员工特定年份各月的工资答案

【问题标题】：Employee's salary of all month of specific year员工特定年份各月的工资
【发布时间】：2018-01-10 11:47:23
【问题描述】：

我有 2 张桌子 [EmployeeInfo] 和 [EmployeeInfoHistory]。我将员工的工资存储在这些表中。我能够根据各自的员工和东西获得员工的薪水。

但我想显示员工每个月的工资，如下所示。

我的结构是 [EmployeeInfo]：

Create Table [EmployeeInfo]
(
    EmpID Int,
    Salary Int,
    EmployementStatus Varchar(50),
    HiringDate Date
);

我的结构是 [EmployeeInfoHistory]：

Create Table [EmployeeInfoHistory]
(
    EmpID Int,
    NewSalary Int,
    UpdatedEmployementStatus Varchar(50),
    PromotionDate Date
);

信息表数据：

EmpID  Salary  Status   HiringDate
1      20000   Intern   2017-10-02
2      30000   Jr. DBA  2017-11-01

InfoHistory 表的数据：

EmpID  Salary  UpdatedStatus   PromotionDate
1      25000   Jr. DBA         2018-01-01
2      45000   Sr. DBA         2018-01-01

我想以给定的格式列出数据：

EmpID   Month     Salary  Status
1       October   20k     Intern
1       November  20k     Intern
1       December  20k     Intern
1       January   25k     Jr. DBA
2       November  30k     Jr. DBA
2       December  30k     Jr. DBA
2       January   45k     Sr. DBA

一个人能够帮助我，我们提出了一个问题，但我现在得到的是员工加入组织之日起的月薪。我想要一个特定的年份，比如 2017 年。

这里是查询：

; WITH DS AS
(
    SELECT cast (Dateadd(year, -25, getdate()) AS date) as [Date]
        UNION all
    SELECT dateadd(Month, 1, [Date])
        FROM DS
        WHERE Date < getdate()
)
Select 
    EMP.EmpID, 
    DateName(month, DS.[Date]) as [Month], 
    isnull(HIS.NewSalary, EMP.Salary) as Salary, 
    ISNULL(HIS.UpdatedStatus, EMP.EmployementStatus) as [Status]
from 
    EmployeeInfo as EMP
        inner join DS 
            on EMP.HiringDate <= DS.[Date]  
        left join EmployeeInfoHistory as HIS
            on HIS.EmpId = EMP.EmpID and HIS.PromotionDate <= DS.[Date]  
option (MaxRecursion 10000)

提前致谢。

【问题讨论】：

把“where YEAR(DS.[Date]) = 2017”放在“option(MaxRecursion 10000)”之前
@DenisRubashkin 这很简单。 :) 谢谢

标签： sql-server telerik-reporting

【解决方案1】：

简而言之，我同意丹尼斯的观点，但这是我的方法。它消除了递归的需要，使用了一个计数表 instea。

IF ((SELECT OBJECT_ID('tempdb..#t')) IS NOT NULL)
    DROP TABLE #t
IF ((SELECT OBJECT_ID('tempdb..#calendar')) IS NOT NULL)
    DROP TABLE #calendar


SELECT TOP (25 *12) -- 25 years
       IDENTITY(INT,0,1) AS N
INTO  #T
FROM  master.sys.all_columns ac1
        CROSS JOIN master.sys.all_columns ac2

SELECT  N
      , [StartOfMonth] = DATEADD( MONTH, DATEDIFF( MONTH, 0, GETDATE())-n, 0)
      , [Month]        = DATENAME(MONTH, DATEADD( MONTH, DATEDIFF( MONTH, 0, GETDATE())-n, 0))
      , [Year]         = DATENAME(YEAR,  DATEADD( MONTH, DATEDIFF( MONTH, 0, GETDATE())-n, 0)) 
      , [EndOfMonth]   = DATEADD( SECOND, -1,  DATEADD( MONTH, DATEDIFF( MONTH, 0, GETDATE())-n+1, 0))
INTO    #Calendar
FROM #T

SELECT  e.EmpID, 
        c.StartOfMonth,
        c.Month, 
        ISNULL(h.NewSalary, e.Salary) as Salary, 
        ISNULL(h.UpdatedEmployementStatus, e.EmployementStatus) as [Status]
FROM    EmployeeInfo as e
        INNER JOIN #Calendar c 
                ON e.HiringDate <= c.EndOfMonth
        LEFT JOIN EmployeeInfoHistory as h
                ON h.EmpId = e.EmpID 
                AND h.PromotionDate <= c.EndOfMonth
WHERE   c.Year = 2017
ORDER BY e.empid, c.StartOfMonth

【讨论】：