sql - 通过动态调用使用 SQLCMD 的更智能方式

Question

我有这个 MSSQL SQLCMD 代码，它可以登录数据库，并在其中执行 SELECT 语句:

   :CONNECT czasql-001
   SELECT * FROM [Lps_Hepper_Cz].[config].[LpsPlant]
  GO

    :CONNECT LS_Hepper_DK

    SELECT * FROM [LPS_Hepper_NY].[config].[LpsPlant]

    :CONNECT LS_Hepper_DK
    SELECT * FROM [LPS_Hepper_DK].[config].[LpsPlant]

    :CONNECT LS_Hepper_DK
    SELECT * FROM [LPS_Hepper_SUPPLIER].[config].[LpsPlant]
    GO

           :CONNECT LS_Hepper_372
    SELECT * FROM [LPS_Hepper_MO].[config].[LpsPlant]
    GO

           :CONNECT LS_Hepper_678
    SELECT * FROM [LPS_Hepper_678].[config].[LpsPlant]
    GO

此解决方案工作正常，但需要我多次复制粘贴副本才能更改数据库名称。但是有人可以通过使用循环来帮助我改进这一点吗？我尝试过使用临时表。就像这样:

 declare @tbl table (ServerName nvarchar(50), DbName nvarchar(50), IsDone bit default(0))
 insert into @tbl (ServerName,DbName) VALUES ('CZASQL-001', '[Lps_Hepper_CZ]')
 insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_DK',  '[Lps_Hepper_DK]')
 insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_DK',  '[Lps_Hepper_NY]')
 insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_DK',  '[Lps_Hepper_Supplier]')
 insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_372', '[Lps_Hepper_MO]')
 insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_678', '[Lps_Hepper_678]')

但是当我拥有的数据为 nvarchar 时，我无法弄清楚如何执行迭代数据库、连接到服务器并设置数据库名称的逻辑？ 有人有建议吗？

更新: 我只会将其用于插入/更新或删除。所以我不使用存储过程。我喜欢用它来更新我们所有数据库上的数据。这就是为什么我只使用临时表，它应该是脚本的一部分。

服务器名称和数据库名称将来自上面的临时表。所有数据库的表名称都相同，因为我们在全局范围内都有数据库副本以限制数据下载，所以我需要确保当我更新一个数据库时，我也会更新其余的数据库。

更新 2: 我尝试使用它，但我一直停滞不前，无法使用临时表中的值。这意味着我无法使用 :SETVAR 来设置服务器名称:

  declare @tbl table (ServerName nvarchar(50), DbName nvarchar(50), IsDone bit default(0))
     insert into @tbl (ServerName,DbName) VALUES ('CZASQL-001', '[Lps_Hepper_CZ]')
     insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_DK',  '[Lps_Hepper_DK]')
     insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_DK',  '[Lps_Hepper_NY]')
     insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_DK',  '[Lps_Hepper_Supplier]')
     insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_372', '[Lps_Hepper_MO]')
     insert into @tbl (ServerName,DbName) VALUES ('LS_Hepper_678', '[Lps_Hepper_678]')

      WHILE (SELECT COUNT(*) FROM @tbl WHERE IsDone = 0) > 0
        BEGIN

        DECLARE @selectedRow INT = (SELECT TOP 1 Id FROM @tbl WHERE IsDone = 0)
        --DECLARE @ServerName NVARCHAR(50)= (SELECT ServerName FROM @tbl WHERE Id = @selectedRow)
        --DECLARE @DatabaseName NVARCHAR(50) = (SELECT DbName FROM @tbl WHERE Id = @selectedRow)
         DECLARE @ServerName sysname= (SELECT ServerName FROM @tbl WHERE Id = @selectedRow)
        DECLARE @DatabaseName sysname = (SELECT DbName FROM @tbl WHERE Id = @selectedRow)

        :SETVAR DatabaseName @DatabaseName
        :SETVAR ServerName @ServerName
        SELECT ServerName --This looks correctly
        print CONVERT(NVARCHAR(100),@selectedRow)
        :CONNECT ServerName

           USE @DatabaseName
           GO
          SELECT * FROM [config].[LpsPlant]
         GO

         UPDATE @tbl SET IsDone = 1 WHERE Id = @selectedRow
    END;

Answer 1

I'm only going to use this for INSERT/UPDATE or DELETE. So im not using a stored procedure. I like to use this for updating data on all our databases

如果是这种情况，您可以考虑使用 Registered Servers :

Benefits of Registered Servers

With Registered Servers you can:

• Register servers to preserve the connection information.

• Determine if a registered server is running.

• Easily connect Object Explorer and Query Editor to a registered server.

• Edit or delete the registration information for a registered server.

• Create groups of servers.

• Provide user-friendly names for registered servers by providing a value in the Registered server name box that is different from the Server name list.

• Provide detailed descriptions for registered servers.

• Provide detailed descriptions of registered server groups.

• Export registered server groups.

• Import registered server groups.

• View the SQL Server log files for online or offline instances of SQL Server

• Execute Statements Against Multiple Servers Simultaneously

您可以基于服务器/数据库/环境(DEV/PROD/QA)创建多个组。

另一种可能性是将注册的服务器导出到文件，放入源代码控制系统(SVN/Git)并与其他开发人员共享。

使用 SSMS，您可以根据服务器组单击新查询，并同时在多个数据库上执行相同的查询。

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