Not quite sure what the question is.
from:
mysql select * from table where id='1';
+---+-+-+---+
| 1 | 123 | 0.0 | C |
| 1 | 234 | 0.1 | D |
| 1 | 345 | 0.0 | D |
| 1 | 456 | 0.1 | C |
| 1 | 567 | 0.1 | G |
+---+-+-+---+
How do we deduce that you would want ID '3' ?
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 ash...@pcraft.com 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:
+---+-+-+---+
| 1 | 123 | 0.0 | C |
| 1 | 234 | 0.1 | D |
| 1 | 345 | 0.0 | D |
| 1 | 456 | 0.1 | C |
| 1 | 567 | 0.1 | G |
| 2 | 123 | 0.0 | C |
| 2 | 234 | 0.1 | D |
| 2 | 345 | 0.0 | D |
| 3 | 234 | 0.1 | D |
| 3 | 345 | 0.0 | D |
| 3 | 123 | 0.0 | C |
| 3 | 456 | 0.1 | C |
| 3 | 567 | 0.1 | G |
| 4 | 123 | 0.0 | C |
| 4 | 234 | 0.1 | D |
| 4 | 345 | 0.0 | D |
+---+-+-+---+
mysql select * from table where id='1';
+---+-+-+---+
| 1 | 123 | 0.0 | C |
| 1 | 234 | 0.1 | D |
| 1 | 345 | 0.0 | D |
| 1 | 456 | 0.1 | C |
| 1 | 567 | 0.1 | G |
+---+-+-+---+
Now, I have to find other IDs that match the above result. In the table,
that would be ID '3' (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 1, 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.
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- michael dykman
- mdyk...@gmail.com
May the Source be with you.
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