(start,end) make more sense? Or >> perhaps TIME_DIFF(start,end)? Jeremy> It's not the only way, but none of them are as simple as a Jeremy> SELECT date1 - date2 The problem with implementing the above simple expression is that you can easily run into problems because of the automatic convert of strings to numbers. For example: What should we do if one of the strings is a date and the other is a number or a string ? If we would do the above, then we would also be able to handle: SELECT "2001-01-01" - date from table_name; SELECT "2001-01-01" - "2000-01-01"; One simple solution is to to only do this if both columns are of type DATE. You can always 'cast' a column to date with: SELECT DATE "2001-01-01" - DATE "2000-01-01"; How would this sound? Regards, Monty --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
