Question

I have a table with multiple columns and want to find only those where a combination of A and B is distinct.

There may be several such rows and I want to get every field of the row for each distinct combination of A and B (let’s say there are also columns C and D).

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Clarification:

I want to say something like

for each distinct A/B combination
   get C and D

Answer 1

This sounds like it should be solved using a GROUP BY but could also possibly be a UNION as specified by this question:

Select distinct from multiple fields using sql