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SQL is a query based language that is used to manipulate data stored in a database while other languages process data.
Joins refer to the combination of related records to form a relation . There are six types of joins in database . Types of joins are cross join, natural join , right join , left join ,Inner join, Outer join.INNER JOINOUTER JOINLEFT JOINRIGHT JOINNATURAL JOINCROSS JOINIn special cases a table can join to itself (SELF JOIN)
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The SQL order allows a result set with rows being sorted by the values of one or more columns. At the present time it is the only known way to sort the rows in the result. It will also prevent the database system fro returning the rows in any order.