存储过程

Question

我有两张表dbo.tbRank和dbo.tbStaff

• 在dbo.Rank我有RankID和RankName
列
• 在dbo.Staff我有StaffID, StaffSNo, StaffRankID, StaffName, StaffGender
列

如何RankID tbStaff中的RankName tbRank与tbStaff相同？

非常感谢任何帮助。谢谢。

以下是ALTER PROCEDURE [dbo].[selectStaff] @sno as varchar(10) AS BEGIN SET NOCOUNT ON; -- Insert statements for procedure here if @sno = '' begin select StaffID, StaffSNo as 'Staff Service No.', StaffRankID, StaffName as 'Name', case StaffGender when 'f' then 'female' when 'm' then 'male' end as 'Gender' from tbStaff end else begin select StaffID, StaffSNo, StaffRankID, StaffName, StaffGender from tbStaff where StaffSNo = @sno end END 的存储过程：

{{1}}

Answer 1

根据您的需要使用左连接或内连接。

select 
                a.StaffID, a.StaffSNo as 'Staff Service No.', a.StaffRankID,
                a.StaffName as 'Name', 
                case a.StaffGender 
                   when 'f' then 'female' when 'm' then 'male' 
                end as 'Gender' , b.RankName
            from tbStaff a
left outer join Rank b on b.RankID  = a.StaffRankID

Answer 2

尝试以下查询

ALTER PROCEDURE [dbo].[selectStaff]
    @sno AS VARCHAR(10)
AS
BEGIN
IF LTRIM(RTRIM(@sno)) = ''
    BEGIN
        SELECT
            tST.StaffID,
            tST.StaffSNo AS 'Staff Service No.',
            tST.StaffRankID,
            tRK.RankName,
            tST.StaffName AS 'Name', 
            CASE tST.StaffGender 
               WHEN 'f' THEN 'female' WHEN 'm' THEN 'male'
            END AS Gender
        FROM tbStaff tST
        LEFT JOIN tbRank tRK ON tRK.RankID = tST.StaffRankID
    END
ELSE
    BEGIN
         SELECT 
             tST.StaffID, tST.StaffSNo, tST.StaffRankID, tRK.RankName, tST.StaffName, tST.StaffGender
         FROM tbStaff tST
         LEFT JOIN tbRank tRK ON tRK.RankID = tST.StaffRankID
         WHERE tST.StaffSNo = @sno 
    END
END

根据您的需要更改联接LEFT或INNER

Answer 3

这就是我做的。它奏效了。感谢所有帮助过的人。非常感谢您的帮助。

ALTER PROCEDURE [dbo]。[selectStaff]     @sno as varchar（10） 如 开始     设置NOCOUNT ON;     if @sno =''         开始             选择                 tbStaff.StaffID，                 tbStaff.StaffSNo为'服务号'，                 tbStaff.StaffRankID，                 tbRank.RankName为Rank，                 tbStaff.StaffName为'Name'，                 case tbStaff.StaffGender                     当'f'然后'女'                     当'm'然后'男'                 结束为'性别'

        from tbStaff
        inner join tbRank on tbRank.RankID = tbStaff.StaffRankID
    end
else 
    begin
        select 
        tbStaff.StaffID,
        tbStaff.StaffSNo as 'Service No.',
        tbStaff.StaffRankID,
        tbRank.RankName as Rank,
        tbStaff.StaffName as Name,
        tbStaff.StaffGender from tbStaff 
        inner join tbRank on tbRank.RankID = tbStaff.StaffRankID
        where StaffSNo=@sno 
    end

END *强调文字*