sql,SELECT column_name, COUNT(*),FROM table_name,GROUP BY column_name,HAVING COUNT(*) > 1;,
`,,这段代码会返回所有在
column_name`列中出现超过一次的值及其出现的次数。sql,SELECT column_name, COUNT(*),FROM table_name,GROUP BY column_name,HAVING COUNT(*) > 1;,
`,,这段代码会返回所有在
column_name`列中出现超过一次的值及其出现的次数。Powered By Z-BlogPHP 1.7.3