Question

我正在编写此商店程序，但一直收到错误。

我的程序：

USE AllCtuStudentInfo
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE SelectProcedure4

    @myVar VARCHAR(8000),
    @Schema varchar(50),
    @ID int
    --@ix INT = 1


AS
--WHILE @ix < 1000
BEGIN
    set @myVar = 'SELECT '+@Schema+'.Student.Name, '+@Schema+'.Student.Surname, '+@Schema+'.Course.Name AS Course,'+@Schema+'.LearningUnit.Name AS [Learning Unit], '+@Schema+'.Formative.[Formative Name], '+@Schema+'.FormativeMark.Mark, '+@Schema+'.Summative.[Summative Name], '+@Schema+'.SummativeMark.Mark AS Mark FROM '+@Schema+'.LearningUnit INNER JOIN '+@Schema+'.Formative INNER JOIN '+@Schema+'.Course INNER JOIN '+@Schema+'.SummativeMark INNER JOIN '+@Schema+'.FormativeMark INNER JOIN '+@Schema+'.Student ON '+@Schema+'.FormativeMark.FK_Student = '+@Schema+'.Student.ID ON '+@Schema+'.SummativeMark.FK_Student = '+@Schema+'.Student.ID ON  '+@Schema+'.Course.ID = '+@Schema+'.Student.FK_Course  INNER JOIN '+@Schema+'.Summative ON '+@Schema+'.SummativeMark.FK_Summative = '+@Schema+'.Summative.ID ON '+@Schema+'.Formative.ID = '+@Schema+'.FormativeMark.FK_Formative ON  '+@Schema+'.LearningUnit.ID = '+@Schema+'.Summative.FK_LU AND '+@Schema+'.LearningUnit.ID = '+@Schema+'.Formative.FK_LU WHERE '+@Schema+'.Student.ID = '''+CAST(@ID AS VARCHAR(10))+''';'
    --SET @ix = @ix + 1
    EXEC @myVar
END

我如何执行它：

USE AllCtuStudentInfo

EXEC SelectProcedure4 @myVar = '',  @Schema = 'Auckland_Park', @ID = 1

错误：

Msg 203，Level 16，State 2，Procedure SelectProcedure4，Line 15

名称'SELECT Auckland_Park.Student.Name，   Auckland_Park.Student.Surname，Auckland_Park.Course.Name AS   课程，Auckland_Park.LearningUnit.Name AS [学习单元]，   Auckland_Park.Formative。[形式名称]，   Auckland_Park.FormativeMark.Mark，Auckland_Park.Summative。[Summative   名称]，Auckland_Park.SummativeMark.Mark AS Mark FROM   Auckland_Park.LearningUnit INNER JOIN Auckland_Park.Formative INNER   加入Auckland_Park.Course INNER加入Auckland_Park.SummativeMark INNER   加入Auckland_Park.FormativeMark INNER JOIN Auckland_Park.Student ON   Auckland_Park.FormativeMark.FK_Student = Auckland_Park.Student.ID ON   Auckland_Park.SummativeMark.FK_Student =奥克兰'无效   标识符

你可以看到它被切断了。我尝试了其他一些方法，但我总是遇到同样的错误，它会在同一个地方被切断。

请帮忙！

Answer 1

下面是一个使用sp_executesql和参数化查询的示例。

CREATE PROCEDURE dbo.SelectProcedure4

    @myVar nvarchar(MAX),
    @Schema sysname,
    @ID int
AS
DECLARE @SchemaName nvarchar(130) = QUOTENAME(@Schema);

SET @myVar = 'SELECT '+@SchemaName+'.Student.Name, '+@SchemaName+'.Student.Surname, '+@SchemaName+'.Course.Name AS Course,'+@SchemaName+'.LearningUnit.Name AS [Learning Unit], '+@SchemaName+'.Formative.[Formative Name], '+@SchemaName+'.FormativeMark.Mark, '+@SchemaName+'.Summative.[Summative Name], '+@SchemaName+'.SummativeMark.Mark AS Mark FROM '+@SchemaName+'.LearningUnit INNER JOIN '+@SchemaName+'.Formative INNER JOIN '+@SchemaName+'.Course INNER JOIN '+@SchemaName+'.SummativeMark INNER JOIN '+@SchemaName+'.FormativeMark INNER JOIN '+@SchemaName+'.Student ON '+@SchemaName+'.FormativeMark.FK_Student = '+@SchemaName+'.Student.ID ON '+@SchemaName+'.SummativeMark.FK_Student = '+@SchemaName+'.Student.ID ON  '+@SchemaName+'.Course.ID = '+@SchemaName+'.Student.FK_Course  INNER JOIN '+@SchemaName+'.Summative ON '+@SchemaName+'.SummativeMark.FK_Summative = '+@SchemaName+'.Summative.ID ON '+@SchemaName+'.Formative.ID = '+@SchemaName+'.FormativeMark.FK_Formative ON  '+@SchemaName+'.LearningUnit.ID = '+@SchemaName+'.Summative.FK_LU AND '+@SchemaName+'.LearningUnit.ID = '+@SchemaName+'.Formative.FK_LU WHERE '+@SchemaName+'.Student.ID = @ID;'

EXECUTE sp_executesql @myVar, N'@ID int', @ID= @ID;
GO

存储过程中的字符串长

1 个答案: