Question

我想要合并3张桌子。一个是人员列表，一个是人员表中每个人的计划列表，第三个是每个人的临时计划列表。我想返回一个表格，其中包含人员的一些信息，然后是他们的日程表和临时表，其中两种类型的日程表开始和结束日期符合某些标准。我尝试了以下SQL代码......

SELECT Personnel.ID, Personnel.Name, Schedules.LinkID, Schedules.BeginDate, Schedules.EndDate, Schedules.Shift, tempSchedules.LinkID, tempSchedules.BeginDate, tempSchedules.EndDate, tempSchedules.Shift
FROM ((Personnel INNER JOIN Schedules ON (Schedules.LinkID = Personnel.ID  
AND ((Schedules.BeginDate BETWEEN #01-June-2014# and #30-June-2014#) OR (Schedules.EndDate BETWEEN #01-June-2014# and #30-June-2014#) OR (Schedules.BeginDate <=#01-June-2014# AND Schedules.EndDate >=#30-June-2014#))))
INNER JOIN tempSchedules ON (tempSchedules.LinkID = Personnel.ID
AND ((TempSchedules.BeginDate BETWEEN #01-June-2014# and #30-June-2014#) OR (TempSchedules.EndDate BETWEEN #01-June-2014# and #30-June-2014#) OR (TempSchedules.BeginDate <=#01-June-2014# AND TempSchedules.EndDate >=#30-June-2014#))))
ORDER BY Schedules.Shift

可以工作，除了它返回结果，其中只有TempSchedules和Schedules开始和结束日期符合条件，并将TempSchedules的列连接到Schedules列的一侧。例如，我得到以下列...

ID | Name | Schedules.LinkID | Schedules.BeginDate | Schedules.EndDate | Schedules.Shift | TempSchedules.LinkID | TempSchedules.BeginDate | TempSchedules.EndDate | TempSchedules.Shift

我希望它看起来像这样......

ID | Name | LinkID | BeginDate | EndDate | Shift

因此，我会从Schedule中获取与日期条件匹配的列，然后从TempSchedules获取符合日期条件的列。

ID | Name | LinkID | BeginDate     | EndDate     | Shift

01 | Bob  | 52     | 01-April-2014 | 01-Dec-2014 | Days
02 | Tim  | 34     | 01-Jan-2014   | 01-Aug-2014 | Days
03 | Bob  | 52     | 01-Jun-2014   | 15-Jun-2014 | Swings    //this is from temp schedules)
04 | Tim  | 34     | 07-Jun-2014   | 28-Jun-2014 | Graves   //this is from temp schedules)

我正在使用Javascript访问Microsoft Access数据库。

Answer 1

考虑使用UNION ALL：类似这样的事情：

SELECT  ID, Name, LinkID, BeginDate, EndDate, Shift
FROM (
SELECT Personnel.ID, Personnel.Name, Schedules.LinkID, Schedules.BeginDate, Schedules.EndDate, Schedules.Shift
FROM Personnel INNER JOIN Schedules ON (Schedules.LinkID = Personnel.ID  
AND ((Schedules.BeginDate BETWEEN #01-June-2014# and #30-June-2014#) OR (Schedules.EndDate BETWEEN #01-June-2014# and #30-June-2014#) OR (Schedules.BeginDate <=#01-June-2014# AND Schedules.EndDate >=#30-June-2014#)))
union all
SELECT Personnel.ID, Personnel.Name,tempSchedules.LinkID, tempSchedules.BeginDate, tempSchedules.EndDate, tempSchedules.Shift
FROM Personnel INNER JOIN tempSchedules  ON (tempSchedules.LinkID = Personnel.ID  
AND ((tempSchedules.BeginDate BETWEEN #01-June-2014# and #30-June-2014#) OR (tempSchedules.EndDate BETWEEN #01-June-2014# and #30-June-2014#) OR (tempSchedules.BeginDate <=#01-June-2014# AND tempSchedules.EndDate >=#30-June-2014#)))
)
ORDER BY Shift

使用多个'和'连接多个表

1 个答案: