Let's us assume that we have the following table of Employee.
There can be a scenario we have to display employee name whose salary is greater than "some amount" or less than "some amount" for that purpose we use case statement.
Let's us consider that we have to display all the employee names from the employee table and the status like salary is greater than 13000 or lesser than 13000.
SELECT Emp_Name,CASE when (Emp_Salary>13000) then 'Greater than 13000' else 'Lesser than 13000' end as Status FROM Employee
|Shiv||Greater than 13000|
|Raju||Greater than 13000|
|Sham||Greater than 13000|
|Moosa||Lesser than 13000|
|Firoz||Lesser than 13000|
Hence you can see that all the employee name have been displayed with their salary status in the above output.
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