In general, MSSQL Server database or file shrinking
should be handled carefully. Shrinking operations can lead to fragmentation
and, in some cases, performance issues. Proactively managing database size is
frequently preferable to repeatedly doing shrinking operations. However, there
may be specific scenarios where shrinking is necessary due to temporary data
growth.
Use below Script to Shrink log files
USE YOURDATABASENAME
GO
--
Truncate the log by changing the database recovery model to SIMPLE.
ALTER DATABASE YOURDATABASENAME
SET RECOVERY SIMPLE;
GO
--Shrink
the truncated log file to 10 MB.
DBCC SHRINKFILE (YOURDATABASENAME_log, 10);
GO
-- Reset
the database recovery model.
ALTER DATABASE YOURDATABASENAME
SET RECOVERY FULL;
GO
In SQL Server, you can shrink a database and its
files as follows:
Shrinking a Database:
The DBCC SHRINKDATABASE command can be used to
reduce the size of a whole database:
USE [YourDatabaseName]
GO
--
Shrinks the entire database
DBCC SHRINKDATABASE;
Enter the name of your database in place of
YourDatabaseName. The main objective of this process is to shrink the size of
all log files and data in the given database.
Shrinking a Database File:
To shrink specific database files, you can use the DBCC
SHRINKFILE command:
USE YourDatabaseName;
GO
--
Shrinks a specific data file
DBCC SHRINKFILE('YourDataFileName', target_size_in_MB);
Replace YourDatabaseName with the name of
your database, YourDataFileName with the logical name of the data file
you want to shrink, and target_size_in_MB with the desired target size
for the file in megabytes.
Remember that shrinking operations can
be resource-intensive and may impact database performance. It's generally
recommended to size your database appropriately and monitor its growth rather
than relying on frequent shrinking.
Important Considerations:
1.
Fragmentation:
Shrinking operations can lead to file fragmentation. It's recommended to
rebuild indexes after shrinking to address fragmentation.
2.
Scheduled Jobs:
Frequent shrinking should be avoided. If you find that your database size grows
and needs to be managed, consider adjusting your data and log file size
settings or implement a maintenance plan.
3.
Backup:
Always perform a full database backup before attempting shrinking operations.
4.
Database in Use:
Avoid shrinking a database or files while the database is in use. Choose a
maintenance window or a time when the database load is minimal.
How to Rebuild all Indexes in a table
USE
YourDatabaseName
GO
--Rebuild all indexes
ALTER INDEX ALL ON YourTableName REBUILD;
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