How to migrate a SQL server database from one machine to another

Today we go with a fundamentally practical post. This is a “Step by Step” describing how migrar una databaseA database is an organized set of information that allows you to store, Manage and retrieve data efficiently. Used in various applications, from enterprise systems to online platforms, Databases can be relational or non-relational. Proper design is critical to optimizing performance and ensuring information integrity, thus facilitating informed decision-making in different contexts.... del servidor SQL and the most common SQL Server components among computers running SQL Server.

The steps in this post assume that the databases on the master system, model, tempdb and msdb won't move, but they provide different options so that the most common components and logins contained in master and msdb can be transferred.

Paso 1: How to move user databases

If you are using SQL Server 2005, you could use the same method to migrate data from SQL Server 7.0 o SQL Server 2000. Despite this, the administration tool in SQL Server 2005 is different from SQL Server 7.0 o SQL Server 2000. You must use SQL Server Management Studio instead of SQL Server Enterprise Manager. At the same time, SQL Server Import and Export Wizard should be used (DTSWizard.exe) instead of the DTS Data Import and Export Wizard.

Even when there are other methods, to migrate a SQL server database of users we are going to propose the make a backup of user databases on the origin server and later restore it on the destination server. To do it, Consider the following:

• Inactivity time: Users will be able to use the database while the backup is taking place, but keep in mind that if they do an INSERT, UPDATE or DELETE after the backup has been made, that backup will not contain the changes. If you also need to transfer them, you can do it with minimal downtime by backing up the transaction log and doing a full backup.
• Restore the full backup and specify the WITH NORECOVERY option.
• Back up the transaction log and restore it using the WITH RECOVERY option. Downtime is limited to when the transaction log is backed up and restored.
• Database size: Both of them (original and restored) they will be the same size. If you need to reduce it, you can do it before or after backing up and restoring it.

• Different locations: It may be the case that you need to restore the database to a location other than the location it was on the source server. If that's the case, you will have to use the WITH MOVE option. An example would be the case where you have the source database in D: MSSQL Data and the target server does not have a D drive. To restore the database in folder C: MSSQL Data, I would have to use that option.

• If you want to overwrite: You may need to rewrite to a database that already exists on the destination server. To do this, you must use the WITH REPLACE option.

• SQL versions: Depending on the version of SQL Server you restore to, it is possible that he is forced to have set of characters, Unicode collation and collation order they are the same on both the source and destination servers.

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You must transfer the logins so that current SQL Server users can log in to the new server. You have precise instructions on how to do it in this Microsoft Knowledge Base article.

Note that you can have different default databases for source and destination server logins, but you can change this with stored procedure sp_defaultdb.

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Once you have transferred the logins and passwords, users may not yet have access. The logins are associated to the users through the SID and if that SID is inconsistent, access will be denied. This is called having orphaned users.

• How to view orphaned users: Open query analyzer and run the following and see if it shows any: exec sp_change_users_login ‘Reporte’.

• Orphan database owner (dbo): For this case, will have to run this: exec sp_changedbowner ‘sa’. What this does is change the database owner to dbo and fix the problem. Subsequently, you can change it to the user you want by re-executing the above statement, but now with the user you want.

• Service Pack 1 de SQL Server 2000: If you have this service pack on the new server, you may not see the owner anywhere. To solve it you must follow the instructions of this Microsoft Knowledge Base article.

• Error trying to change sa password: This can happen if the login that dbo had on the source does not exist on the destination. Can you solve it following these instructions.

Up to here the obligatory steps. Then I could choose or not to approve the works in addition, alerts, DTS operators and packages.