Join in SQL is again important topic in database. The good thing about this topic is that we all know about it but even after that we do mistake in explaining it. We know all the definitions, all types of join then also we are not clear about it . The reason I can say is instead of being application minded we restrict ourselves only to the content. If I think about the audience of this article I can assume that it is definitely going to help college students but its also beneficial to people who are working on database in MNCs.