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মঙ্গলবার, ৭ জানুয়ারী, ২০১৪

Using the ALTER DATABASE Command



Using the ALTER DATABASE Command
Log files or log file groups can be added or modified with the ALTER DATABASE command, as shown on Day 6. I prefer the command-line utilities because they can be scripted, and as such are a permanent record that can be used over and over again. An example of how to use the ALTER DATABASE command to add a log file is shown here:
ALTER DATABASE database
ADD LOGFILE ( `log3a', `log3b' ) SIZE 10M;
To add a new log file to an already existing group, you can use this command:
ALTER DATABASE database
ADD LOGFILE MEMBER `log3c' TO GROUP 3;
If you don't know the group name, you can use the same command and specify the other members of the log file group, as in
ALTER DATABASE database
ADD LOGFILE MEMBER `log3c' TO GROUP ( `log3a', `log3b');
As I have said before, by using a SQL script and the ALTER DATABASE command, you can preserve a permanent record of the change and then use the file as a template for other, similar operations. 

Thank you
Asraful

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