問題描述

我正在嘗試從同一個 .sql 文件中創建多個用戶定義的函數.我正在使用 SQL Server 并使用 C# 的 System.Data 中的 SqlClient 執行我的查詢.

I am trying to create multiple user defined functions from within the same .sql file. I am using SQL Server and am executing my queries using the SqlClient from C#'s System.Data.

.sql 文件的內容:

Contents of the .sql file:

CREATE FUNCTION [dbo].[GetUserId] (@username VARCHAR(32))
RETURNS INT
AS
BEGIN
    DECLARE @userId INT = -1

    SET @userId = (SELECT DISTINCT UserId FROM Users WHERE UserName = @username)

    RETURN @userId
END
GO

CREATE FUNCTION [dbo].[GetUserId2] (@username2 VARCHAR(32))
RETURNS INT
AS
BEGIN
    DECLARE @userId2 INT = -1

    SET @userId2 = (SELECT DISTINCT UserId FROM Users WHERE UserName = @username2)

    RETURN @userId2
END

這是我執行語句時拋出的錯誤:

Here's the error that is thrown when I execute the statement:

System.Data.SqlClient.SqlException: 'GO' 附近的語法不正確.
必須聲明標量變量@username2".
'END' 附近的語法不正確.

System.Data.SqlClient.SqlException: 'Incorrect syntax near 'GO'.
Must declare the scalar variable "@username2".
Incorrect syntax near 'END'.'

有什么想法嗎?總的來說，我是 SQL 的新手，但這對我來說似乎是缺乏對語法/批處理的理解.

Any ideas? I'm new to SQL in general but this seems to be a lack of understanding syntax/batching to me.

我注意到GO"是 SQL Server Management Studio 的一部分，而不是 SqlClient.如果我從 .sql 文件中刪除GO"，則會收到此錯誤:

It has come to my attention that 'GO' is part of SQL Server Management Studio, and not the SqlClient. If I remove the 'GO' from my .sql file, then I get this error:

'CREATE FUNCTION' 必須是查詢批處理中的第一條語句.

'CREATE FUNCTION' must be the first statement in a query batch.

如何在不使用GO"的情況下分隔 CREATE FUNCTION 語句?

How do I separate CREATE FUNCTION statements without using 'GO'?

推薦答案

您不能在單個語句中運行多個批處理.

You cannot run multiple batches in a single statement.

我建議您使用 GO 拆分 TSQL 語句，然后逐個執行批處理.

I would suggest you to split your TSQL statement using GO and then execute the batches one by one.

string multipleUDFs = "CREATE FUNCTION... " +
"GO" + 
"CREATE FUNCTION ";
List<string> statementsToExecute = multileUDFs.Split("GO").ToList();

// Create the command 
var command = new SqlCommand(myConnection);

foreach(string sqlcommand in statementsToExecute)
{

// Change the SQL Command and execute
command.CommandText = sqlcommand;
command.ExecuteNonQuery();
}

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