--Compressed log and database file size

Data | database | compression
--Compressed log and database file size

/*--Special attention
Please follow the steps and do not follow the steps above.
Otherwise, you may damage your database.
--*/

1. Empty log
DUMP TRANSACTION Library name with NO_LOG

2. Truncate the transaction log:
BACKUP LOG database name with NO_LOG

3. Shrink the database file (if not compressed, the database file will not be reduced
Enterprise Manager--right--the database you want to compress--all tasks--shrink the database--Shrink the file
--Select Log file--in the shrinkage method to choose to shrink to XXM, here will give a allow to shrink to the minimum m number, directly enter this number, you can determine
--Select the data file--in the contraction way to choose to shrink to XXM, here will give a allow to shrink to the minimum m number, directly enter this number, OK

You can also use SQL statements to complete
--Shrinking the database
DBCC shrinkdatabase (Customer information)

--Shrink the specified data file, 1 is the file number, you can query through this statement: SELECT * from Sysfiles
DBCC Shrinkfile (1)

4. In order to maximize the reduction of log files (if it is SQL 7.0, this step can only be done in Query Analyzer)
A. Detaching a database:
Enterprise Manager--server--database--right key--detach database

B. Delete log files on my Computer

C. Additional databases:
Enterprise Manager--server--database--right Key--additional database

This method will generate a new log with a size of more than 500 k

or in code:
The following example separates pubs and attaches a file in pubs to the current server.

A. Separation
EXEC sp_detach_db @dbname = ' pubs '

B. Deleting a log file

C. Additional
EXEC sp_attach_single_file_db @dbname = ' pubs ',
@physname = ' c:\Program Files\Microsoft SQL Server\mssql\data\pubs.mdf '

5. In order to be able to automatically shrink later, do the following settings:
Enterprise Manager--server--right key database--Properties--Options--select "Auto Shrink"

--sql Statement setting:
EXEC sp_dboption ' database name ', ' autoshrink ', ' TRUE '

6. If you want to not let it grow too big log
Enterprise Manager--server--right key database--attribute--transaction log
--Limit file growth to XM (x is the maximum data file size you allow)

How the--sql statement is set:
ALTER DATABASE name modify file (name= logical filename, maxsize=20)