如何找到有結束日期比年份和月份

Question

較小的記錄我有ID和joiningdate列的表的員工，現在我想創建執行這樣的查詢：

1. 如果我通過月份和年份，然後所有的應顯示加入日期小於或等於此日期（月和年）的記錄。

2. 如果月份爲空，則不應考慮月份，只應考慮年份。

Answer 1

SELECT * FROM YourTable WHERE TheDate < 
    DATEADD(MONTH, CAST(COALESCE(@MONTH,1) AS int) - 1,CAST(CAST(@YEAR as varchar(4)) + '0101' AS DATETIME)); 

Answer 2

DECLARE @tblTest AS TABLE 
(
    Name VARCHAR(50), 
    JoiningDate Date 
) 

INSERT INTO @tblTest 
    Values ('Sandip','11-Feb-2016') 
    ,('Jigar','20-Jun-2016') 
    ,('Milan','05-Jan-2015') 
    ,('Suresh','25-Apr-2015') 


Declare @Month VARCHAR(20)='Feb',@Year VARCHAR(4)='2015' 
Declare @LastDateOfMonth Date 

IF ISNULL(@Month,'')='' 
BEGIN 
    SET @Month='DEC' 
END 

SET @LastDateOfMonth=DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, CAST('01-'+ @Month+'-'+@Year AS DATE)) + 1, 0)) 

SELECT 
    * 
FROM @tblTest 
WHERE 
    JoiningDate<=@LastDateOfMonth 

Answer 3

希望這有助於你：

Declare @yourtable table (EmpName varchar(10), JoiningDate datetime) 

INSERT INTO @yourtable 
    Values ('A','10-Jan-2016') 
    ,('B','20-Feb-2016') 
    ,('C','05-Apr-2016') 
    ,('D','31-Dec-2016') 

Declare @month varchar(3) = '' 
Declare @year varchar(4) = '2016' 

select * 
from @yourtable 
Where (isnull(@month,'') <> '' and 
(JoiningDate <= (SELECT DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,cast('01-'+@month+'-'+@year as date))+1,0))))) 
or (isnull(@month,'') = '' and (Year(JoiningDate) = @year))