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  • Eliminating Duplicates using Distinct Keyword

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    DISTINCT Keyword:

    It is used to fetch different values from a table. It removes duplicate records from the result set and used when there can be multiple duplicate tuples in a table.


    SELECT DISTINCT columnname FROM tablename;


    The below query will fetch different name and salary from Employee table as it will not return duplicate names.

    SELECT DISTINCT(name),salary FROM Employee;
    Name Salary
    ---------- ----------
    Sam 25000
    Ashley 35000
    Robert 25000
    Chris 25000

    As we can see from the above example no duplicate names are fetched from the table just because of DISTINCT keyword used with name column.

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