SELECT a=1,b=2
vs
SELECT 1 AS a, 2 AS b

what approach should i use ? (by best practice decisions)
Is there any advantages of one vs the other ?
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Personally I use
AS– it is more explicit and used elsewhere (table aliases).It is also standard – using the
=syntax will not work on some databases.I don’t believe there are any performance implications for using one over the other.