Automating Transaction Log Backups for All SQL Server Databases

With the use of T-SQL you can generate your transaction log backups and with the use of cursors you can cursor through all of your databases to back them up one by one. With the use of the DATABASEPROPERTYEX function we can also just address databases that are either in the FULL or BULK_LOGGED recovery model since you can not issue transaction log backups against databases in the SIMPLE recovery mode.

Here is the script that will allow you to backup the transaction log for each database within your instance of SQL Server that is either in the FULL or BULK_LOGGED recovery model.

You will need to change the @path to the appropriate backup directory and each backup file will take on the name of "DBname_YYYDDMM_HHMMSS.TRN".

DECLARE @name VARCHAR(50) -- database name   DECLARE @path VARCHAR(256) -- path for backup files   DECLARE @fileName VARCHAR(256) -- filename for backup   DECLARE @fileDate VARCHAR(20) -- used for file name  SET @path = 'C:\Backup\'   SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112)     + '_'     + REPLACE(CONVERT(VARCHAR(20),GETDATE(),108),':','') DECLARE db_cursor CURSOR FOR   SELECT name  FROM master.dbo.sysdatabases  WHERE name NOT IN ('master','model','msdb','tempdb')     AND DATABASEPROPERTYEX(name, 'Recovery') IN ('FULL','BULK_LOGGED') OPEN db_cursor    FETCH NEXT FROM db_cursor INTO @name    WHILE @@FETCH_STATUS = 0    BEGIN           SET @fileName = @path + @name + '_' + @fileDate + '.TRN'          BACKUP LOG @name TO DISK = @fileName          FETCH NEXT FROM db_cursor INTO @name    END    CLOSE db_cursor    DEALLOCATE db_cursor

In this script we are bypassing the system databases, but these could easily be included as well. You could also change this into a stored procedure and pass in a database name or if left NULL it backups all databases. Any way you choose to use it, this script gives you the starting point to simply backup all of your databases.

Next Steps

• Add this script to your toolbox
• Modify this script and make it a stored procedure to include one or many parameters
• Create a scheduled task to backup your transaction logs on a set schedule
• Take a look at this tip that does FULL backups for all databases.