子查询为什么报错？
mysql> SELECT goods_id,goods_name,goods_price FROM tdb_goods WHERE goods_price > ANY (SELECT goods_price FROM tdb_goods WHERE goods_price='超级本');
Empty set, 1 warning (0.00 sec)
这是什么原因？
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mysql> SELECT goods_id,goods_name,goods_price FROM tdb_goods WHERE goods_price > ANY (SELECT goods_price FROM tdb_goods WHERE goods_price='超级本');
Empty set, 1 warning (0.00 sec)
这是什么原因？
2017-07-11
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