While JavaRanch will help you with issues you are having, I wouldn;t just ask overly general questions and expect results. We have a JDBC tutorial on hand for such questions and as Muhammad pointed, you can always try google.
Kiran, What we can do is point you in the direction of an appropriate tutorial. A BLOB is a binary large object. Both images and videos meet the criteria for this datatype. You'll want to look at the JDBC tutorial section on BLOBs.