Select Query Optimization

Question

I have select query that fetch record based on a condition

Select * from Employee where EmpStatus=#EmpStatus#

The EmpStatus in the DB for each employee would either 0 or 1.

EmpID EmpName EmpStatus
***********************
1     Name1   0
2     Name2   0
3     Name4   1
4     Name5   1

When I pass EmpStatus as 1, I should get list containing ONLY 3 and 4. But if i pass EmpStatus as 0, ALL the 4 records should be fetched. How can this be done with a single optimal select query?

Answer 1

You could change = to >=:

SELECT * FROM Employee WHERE EmpStatus >= #EmpStatus#

The most important thing for performance is to add an appropriate index.