如果我有桌子
AgentID | IsNew | TeamID
1 N 1
2 Y 2
3 Y 2
4 N 2
5 Y 1
我想从查询中返回以下内容:
Team | CountIsNew = N | CountIsNew = Y
1 1 1
2 1 2
我有办法做到这一点吗? 使用Oracle 10
答案 0 :(得分:8)
SELECT team, SUM(DECODE(IsNew, 'N', 1, 0)), SUM(DECODE(IsNew, 'Y', 1, 0))
FROM mytable
GROUP BY
team
答案 1 :(得分:5)
SELECT TeamId
, SUM(CASE WHEN IsNew = 'N' THEN 1 ELSE 0 END) AS CountIsNotNew
, SUM(CASE WHEN IsNew = 'Y' THEN 1 ELSE 0 END) AS CountIsNew
FROM Agent
GROUP BY TeamId
答案 2 :(得分:0)
另一种方式 - COUNT不计算NULL(COUNT(*)
除外):
SELECT TeamId,
COUNT(DECODE(IsNew,'N',1)) CountIsNotNew,
COUNT(DECODE(IsNew,'Y',1)) CountIsNew
FROM Agent
GROUP BY TeamId;
或者,如果您更喜欢CASE:
SELECT TeamId,
COUNT(CASE IsNew WHEN 'N' THEN 1 END) CountIsNotNew,
COUNT(CASE IsNew WHEN 'Y' THEN 1 END) CountIsNew
FROM Agent
GROUP BY TeamId;
(注意:“1”可以是任何字面值)