Update database table from one SQL Server database table to another?

Question

I am trying to update database fields from one SQL Server table to another.

Our production SQL Server is [spdbprod.test.com\\spprod], our QA server is

Answer 1

I know this has been answered already but this worked for me.

• Add a Linked Server under Server Objects | Linked Servers: Microsoft documentation.

• Name the Linked Server [SERVER-NAME or , ]

  e.g. [10.0.0.200,2345] - I am using port 2345 but the standard MS SQL port is 1433.

Example:

• We have a [Customers] table
• We want to update [CustomerAddress]-field for CustomerId = 123
• We want to use backup data from a server called [backupServer]
• The [backupServer] is the machine where we execute the SQL

This is the SQL-code:

UPDATE production
SET
    CustomerAddress = backupServer.CustomerAddress
FROM 
    [10.0.0.200,2345].[ProductionDatabase].[dbo].[Customers] production
INNER JOIN 
    [BackupDatabase].[dbo].[Customers] backupServer
        ON 
            production.CustomerId = backupServer.CustomerId
WHERE 
    backupServer.CustomerId = 123

Generalized format:

UPDATE production
SET
    columnName = backupServer.columnName
FROM 
    [SERVER-NAME or IP,PORT].[ProductionDatabase].[dbo].[tableName] production
INNER JOIN 
    [BackupDatabase].[dbo].[tableName] backupServer
        ON 
            production.SomeId = backupServer.SomeId
WHERE 
    backupServer.SomeId =