> What are these constructs suppose to do?
x <op> all (select y from t where ...) is equivalent to not exists (select y from t where not (x <op> y) and ...) Any and some are synonyms. x <op> any (select y from t where ...) is equivalent to exists (select y from t where x <op> y and ...) Any can be confusing because of its ambiguity in the English language. If I say 'Is x greater than any y in t?', almost everyone will say the answer is yes if x is greater than one or more y-values in t -- but if I say 'x is greater than any y in t', you may interpret that to mean that x is greater than every y-value in t. This has lead any and all to be deprecated for new code in some circles. Regards
