统计报表 — sql统计语句

itlao6 DB 原创 开发&源码评论820字数 1399阅读4分39秒阅读模式

需要数据统计页面,肯定需要导出数据,于是,边学边写,完成了一段sql~

统计报表 — sql统计语句
统计报表 -- sql统计语句

最早的版本是这样的:分三条sql查出三种不同的状态的记录数(总记录,未支付,已支付)文章源自IT老刘-https://itlao6.com/786.html

SELECT COUNT(*) AS RecordCount FROM t_record WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00' 
SELECT COUNT(*) AS UnPayedCount FROM t_record WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00' AND IsPayed = 0
SELECT COUNT(*) AS PayedCount FROM t_record WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00' AND IsPayed = 1 

但是,还有一个需求,对记录数进行分日期进行统计,于是,需要改进,想到了用 GROUP BY 去实现; 但问题是CreateTime是DateTime, 接着百度之,找到了 CONVERT函数,于是变成了:文章源自IT老刘-https://itlao6.com/786.html

SELECT COUNT(*) AS RecordCount FROM t_record WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00' GROUP BY CONVERT(CreateTime,DATE)
SELECT COUNT(*) AS UnPayedCount FROM t_record WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00' AND IsPayed = 0 GROUP BY CONVERT(CreateTime,DATE)
SELECT COUNT(*) AS PayedCount FROM t_record WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00' AND IsPayed = 1 GROUP BY CONVERT(CreateTime,DATE)

但是,为什么不能一条sql查出来呢?这样在便利性还是性能上应该都会有所提升,能否在COUNT带条件或者在SUM做判断?于是,最终的sql出现了:文章源自IT老刘-https://itlao6.com/786.html

SELECT 
    CONVERT(CreateTime,DATE) AS RecordDate,
    COUNT(*) AS RecordCount, 
    SUM(CASE WHEN IsPayed = 0 THEN 1 ELSE 0 END) AS UnPayedCount,
    SUM(CASE WHEN IsPayed = 0 THEN 1 ELSE 0 END) AS PayedCount,
FROM t_record 
    WHERE CreateTime >= '2019-01-01 00:00:00'  AND CreateTime < '2019-02-01 00:00:00'
GROUP BY CONVERT(CreateTime,DATE)

原文:简书ThinkinLiu 博客: IT老五文章源自IT老刘-https://itlao6.com/786.html

相关报表图形绘制:统计报表 -- HignCharts:线形图饼图绘制及时间等定制文章源自IT老刘-https://itlao6.com/786.html

文章源自IT老刘-https://itlao6.com/786.html文章源自IT老刘-https://itlao6.com/786.html
继续阅读
weinxin
我的微信公众号
微信扫一扫关注公众号,不定时更新
itlao6
  • 本文由 发表于 2019年 2月 25日 13:24:49
  • 转载请务必保留本文链接:https://itlao6.com/786.html
评论  0  访客  0
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定