The following are both the same.
A world with AS
SELECT 'Alice' AS alice, 'Bob' AS bob ;
A world without AS
SELECT 'Alice' alice, 'Bob' bob ;
result
+-------+-----+ | alice | bob | +-------+-----+ | Alice | Bob | +-------+-----+
environment
- mysql Ver 14.14 Distrib 5.7.12, for osx 10.11 (x86_64) using EditLine wrapper
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