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in reply to Re: (OT) Exclusion selection on DBI
in thread (OT) Exclusion selection on DBI

Thank you very much for the advices. They have given to me deep insights about my problem. But I need to apologize Iíve not described the problem appropriately. I will try it again, here:

The complete table I have is like:

Fruit, colour, Id number of supermarket

I need to be able to select only the repeated fruits in two given supermarkets. So, if I have

Mellon, red, 1
Mellon, green, 2
Banana, black, 1
Orange, blue, 3

And if I want to get information about supermarket 1 and 2, the result will be

Mellon, red, 1
Mellon, green, 2

Iím using DBI module.

Thanks!

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Re^3: (OT) Exclusion selection on DBI
by moritz (Cardinal) on Jan 25, 2008 at 14:14 UTC
    The additional requirement of the supermarket id just adds a WHERE clause WHERE supermarket in (1, 2).

    And of course the supermarket ID has to appear in your SELECT list.