Question

我一直在网上寻找答案，但没有运气。我刚创建了一个帐户＆amp;我是新来的，所以请原谅我，如果帖子搞砸了。

我将提到查询所需的重要表格，

我在MS Access中有3个表（暂时迁移到SQL Server）：

T_Employee - ＆gt; Emp_ID，Emp_name，...
T_Custom_Calendar_Dates - ＆gt; YearNo，MonthNo，WeekNo，Week_Start_Date，Week_End_Date
T_Timesheet_Header - ＆gt; Emp_ID，Week_End_Date，...

T_Employee表将包含员工列表，Emp_ID为主键

T_Custom_calendar_Dates表包含以下示例数据：

Year_No   Month_No      WeekNo     Week_Start_Date    Week_End_Date
---------------------------------------------------------------------
2015           1           1        02/01/2015         08/01/2015
2015           1           2        09/01/2015         15/01/2015
2015           1           3        16/01/2015         22/01/2015
2015           1           4        23/01/2015         29/01/2015
2015           1           5        30/01/2015         05/02/2015
2015           2           1        06/02/2015         12/02/2015
2015           2           2        13/02/2015         19/02/2015
2015           2           3        20/02/2015         26/02/2015
2015           2           4        27/02/2015         05/03/2015
and so on till Month_No reaches 12

T_Timesheet_Header表应该包含EMP_ID和Week_End_Date，如下所示：

Emp_ID    Week_End_Date     ,other columns
----------------------------------
  1       08/01/2015
  1       15/01/2015
  1       29/01/2015

注意我已跳过输入2015年1月22日的记录

所以我要查找的查询是显示如下内容：

Week_End_Date           Emp_ID         Status
08/01/2015                1            Entered
15/01/2015                1            Entered
22/01/2015                1            Not Entered
29/01/2015                1            Entered
08/01/2015                2            Not Entered
15/01/2015                2            Not Entered
22/01/2015                2            Not Entered
29/01/2015                2            Not Entered

Week_end_date

T_Custom_Calendar_Dates

我不确定是否可以不创建临时表

我试着摆弄SQL连接但没有运气，希望有一些SQL大师来帮我吧

Answer 1

首先，您需要获得不同的emp_id和Week_End_dates的组合，以便考虑所有组合。您可以使用CROSS JOIN

执行此操作

SELECT
    t1.Week_End_Date,
    t2.Emp_ID
FROM
    T_Custom_Calendar_Dates As T1,
        (
            SELECT Emp_ID FROM T_Timesheet_Header GROUP BY Emp_ID
        ) as T2

您可以将其用作子查询，以加入T_Timesheet_Header表，以确定Week_End_Date EmpID / T_Timesheet_Header的唯一组合>

SELECT
    T3.Week_End_Date,
    T3.Emp_ID,
    IIF(ISNULL(T4.Emp_ID), "Not Entered", "Entered") AS [Status]
FROM
    (
            SELECT
                t1.Week_End_Date,
                t2.Emp_ID
            FROM
                T_Custom_Calendar_Dates As T1,                  
                (
                    SELECT Emp_ID FROM T_Timesheet_Header GROUP BY Emp_ID
                ) as T2
    ) as T3
    LEFT JOIN T_Timesheet_Header as T4 ON
        T3.Week_End_DAte = T4.Week_End_Date AND
        T3.Emp_ID = T4.Emp_ID

Answer 2

我不确定但是试一试

select tccd.Week_End_Date, 
  tth.Emp_ID, 
  SWITCH(IsNull(tth.Emp_ID), 'Not Entered',
              TRUE, 'Entered') AS Status
from T_Custom_calendar_Dates tccd left join T_Timesheet_Header tth 
on tccd.Emp_ID = th.Emp_ID

SQL查询在给定日期列表的员工时间表中显示状态为“未输入”

2 个答案: