Question

我有这个程序，我想要将值列表插入表中，我想检查重复值并返回此但我收到此错误

ERROR：

子查询返回的值超过1。当子查询遵循=，！=，＆lt;，＆lt; =，＆gt;，＆gt; =或子查询用作表达式时，不允许这样做。

ALTER PROCEDURE [dbo].[insertData]
    @Value insertTbl READONLY,
    @Result INT OUTPUT
AS
BEGIN
    BEGIN TRY
        IF (SELECT   COUNT(Id)
            FROM     @Values
            WHERE    Id IN (SELECT   Id
                            FROM     [dbo].[username])) = 0
        BEGIN
            INSERT INTO dbo.username ( Id, NAME )
            SELECT   Id,
                     NAME
            FROM     @Values
            WHERE    Id NOT IN (SELECT   Id
                                FROM     [dbo].[username])

            SELECT   @Result = 101
        END
        ELSE
            SELECT   @Result = (
                         SELECT  Id
                         FROM    @Values
                         WHERE   Id IN (SELECT   Id
                                        FROM     [dbo].[username])
                     )
    END TRY

    BEGIN CATCH
        SELECT   ERROR_MESSAGE()
    END CATCH
END

Answer 1

请试试这个。

我已将返回类型更改为VARCHAR。这将返回CSV（例如1,3,9 ...）

另一种选择是返回结果集。为此，将SELECT @Result =替换为INSERT INTO @Result...

希望这有帮助。

ALTER PROCEDURE [dbo].[insertData]
    @Value insertTbl READONLY,
    @Result VARCHAR(500) OUTPUT
AS
BEGIN
    BEGIN TRY
        IF (SELECT   COUNT(Id)
            FROM     @Values
            WHERE    Id IN (SELECT   Id
                            FROM     [dbo].[username])
           ) = 0
        BEGIN
            INSERT INTO dbo.username (Id,NAME)
            SELECT   Id,
                     NAME
            FROM     @Values
            WHERE    Id NOT IN (SELECT   Id
                                FROM     [dbo].[username])

            SELECT   @Result = 101
        END
        ELSE
        BEGIN
            SELECT   @Result = (SELECT STUFF((SELECT ', ' + CAST(ID AS VARCHAR(5))
                                              FROM   @Values
                                              WHERE  Id IN (SELECT   Id
                                                            FROM     [dbo].[username])
                                              ORDER BY Id FOR XML PATH('')),1,2,''))
        END
    END TRY

    BEGIN CATCH
        SELECT   ERROR_MESSAGE()
    END CATCH
END

Answer 2

可能是这一行

SELECT @Result=(SELECT Id FROM  @Values  WHERE Id IN (SELECT Id FROM [dbo].[username]))

返回多行。您应该更改查询以仅返回一个值，如下所示

SELECT @Result=(SELECT top 1 Id FROM  @Values  WHERE Id IN (SELECT Id FROM [dbo].[username]))

或者你应该改变你的逻辑。另一种方法是使用temprary表返回ID的listo。尝试以下解决方案

-- create temporary table before (!) creating procedure
create table #Resulttab
(
  Result int
)
go
ALTER PROCEDURE [dbo].[insertData]
    @Value insertTbl READONLY,
    @Result INT OUTPUT -- in this solution I think you don't need this parameter
AS
BEGIN
    BEGIN TRY
        IF (SELECT   COUNT(Id)
            FROM     @Values
            WHERE    Id IN (SELECT   Id
                            FROM     [dbo].[username])) = 0
        BEGIN
            INSERT INTO dbo.username ( Id, NAME )
            SELECT   Id,
                     NAME
            FROM     @Values
            WHERE    Id NOT IN (SELECT   Id
                                FROM     [dbo].[username])

            SELECT   @Result = 101
        END
        ELSE
            insert into #Resulttab
            SELECT  Id
            FROM    @Values
            WHERE   Id IN (SELECT   Id
                           FROM     [dbo].[username])            
    END TRY

    BEGIN CATCH
        SELECT   ERROR_MESSAGE()
    END CATCH
END
go

您可以这样使用：

 -- create temporary table before run procedure 
 create table #Resulttab
 (
      Result int
 )
 -- run procedure with parameters  
 exec insertData ...  
 --after run procedure you can check list of your IDs 
 select Result from #Resulttab

在sql存储过程表类型中获取错误

2 个答案: