What is the difference between detach and take offline?

What is the difference between detach and take offline?

Detaching removes the registration of the database within SQL server. You will need to tell SQL server where the database file(s) are located when you go to make it operational again. Taking a database offline leaves the registration intact, so all you need to do is set it online to make it operational again.

What is take database offline SQL Server?

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.

What happens when you detach a database in SQL Server?

Detaching a Database. Detaching a database removes it from the instance of SQL Server but leaves the database intact within its data files and transaction log files. These files can then be used to attach the database to any instance of SQL Server, including the server from which the database was detached.

What is the difference between online database and offline database?

1 Answer. Online – you are connecting to a database that is up and running. Offline – allows you to define your Business Components against a database definition that is in JDeveloper and not a real live database. This allows you to work on ADF BC even when you don’t have connection to your database.

How do I delete a detached database in SQL Server?

1 Answer

1. Attach the database and drop it.
2. Log-in interactively on the server and delete the files from the disk.
3. Use xp_cmdshell (after enabling it), but don’t forget to disable it (if it’s not needed)

How can I tell if a SQL database is taken offline?

However, the information is captured (with date/time stamp) in the event log. So you’ll see an event from MSSQLSERVER with a description such as “Setting database option OFFLINE to ON for database MyDatabase”. You may get lucky if you have default trace enabled.

What is difference between offline and online?

The distinction between online and offline is conventionally seen as the distinction between computer-mediated communication and face-to-face communication (e.g., face time), respectively. Online is virtuality or cyberspace, and offline is reality (i.e., real life or “meatspace”).

What is difference between online and offline classes?

The main difference between online and offline learning is location. With offline learning, participants are required to travel to the training location, typically a lecture hall, college or classroom. With online learning, on the other hand, the training can be conducted from practically anywhere in the world.

What is the difference between detach and take database offline?

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. Let’s take a database offline.

How do I take a database offline with T-SQL?

Take SQL Server Database Offline with T-SQL 1 EXEC sp_who2 in the query window 2 F5 (or click Execute) 3 Look under the DBName column for any referenced to the database we’re taking offline and note the corresponding number under the SPID column

Is it safe to use offline and detach commands?

In most cases, Offline and Detach commands can be executed safely without any data loss. However, when you execute Drop Database command you pretty much lose all of your data immediately and the only way to get that back is via restoring the backup.

What are the downsides of offline mode in SQL monitoring?

Downside to Offline: May cause SQL Monitoring tools to throw alerts and create tickets, files are not in use by SQL Server, can be deleted. Removes the database from SSMS, deletes its meta information in the master database, but leaves the physical files intact on the drive. Choose “drop connections” here…if not, the detach may fail.