唯一性别总数:4唯一女性总数:1SELECT COUNT(DISTINCT tel, gender) as gender_count, SUM(if(gender = 'female', 1, 0)) as woman_countCOUNT(DISTINCT tel, gender = 'male') as ma
我想要的SQL如下所示: SELECT count(distinct user_id) FROM group WHERE pts > 0但是我知道我可以使用COUNT(DISTINCT user_id)来计算每个组中的总用户数,但是我如何计算满足条件'pts > 0‘的用户数量呢?我在用mysql,
谢谢。
$result1 = mysql_query("SELECT distinct city FROM postcodedb WHERE web='ALR' ORDER BY city") or die(mysql_error()); $city = $row1['city'];
$result = mysql_query("SELECT
MySQL如何处理subGROUP上聚集函数的合并结果与原始表中的完整字段?我正在使用这个,而且它很慢(除了CONDITION=1,我还需要其他条件) (SELECT CID,COUNT(DISTINCT RAID) AS AS_ALL FROM MYTABLE GROUP BY CID) a (SELECTCID,COUNT(DISTINCT RAID