plss give me your valuable suggestions.....
i'm on a project for developing a DBMS with SQL interpreter,in java, using netbeans6.7...the interpreter interprets only some queries like create,select,insert,update&delete...for this i need 2 create database...i prefer 2 save database as a text file & 2 perform operations in the txt file..

but how would i save database(data) in text file so i could easily perform those operations...
plsss help meeeee....give me your valuable suggestions

use a binary format. Text is way too cumbersome for what you're trying to do.
And you will want to have a separate file per table most likely, probably more files for indexing and stuff like that.