join : to join one or more than one table which are ain relationship ex: Employee and Department data : Hari and Ram belongs to HR, Sam belongs to IT then you must have 2 tables for normalization Employee table ----------- EMPID Name DeptID 1 Hari 1 2 Sam 2 3 Ram 1 Department table --------------- Deptid DeptName 1 HR 2 IT Inner join : This join returns rows when there is at least one match in both the tables. Select * from employee e Inner join Department d on e.Deptid = d.deptid Outer join : LEft outer join, Right outer join and cross join for more details check this http://blog.sqlauthority.com/2009/04/13/sql-server-introduction-to-joins-basic-of-joins/

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What is joins & its type

vivek upadhyay

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