#server #backup #services
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I know that you can’t (at least not easily) restore a SQL Server 2012 backup on SQL Server 2008. But how does it work for SQL Server 2014 to SQL Server 2012 ?
On database level there is the property to adjust the compatibility mode to any other SQL Server version.
How does this helps or work. Will it only disallow the features from 2014?
To be honest I already tried to restore a backup, but 2012 didn’t recognize the datafile, so I couldn’t click ok Button to start the restore procedure.
Did I miss some important option ?
You CANNOT do this – you cannot attach/detach or backup/restore a database from a newer version of SQL Server down to an older version – the internal file structures are just too different to support backwards compatibility. This is still true in SQL Server 2014 – you cannot restore a 2014 backup on anything other than another 2014 box (or something newer ).
You can either get around this problem by
using the same version of SQL Server on all your machines – then you can easily backup/restore databases between instances
otherwise you can create the database scripts for both structure (tables, view, stored procedures etc.) and for contents (the actual data contained in the tables) either in SQL Server Management Studio ( Tasks Generate Scripts ) or using a third-party tool
or you can use a third-party tool like Red-Gate’s SQL Compare and SQL Data Compare to do “diffing” between your source and target, generate update scripts from those differences, and then execute those scripts on the target platform; this works across different SQL Server versions.
The compatibility mode setting just controls what T-SQL features are available to you – which can help to prevent accidentally using new features not available in other servers. But it does NOT change the internal file format for the .mdf files – this is NOT a solution for that particular problem – there is no solution for restoring a backup fro a newer version of SQL Server on an older instance.
answered Jul 30 ’14 at 17:25
Expanding on this a bit. When I just used the export data, I lost all my indexes, constraints, etc. I had luck generating the scripts for all the objects in the 2014 database, then running those on the 2012 server. I then disabled all the constraints, and ran export data to copy all the data over to the new db shell. Just remember to enable identity insert from the options in the export data wizard. Also remember to enable the constraints after. ScottLenart May 19 at 20:24