例如 select sum(b) over(partition by bb) as y,from
table 我想在这里使用x,y作为变量,如何避免写为 ((sum(a) over(partition by aa) as x) - (sum(b) over(partition by bb) as y)) /
我正试图在SQLite3中运行一个查询,其中我想要Case语句中的储蓄列的总计。我的SQL查询现在如下所示: SELECT COUNT(PhoneNumber), Dept, Device WHEN Device='Apple' THEN 500*COUNTEND AS 'Savings'WHERE Active= 'No' OR Cancel=1
GROUP BY Dept, Device 我尝试在CAS
为什么下面的查询要花费很长时间才能完成,而如果单独查询,则在几秒钟内返回?select count(*),count(distinct a), count(distinct b) from test.tablename;select count(*),count(distinct a) from test.tablename; select count(*),count(distinct b) fromtest.tablename;
有什么要加速的吗?蜂箱