MySQL query count multiple values
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Published on 2010-04-13T18:21:44Z
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2010/04/13
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Consider the following DB table:
c p
=========
1 'a'
1 'b'
2 'a'
2 'c'
Now, my goal is to retrieve a list of numbers c, for which holds that each number in this list has at least a record with p='a' AND p='b'.
In the example table above, that would be c=1.
Now my question is, how do I accomplish this using one MySQL query?
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