SQL SERVER database shrinking and batch shrinking

Stored procedure method

The code is as follows:

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DECLARE @ name VARCHAR (25) DECLARE @ SQL VARCHAR (1000) DECLARE @ logid INT DECLARE sysdatabase_name cursor for select name FROM master. dbo. sysdatabases OPEN sysdatabase_name Fetch next from sysdatabase_name INTO @ name WHILE @ FETCH_STATUS = 0 BEGIN IF (@ name not in ('XXX ')) BEGIN SET @ SQL = 'Clare @ logid INT USE ['+ @ name +'] SELECT @ logid = fileid FROM sysfiles where right (rtrim (filename), 3) = "ldf" Backup log ['+ @ name +'] WITH NO_LOG Dbcc shrinkfile (@ logid )' EXEC (@ SQL) END Fetch next from sysdatabase_name INTO @ name END CLOSE sysdatabase_name DEALLOCATE sysdatabase_name

Another method is that this may be more suitable for beginners.

1. Clear logs
Dump transaction database name WITH NO_LOG
2. Truncate transaction logs:
Backup log database name WITH NO_LOG
3. Compress database files (if not compressed, the database files will not be reduced
Enterprise Manager -- right-click the database you want to compress -- all tasks -- contract database -- contract file
-- Select Log File -- select to shrink to XXM in the contraction mode. Here, a minimum number of MB allowed to shrink is displayed. Enter

Number. OK.
-- Select data file -- select to shrink to XXM in the contraction mode. Here, a minimum number of MB allowed to shrink is displayed, and you can directly enter this

Number. OK.
You can also use SQL statements to complete
-- Shrink database
Dbcc shrinkdatabase (customer profile)
-- Contract the specified data file. 1 is the file number. You can use this statement to query: select * from sysfiles
Dbcc shrinkfile (1)
4. To minimize log files (for SQL 7.0, this step can only be performed in the query analyzer)
A. Separate the database:
Enterprise Manager -- Server -- database -- right-click -- detach database
B. Delete LOG files in my computer
C. Additional database:
Enterprise Manager -- Server -- database -- right-click -- attach database
This method generates a new LOG with a size of more than 500 K.
Or use the code:
The following example separates pubs and attaches a file in pubs to the current server.
A. Separation
E x e c sp_detach_db @ dbname = 'pubs'
B. Delete log files
C. Attach
E x e c sp_attach_single_file_db @ dbname = 'pubs ',
@ Physname = 'C: Program FilesMicrosoft SQL ServerMSSQLDatapubs. mdf'
5. In order to automatically contract in the future, make the following settings:
Enterprise Manager -- Server -- right-click database -- property -- option -- Select "auto contract"
-- SQL statement setting method:
E x e c sp_dboption 'database name', 'autowrite', 'True'
6. If you want to prevent the log from increasing too much in the future
Enterprise Manager -- Server -- right-click database -- properties -- Transaction log
-- Limit file growth to xM (x is the maximum data file size you allow)
-- SQL statement settings:
Alter database name modify file (name = logical file name, maxsize = 20)
Note:
Follow these steps. Do not follow these steps.
Otherwise, your database may be damaged.
Generally, steps 4 and 6 are not recommended.
Step 3 is not safe, and may damage the database or lose data
If the log reaches the upper limit in step 1, the subsequent database processing will fail and the log can be restored after being cleared.

In addition, we provide a simpler method, which I have tried and tried repeatedly. We recommend that you use it.
Simpler method:
1. Right-built database properties window-fault recovery model-set to simple
2. Right-built database all tasks-shrink database
3. Right-built database properties window-fault recovery model-set as large-capacity log records