SQL查询 - 分组/汇总跨多个表

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：并非所有的日期将同时拥有电话和销售。

附加表 -

有什么需要完成 -

1）加入和总通话和销售由职工通过加入电话表（上agent_no）和销售（在JDE ）表

2）由于不是所有的日期都包括呼叫和销售 - 使用日期维度表来确保所有日期都被表示

期望的结果是这样的 -

查询我写的执行 - 它需要很长时间我只是最终取消查询。

任何帮助，将不胜感激。

Answer 1

没有看到查询计划，这是一个有点棘手，但这里有可能会提高性能一些建议：

1. 删除开头的通配符where [skill_name] like '5700 sales l%'
2. 把group by到子查询

我在这里有一个例子，实现这两个。 （请注意，我做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

为了得到一排日期和员工的每个可能的组合，你会需要日期表和雇员表的交叉连接。

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];