从脚本创建数据库时，关键字 'USE' 附近的语法不正确错误

Question

我正在开发一个多租户应用程序，因此我需要为每个新客户端从代码创建数据库。我已经从 SSMS "Generate Script" 实用程序生成了我的架构脚本，然后我尝试了以下操作：

public static void CreateIfNotExist(string path) // the path where the script for creating database is located
{
    var db = System.Web.HttpContext.Current.Session["dbName"].ToString();
    using (var con = new SqlConnection("Data Source=.; uid=sa; pwd=password;"))
    {
        con.Open();

        var xmlStr = File.ReadAllText(path);
        var str = XElement.Parse(xmlStr);
        foreach (var item in str.Elements())
        {
             var query = "CREATE DATABASE " + db + Environment.NewLine +  "GO" + Environment.NewLine + "USE " + db + Environment.NewLine + "GO" + Environment.NewLine;
             var scriptToRun = File.ReadAllText(item.Value);
             query += scriptToRun;

             SqlCommand cmd = new SqlCommand(query, con);
             try
             {
                 cmd.ExecuteNonQuery();
             }
             catch (Exception ex)
             {
             }
        }

    }
}

我的脚本是：

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING OFF
GO
CREATE TABLE [dbo].[ACOD](
    [id] [numeric](10, 0) NOT NULL,
    [serial] [numeric](10, 0) NULL,
    [name] [varchar](250) NULL,
 CONSTRAINT [PK_ACOD] PRIMARY KEY CLUSTERED 
(
    [id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO
SET ANSI_PADDING OFF
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING OFF
GO
CREATE TABLE [dbo].[AGZH](
    [id] [numeric](10, 0) NOT NULL,
    [number] [numeric](10, 0) NULL,
    [date] [smalldatetime] NULL,
    [name] [varchar](50) NULL,
CONSTRAINT [PK_AGZH] PRIMARY KEY CLUSTERED 
(
    [id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO
SET ANSI_PADDING OFF
GO

这只是脚本的一部分。实际上，我有 100 多个 table，每个 table 都有超过 50 列。

现在，当我使用上面编写的 C# 代码时，出现以下异常：

Incorrect syntax near the keyword 'USE'. Database 'databaseName' does not exist. Make sure that the name is entered correctly.

但是当我从 Visual Studio 中的文本可视化工具获取脚本并在 SSMS 中执行它时，它成功运行并创建了新的数据库名称。

我做错了什么？请帮忙。

Answer 1

GO 不是 T-SQL.

中的合法命令

此命令由您在其中编辑脚本的任何程序处理，例如 SQL Server Management Studio，并用作分隔符将您的大查询分成多个较小的查询。

您不能将 GO 命令发送到 SQL 服务器，否则您会收到该错误。

所以基本上你应该使用 GO 命令来分隔你的查询并只执行中间的位，一次一位。

这里是 documentation of GO (Transact-SQL):

GO is not a Transact-SQL statement; it is a command recognized by the sqlcmd and osql utilities and SQL Server Management Studio Code editor.

从脚本创建数据库时，关键字 'USE' 附近的语法不正确错误

Incorrect syntax near the keyword 'USE' error while creating database from Script

c#

sql-server

ado.net

sqlcommand