c# - 如何将列名和表名作为 SQL Server 中的参数传递给存储过程？

Question

我有一个存储过程，它将列名和表名作为参数。

ALTER PROCEDURE [dbo].[usp_TableReporting_GetColumnNamesAndValues]
    @concatstring AS VARCHAR(100),
    @Tablename as VARCHAR(100)
AS
BEGIN
    SELECT @concatstring FROM @Tablename
END

这个过程给我一个错误:

Must declare the scalar variable @TableName

虽然我已经在上面声明过了。

Answer 1

使用动态 SQL:

ALTER PROCEDURE [dbo].[usp_TableReporting_GetColumnNamesAndValues]
@concatstring AS VARCHAR(100),
@Tablename as VARCHAR(100)

AS
BEGIN
    Declare @mystring varchar(max) = N'select ' +  @concatstring + ' from ' + @Tablename
    exec (@mystring)

END