SQL 查询 - 跨多个表分组/聚合

Question

select D.[Date], E.emp_name, E.emp_jde, count(C.[agent_no]) calls, count(S.[EMPJDENUM]) sales
from
(select cast([start_date] as date) dte, [agent_no]
from call_table
where [skill_name] like '%5700 sales l%'
and [Agent_Time] != '0'
) C
full outer join
(select [AC#DTE_dt], [EMPJDENUM]
from sales_table
where [ICGCD2] in ('LAWN', 'HORT')
and [CHANNEL]= 'INQ'
and [ITMQTY]>3
) S on c.dte=s.[AC#DTE_dt]
right join
(select [Date]
from Date_table
) D on c.dte=d.[Date] or s.[AC#DTE_dt]=d.[Date]
right join
(select [emp_name], [emp_jde], [agent_no]
from Employee_table
) E on C.[agent_no]=E.agent_no and S.[EMPJDENUM]=E.emp_jde
group by D.[Date], E.emp_name, E.emp_jde

---

日期表 -

注意：并非所有日期都有电话和销售。

附加表 -

需要完成的事情——

1) 通过加入 call 表（在 agent_no 上）和 sales（在 JDE 上）表来加入和聚合员工的 call 和 sales

2) 由于并非所有日期都包括电话和销售 - 使用日期维度表来确保所有日期都被表示

想要的结果应该是这样的 -

我写的查询执行了 - 花了很长时间我最终取消了查询。

任何帮助将不胜感激。

Answer 1

没有看到查询计划，这有点棘手，但这里有几个可能会提高性能的建议：

1. 删除where [skill_name] like '5700 sales l%' 中的前导通配符
2. 将group by 放入子查询中

我这里有一个实现这两个的例子。 （请注意，我进行了一些重新格式化只是为了尝试了解您的查询在做什么。）

select D.[Date], E.emp_name, E.emp_jde, C.Calls, S.Sales
  from Date_table As D
  Left Join (
    select cast([start_date] as date) As CallDate, [agent_no], Count(*) As Calls
      from call_table
      where [skill_name] like '5700 sales l%'
        and [Agent_Time] != '0'
      Group By Cast([start_date] As date), [agent_no]) As C On D.[Date] = C.CallDate
  Left Join (
    select [AC#DTE_dt] As SaleDate, [EMPJDENUM], Count(*) As Sales
      from sales_table
      where [ICGCD2] in ('LAWN', 'HORT')
        and [CHANNEL]= 'INQ'
        and [ITMQTY]>3
      Group By [AC#DTE_dt], [EMPJDENUM]) As S on D.[Date] = s.SaleDate
  right join Employee_table As E 
    on C.[agent_no]=E.agent_no 
    and S.[EMPJDENUM]=E.emp_jde;

编辑

为了为每个可能的日期和员工组合获取一行，您需要对日期表和员工表进行交叉连接。

select D.[Date], E.emp_name, E.emp_jde, C.Calls, S.Sales
  from Date_table As D,
      Employee_table as E
  Left Join (
    select cast([start_date] as date) As CallDate, [agent_no], Count(*) As Calls
      from call_table
      where [skill_name] like '5700 sales l%'
        and [Agent_Time] != '0'
      Group By Cast([start_date] As date), [agent_no]) As C 
    On D.[Date] = C.CallDate
    And E.agent_no = C.agent_no
  Left Join (
    select [AC#DTE_dt] As SaleDate, [EMPJDENUM], Count(*) As Sales
      from sales_table
      where [ICGCD2] in ('LAWN', 'HORT')
        and [CHANNEL]= 'INQ'
        and [ITMQTY]>3
      Group By [AC#DTE_dt], [EMPJDENUM]) As S 
    on D.[Date] = s.SaleDate
    and E.emp_jde = S.[EMPJDENUM];