我正在尝试从表中获取唯一值,该表包含以下内容作为时间日志文件:
id | time | code | user
1 | 7000 | xxxx | 1
2 | 7000 | xxxx | 1
3 | 7500 | xxxx | 2
4 | 7000 | xxxx | 3
我想知道有多少唯一用户当时使用过该代码,例如7000,应该说2,但我写的与众不同,我得到3
SELECT Time, COUNT(*) as total, Code
FROM dbo.AnalyticsPause
WHERE CODE = 'xxxx'
GROUP BY id, Time, Code
结果:
time | Count | code
7000 | 3 | xxxx
7500 | 1 | xxxx
我想去的地方
time | Count | code
7000 | 2 | xxxx
7500 | 1 | xxxx
我如何能够在id_user上添加一个非重复的内容,并且仍然一直在一起计数
答案 0 :(得分:7)
count(*)
计算行数(在组中)。您应该只计算distinct user
:
SELECT Time, COUNT(DISTINCT user) as total, Code
FROM dbo.AnalyticsPause
WHERE code = 'xxxx'
GROUP BY Time, Code