mysql使用DISTINCT函数,报错ERROR 1140 (42000): In aggregated query without GROUP BY.....

现象: 执行sql SELECT COUNT(DISTINCT ( colum1 )),colum2, colum3  FROM table;报错ERROR 1140 (42000): In aggregated query without GROUP BY..... 原因: mysql的sql_mode默认开启了only_full_group_by模式,导致mysql的sql的group by
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