Share SQLite with today extension not working

I am working on widget app. I am totally new to Today Extension. I want share data between app and today extension. I have created one database. I have 4 tables in that database. I found this code to create database for App Groups :

NSString *appGroupId = @"group.amar.TodayExtensionSharingDefaults";
    NSURL *appGroupDirectoryPath = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:appGroupId];
    dataBaseURL = [appGroupDirectoryPath  URLByAppendingPathComponent:@"widget.sqlite"];
    NSLog(@"dataBaseURL %@", dataBaseURL);

It worked. My SQLite file has been created. But It does't show my tables. It shows empty database. I don't have any idea about it. Please help.