The ability to combine resultsfrom related rows from multiple tables is an important part of relational database system design.In SQL Server, this is accomplished with the SQL join clause. It’s the nature of traditional relational database systems where some table contains informationrelated to other tables with a common key value.Using a SQL join, you can easily perform querieson related data-sets from multiple tables with these shared keys.
The aim of this article is to provide you withthe basic knowledge and examples that you will need to use the SQL join effectivelyin any database environment.
Image may be NSFW.
Clik here to view.

Continue reading
SQL Joins