通过WorkAround应用于Group之后的位置？

Question

有没有办法解决在group by语句后无法使用where子句的问题？假设我需要拥有该组，我想说WHERE x LIKE 'y'是否有解决方法？

Answer 1

如果要逐个过滤表达式，可以将过滤器放在HAVING子句中。

select first, second, third, sum(something) something_summed
from tablea
group by first, second, third
having first + second < 10

Answer 2

Select c1,c2,c4
From (
    Select c1,c2,sum(c3) as c4
    From table1
    Group by c1, c2
     ) A
Where A.c1 Like 'yyy'