Question

我正在创建一个查询来获取每季度的数据。

我在user_target表quarter1，quarter2，quarter3和quarter4中有 4个字段 每个季度都有3个月，

quater1 - Jan Feb March
quater2 - Apr May June
quater3 - July Aug Sept
quater4 - Oct Nov Dec

现在当我在1月，2月或3月通过$ P {month}时，我应该得到quarter1的数据。同样地，当我在4月，5月或6月传递$ P {month}时，我应该获得quarter2等的数据。我不想在不同月份写出4个不同的查询。可以在单个查询中实现吗？

我对quater1的查询如下：

select    sum(t.quarter1) as quarter ,
          s.name as sname, f.name as fname, m.name as pname 
from user_target t, res_salesteam s, 
     account_fiscalyear f,res_users u, res_users ru, account_month m
where t.salesteam_id = s.id and 
      t.fiscal_year = f.id and  
      f.id = $P{fiscalyear} and 
      p.fiscalyear_id = f.id and 
      m.id = $P{month} and 
      u.parent_id = ru.id and 
      ru.id = $P{name} and (u.tri_salesteam = s.id or ru.tri_salesteam = u.id)
group by s.name, f.name, m.name order by s.name

Answer 1

您可以使用CASE ... END逻辑构造

SELECT sum(CASE
    WHEN $P{month} IN ('Jan','Feb','March') THEN t.quarter1
    WHEN $P{month} IN ('Apr','May','June') THEN t.quarter2
    WHEN $P{month} IN ('July','Aug','Sept') THEN t.quarter3
    WHEN $P{month} IN ('Oct','Nov','Dec') THEN t.quarter4
    ELSE 0 END) AS quarter,
    s.name as sname, f.name as fname, m.name as pname
  FROM ...

Answer 2

使用MYSQL函数QUARTER()获取四分之一的日期，并根据返回的季度使用sum获得if /else

尝试以下：

select sum(if(QUARTER(start_date)=1,t.quarter1,0)) as quarter1,
SUM(if(QUARTER(start_date)=2,t.quarter2,0)) as quarter2,
SUM((QUARTER(start_date)=3,t.quarter3,0)) as quarter3,
SUM(IF(QUARTER(start_date)=4,quarter4,0)) as quarter4,s.name as sname, f.name as fname, m.name as pname 
    from user_target t, res_salesteam s, account_fiscalyear f,res_users u, res_users ru, account_month m
    where t.salesteam_id = s.id and t.fiscal_year = f.id and  f.id = $P{fiscalyear} and p.fiscalyear_id = f.id and m.id = $P{month}
    and u.parent_id = ru.id and ru.id = $P{name} and (u.tri_salesteam = s.id or ru.tri_salesteam = u.id)
    group by s.name, f.name, m.name order by s.name

想在查询中添加if条件

2 个答案: