How to use index in select statement?

Question

Lets say in the employee table, I have created an index(idx_name) on the emp_name column of the table.

Do I need to explicitly specify the index name in

Answer 1

By using the column that the index is applied to within your conditions, it will be included automatically. You do not have to use it, but it will speed up queries when it is used.

SELECT * FROM TABLE WHERE attribute = 'value'

Will use the appropriate index.