how to update image in sqlite database in ios?

I can insert image to sqlite database in BLOB format, while updating image, it storing nsdata in sqlite database.

Here is Update Query:

NSString* updateQuery = [NSString stringWithFormat:@"UPDATE MediaStorage SET media_content = '%@',name = '%@',type = '%@', extension = '%@',file_id = '%@',exp_id = '%@' WHERE ID = '%ld'",prjct.profileData,prjct.imgName,prjct.imgType,prjct.imgExtension,prjct.imgId,prjct.exp_id,(long)[prjct.imgId integerValue]];