Sql 同一分支机构同一季度数计算

我需要补充的是，当员工职务X切换到同一分支机构内的不同职务（Y或Z）时，修改他们在该新职务（Y或Z）所在季度的总FTE

因此，逻辑是：

对于位置X到Y 对于位置X到Z 正如您所看到的，我缺少正确执行此操作的一些SQL操作符的知识。如果您能提供任何帮助，我们将不胜感激！

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请，谢谢

一个粗略的草图，不同的DBMS供应商之间的日期算法有很大差异，所以我使用了您的表达式。我使用了变量：new_emplyee_title作为新标题

update Employees
    set [Total FTE calculated] = case when :new_emplyee_title = Y 
                                      then [ expression for Y ]
                                      else [ expression for Z ] 
                                 end
where [Position Start Date] between [Q2 start date] AND [Q2 end date]
  and [Employee Title] = X
  and :new_emplyee_title in (Y,Z);

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如果您的DBMS支持触发器，这将非常适合更新触发器。

非常感谢！我理解你的逻辑。我将对此进行修改，使其适用于我的用例。干杯

AND IF [Position Start Date] is between [Q2 start date] AND [Q2 end date]
AND [Employee Title] of [Employee ID] was X and is now Z
THEN [Total FTE calculated] = ([Position Start Date] - [Quarter Start Date])/[Days in Quarter]) * [Total FTE])

ELSE [Total FTE Calculated] = [Total FTE] * 1
END

update Employees
    set [Total FTE calculated] = case when :new_emplyee_title = Y 
                                      then [ expression for Y ]
                                      else [ expression for Z ] 
                                 end
where [Position Start Date] between [Q2 start date] AND [Q2 end date]
  and [Employee Title] = X
  and :new_emplyee_title in (Y,Z);