Question

How do you get the UNION of these two queries:

SELECT dom,sub FROM table WHERE table.dom = X OR table.sub = X

SELECT dom,sub FROM table WHERE table.dom = Y OR table.sub = Y

dom and sub are integers, both queries return a set of integers, how do you then get the union of these two sets??

Any assistance appreciated…

Answer 1

You have got an answer using UNION, but why not just

SELECT dom,sub FROM table 
  WHERE table.dom = X OR table.sub = X OR table.dom = Y OR table.sub = Y

or

SELECT dom,sub FROM table 
  WHERE table.dom in (X,Y)  OR table.sub in (X,Y)

(assuming you are indeed talking about the same table in both queries)?