thinkphp中多表查询中防止数据重复的sql语句(必看)

tableid name1 a2 b3 c4 c5 b

select *, count(distinct name) from table group by name

id name count(distinct name)1 a 12 b 13 c 1

SELECT cat_id, COUNT(*) AS goods_num FROM talble GROUP BY cat_id$M = M('table');$rs = $M->field(array('cat_id','count(*)'=>'goods_num'))->group('cat_id')->select();echo $M->getLastSQL();print_r($rs);