sql实现分组查询的短语(SQL实现分组查询的短语是)

sql分组查询的完整语句

分组查询 group by 主要是对（count,sum,avg,min,max）

a b c

一 1 2

一 1 3

二 2 5

三 7 7

二 9 9

select a,sum(b),sum(c) from A group by a

对分组数据进行限制

select a,sum(b),sum(c) from A group by a having sum（b）>5根据species分组查询，group by 后面要写species，前面列出来的内容，除了species以外，如果是表里的字段都要用聚合函数，比如计数，求和，平均，最大值，最小值select A.b ,count(1),sum(A.b) from dual;答案在这里

SQL语句分组查询笔试题

select match_date,

sum(case when 佛跳墙原名 match_result ='win' then 1 else 0 end) as amount_win,

sum(case when match_result='lose' then 1 else 0 end) as amount_lose

from t_match

group by match_dateselect?racedate,

sum(case?when?result?=?'胜'?then?1?else?0?end)?胜,

sum(case?when?result?=?'负'?then?1?else?0?end)?负

from?gameresult

group?by?racedate