Not quite sure what the question is. from: > mysql> select * from table where id='00001'; > +-------+-----+-----+---+ > | 00001 | 123 | 0.0 | C | > | 00001 | 234 | 0.1 | D | > | 00001 | 345 | 0.0 | D | > | 00001 | 456 | 0.1 | C | > | 00001 | 567 | 0.1 | G | > +-------+-----+-----+---+ How do we deduce that you would want ID '00003' ? This conversation would be easier if we gave names to those columns.. - michael dykman On Mon, Jul 19, 2010 at 12:36 PM, Ashley M. Kirchner <ashley@xxxxxxxxxx> wrote: > > I may be going at this completely wrong but at the moment I'm stuck. I > have a DB from a client and need to do several searches on it. This one > sentence is important because it's their DB, not mine. So I can't modify > the way the DB was created in the first place, I can only work with what I > have. And, whatever the solution to this might be, it does NOT have to be > strictly MySQL, it can also be a PHP solution (which is why I'm sending it > there as well.) So, having said that, consider the following table: > > +-------+-----+-----+---+ > | 00001 | 123 | 0.0 | C | > | 00001 | 234 | 0.1 | D | > | 00001 | 345 | 0.0 | D | > | 00001 | 456 | 0.1 | C | > | 00001 | 567 | 0.1 | G | > | 00002 | 123 | 0.0 | C | > | 00002 | 234 | 0.1 | D | > | 00002 | 345 | 0.0 | D | > | 00003 | 234 | 0.1 | D | > | 00003 | 345 | 0.0 | D | > | 00003 | 123 | 0.0 | C | > | 00003 | 456 | 0.1 | C | > | 00003 | 567 | 0.1 | G | > | 00004 | 123 | 0.0 | C | > | 00004 | 234 | 0.1 | D | > | 00004 | 345 | 0.0 | D | > +-------+-----+-----+---+ > > mysql> select * from table where id='00001'; > +-------+-----+-----+---+ > | 00001 | 123 | 0.0 | C | > | 00001 | 234 | 0.1 | D | > | 00001 | 345 | 0.0 | D | > | 00001 | 456 | 0.1 | C | > | 00001 | 567 | 0.1 | G | > +-------+-----+-----+---+ > > Now, I have to find other IDs that match the above result. In the table, > that would be ID '00003' (and in the entire DB, there may be others as well > - I need to find all those IDs.) But, notice how ID 0003 isn't in the same > order as ID 00001, but the data is still the same. > > So how do I efficiently search through the DB to find other IDs that > matches the one I need? I can't imagine doing a for loop selecting each ID > and comparing their result to the one I'm starting with. If the DB contains > thousands upon thousands of rows, that might take a very long time. > > Open to suggestions. > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=mdykman@xxxxxxxxxx > > -- - michael dykman - mdykman@xxxxxxxxx May the Source be with you. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
