如何对分组和计数的字段求和

Question

我需要 Counted 和 Grouped columns 中的 Sum。顺便说一下，我需要 Where Clause 特定条件。

这是我的复杂查询；

SELECT COUNT(id) AS Counted, State FROM Table1
GROUP BY State
HAVING State NOT IN (2,3)

UNION ALL

SELECT SUM(Say) AS SubSUM, State FROM (
    SELECT COUNT(b.id) AS SubCount, b.State FROM Table1 AS b
    GROUP BY b.State
    HAVING b.State IN (2,3)
) S GROUP BY S.State

我只想知道我有多少行，即 State 2 和 3。我希望得到解释。

Answer 1

我认为您可以使用条件聚合来做您想做的事。像这样：

SELECT COUNT(id) AS total,
       SUM(CASE WHEN State NOT IN (2, 3) THEN 1 ELSE 0 END),
       SUM(CASE WHEN State IN (2, 3) THEN 1 ELSE 0 END)
FROM Table1;

如何对分组和计数的字段求和

How to SUM Grouped and Counted Field

sql

tsql

sql-server

sum

count