The data and transaction log files of a database can be detached and then reattached to the same or another instance of SQL Server. Detaching and attaching a database is useful if you want to change the database to a different instance of SQL Server on the same computer or to move the database. Note: When the log file was recreated, SQL Server automatically suffixed '. CREATE DATABASE MyDB1 ON. FilesMicrosoft SQL Server MSSQL10.SQL2008MSSQLDATASummary Database DataData File for Monthly New log file 'C.
Attaching Database without ldf file? IF you have properly detached then only you can attachy the db using this System sp.
And also it will not work if the db have multiple LOG files.
Either the data file damage will prevent the attach, or the log file damage will prevent crash recovery from being started or completed. How can I attach a database without an LDF file in SQL Server? Attaching the Damaged SQL Server Database The first step is to create a new database.
Database Detach and Attach (SQL Server)You can attach a copied or detached SQL Server database. For more information, see Upgrade Full- Text Search from SQL Server 2. When you attach a database, all data files (MDF and NDF files) must be available. If any data file has a different path from when the database was first created or last attached, you must specify the current path of the file. Note. If the primary data file being attached is read- only, the Database Engine assumes that the database is read- only. When an encrypted database is first attached to an instance of SQL Server, the database owner must open the master key of the database by executing the following statement: OPEN MASTER KEY DECRYPTION BY PASSWORD = 'password'. We recommend that you enable automatic decryption of the master key by executing the following statement: ALTER MASTER KEY ADD ENCRYPTION BY SERVICE MASTER KEY.
This video illustrates how to detach and re attach a Database file in Microsoft SQL Server 2008 and along with that. Attach SQL Database Without Log File - Duration: 3:27.
For more information, see CREATE MASTER KEY (Transact- SQL) and ALTER MASTER KEY (Transact- SQL). The requirement for attaching log files depends partly on whether the database is read- write or read- only, as follows: For a read- write database, you can usually attach a log file in a new location. However, in some cases, reattaching a database requires its existing log files.
Therefore, it is important to always keep all the detached log files until the database has been successfully attached without them. If a read- write database has a single log file and you do not specify a new location for the log file, the attach operation looks in the old location for the file. If it is found, the old log file is used, regardless of whether the database was shut down cleanly.
However, if the old log file is not found and if the database was shut down cleanly and has no active log chain, the attach operation attempts to build a new log file for the database. If the primary data file being attached is read- only, the Database Engine assumes that the database is read- only. For a read- only database, the log file or files must be available at the location specified in the primary file of the database.
A new log file cannot be built because SQL Server cannot update the log location stored in the primary file. In This Section: Metadata Changes on Attaching a Database. When a read- only database is detached and then reattached, the backup information about the current differential base is lost.
The differential base is the most recent full backup of all the data in the database or in a subset of the files or filegroups of the database. Without the base- backup information, the master database becomes unsynchronized with the read- only database, so differential backups taken thereafter may provide unexpected results.
Therefore, if you are using differential backups with a read- only database, you should establish a new differential base by taking a full backup after you reattach the database. For information about differential backups, see Differential Backups (SQL Server). On attach, database startup occurs. Generally, attaching a database places it in the same state that it was in when it was detached or copied. However, attach- and- detach operations both disable cross- database ownership chaining for the database.
For information about how to enable chaining, see cross db ownership chaining Server Configuration Option. Also, TRUSTWORTHY is set to OFF whenever the database is attached. For information about how to set TRUSTWORTHY to ON, see ALTER DATABASE (Transact- SQL). Backup and Restore and Attach. Like any database that is fully or partially offline, a database with restoring files cannot be attached.
If you stop the restore sequence, you can attach the database. Then, you can restart the restore sequence. Attaching a Database to Another Server Instance. Important. A database created by a more recent version of SQL Server cannot be attached in earlier versions. When you attach a database onto another server instance, to provide a consistent experience to users and applications, you might have to re- create some or all of the metadata for the database, such as logins and jobs, on the other server instance. For more information, see Manage Metadata When Making a Database Available on Another Server Instance (SQL Server).