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select * from t1 t1_alias, t2 t2_alias, t3 t where a=10
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SELECT * FROM t1 t, t3 t3 where a=10
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UPDATE t1 t, t3 t3 SET a=10
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DELETE FROM t1 t, t3 t3
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DELETE FROM t1 t, t3 t3 WHERE t.a=1
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SELECT * FROM mysql.help_category h, mysql.help_category he
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