What is the difference between detach and take offline?

Question

The difference is that detach deletes database metadata from SQL Server i.e. database file information, status information and all the other details that we see in sys. databases view. On the other hand taking database offline retains database metadata in SQL server system views. 19 мар. 2015 г.

What does taking a DB offline do?

A database can be taken offline either using transact-SQL or by using SQL Server management Studio (SSMS). I prefer taking database offline before dropping or deleting them. This is to avoid any mistakes or loosing data prematurely.

How do I turn off Take database offline?

This method was easy enough:1Right-click the database -> Properties -> Options.2Set Database Read-Only to True.3Click 'Yes' at the dialog warning SQL Server will close all connections to the database.4Re-open Options and turn read-only back off.5Now try renaming the database or taking it offline.Extreme wait-time when taking a SQL Server database offline

How do I delete a detached database?

1 Answer1Attach the database and drop it.2Log-in interactively on the server and delete the files from the disk.3Use xp_cmdshell (after enabling it), but don't forget to disable it (if it's not needed)How delete detached database on disk by T SQL? - Stack Overflow

Expert · Answer