sql-server - 检查表中是否存在全年的存储过程

Question

我需要创建一个存储过程，它可以检查给定的开始和结束年份之间是否存在年份并返回那些存在的年份。例如，如果我提供 2000 作为开始年份和 2005 结束年份，那么它应该返回表中存在的那些年份。我已经尝试了以下代码，但它不起作用。

ALTER PROCEDURE [dbo].[CheckExistenceforyear] 

    @StYear int  = 0, 
    @EdYear int = 0,
    @SubStationID int = 0,
    @YrString varchar(255) = null Output
AS
BEGIN   
SET NOCOUNT ON;    

    Declare @TempValue varchar(4)
    if @StYear <= @EdYear
    while @StYear <= @EdYear
    Begin
    if (select Count(Sub.Year) from table sub where Sub.Year=@StYear and Sub.SubStationID = @SubStationID) > 0
            Begin

            select  @TempValue=Sub.Year from table as sub where Sub.Year=@StYear and Sub.SubStationID = @SubStationID
                set @YrString = @YrString + @TempValue  
            End
            set @StYear = @StYear +1  
        End
    Else
        return -1 

    select @YrString    
END

Answer 1

您可以使用简单的查询，例如

SELECT DISTINCT YEAR FROM TABLE WHERE YEAR BETWEEN STARTYEAR AND ENDYEAR.

BETWEEN运算符在WHERE 子句中用于选择两个值之间的数据范围。