zoukankan      html  css  js  c++  java
  • 常用的数据统计Sql 总结

    最近刚在搞一个BI的项目,里面需要大量的sql 数据统计相关运用,加深了我又对SQL的理解与使用。

    所以,分享几个数据统计时常用的sql 语句总结: 

    1. 统计各个条件下的数据

    select
    BatchId,sum(CardSum) 总金额,
    sum(case when Status=1 then CardSum else 0 end) as 已使用,
    sum(case when Status=2 then CardSum else 0 end) as 已冻结 
    from GiftCard 
    group by BatchId

    2. 统计每日,每月,每年的数据

    select year(AddTime) 年,month(AddTime) 月,day(AddTime) 日,COUNT(1) 数量,sum(CardSum) 销售合计
    from GiftCard
    group by year(AddTime),month(AddTime),day(AddTime)

    3. 某列去重统计

    select COUNT(BatchId),COUNT(distinct BatchId),COUNT(distinct BatchName)
    from GiftCard

    4. 行转列

    SELECT *
    FROM (
        SELECT 
            BatchName, 
            CardSum as TotAmount 
        FROM GiftCard
    
    ) as s
    PIVOT
    (    
        SUM(TotAmount)
        FOR BatchName IN (zx测试商品, test新人优惠券,测试高考大放送)
    )AS MyPivot

    5. 得到表中最小的未使用的ID号

    SELECT 
    (CASE WHEN EXISTS(SELECT * FROM GiftCard b WHERE b.Id = 1) THEN MIN(Id) + 1 ELSE 1 END) as Id 
    FROM GiftCard
    
    WHERE NOT Id IN (SELECT a.Id - 1 FROM GiftCard a)

    6. 查询某一列数据不重复的数量

    select * 
    from GiftCard a
    where not exists(select 1 from GiftCard where BatchName=a.BatchName and ID<a.ID)

    7. 按年统计1月到12个月的销量

    select year(AddTime) as '',
    SUM(case when MONTH(AddTime)=1 then CardSum else 0 end ) as '一月',
    SUM(case when MONTH(AddTime)=2 then CardSum else 0 end ) as '二月',
    SUM(case when MONTH(AddTime)=3 then CardSum else 0 end ) as '三月',
    SUM(case when MONTH(AddTime)=4 then CardSum else 0 end ) as '四月',
    SUM(case when MONTH(AddTime)=5 then CardSum else 0 end ) as '五月',
    SUM(case when MONTH(AddTime)=6 then CardSum else 0 end ) as '六月',
    SUM(case when MONTH(AddTime)=7 then CardSum else 0 end ) as '七月',
    SUM(case when MONTH(AddTime)=8 then CardSum else 0 end ) as '八月',
    SUM(case when MONTH(AddTime)=9 then CardSum else 0 end ) as '九月',
    SUM(case when MONTH(AddTime)=10 then CardSum else 0 end ) as '十月',
    SUM(case when MONTH(AddTime)=11 then CardSum else 0 end ) as '十一月',
    SUM(case when MONTH(AddTime)=12 then CardSum else 0 end ) as '十二月'
    
    from GiftCard
    
    group by year(AddTime)
  • 相关阅读:
    Spring Boot 整合Spring Security 和Swagger2 遇到的问题小结
    Android 解决listview中checkBox错位选择
    带checkbox的ListView实现(一)——数据与渲染完全分离的传统实现方式
    ViewPager + Fragment实现滑动标签页
    android中使用PopupWindow实现弹出窗口菜单
    Android TextView背景颜色与背景图片设置
    Android特效 五种Toast详解
    Android 带checkbox的listView 实现多选,全选,反选
    android 截取指定位置字符串
    带checkbox的ListView实现(二)——自定义Checkable控件的实现方法
  • 原文地址:https://www.cnblogs.com/zhangweizhong/p/5577842.html
Copyright © 2011-2022 走看看