如何在一个sql查询中使用多个where子句

Question

大家好我需要在一个sql查询中使用多个where子句，如下所示，但它无法帮助我。

select (select count(total) as 'studentMarks1' from School  where total <60 ),
       (select count(total) as 'studentMarks2' from School  where total >80 ) 
from School
where Id = '8'

Answer 1

您需要使用{/ 1}}语句，如

CASE

Answer 2

您通常会使用适当的void translateOutline(vector<Point>& outline, Point center) { for (auto & point : outline){ point = point + center; } } 声明执行此操作：

CASE