Given a TABLE, in this TABLE, it prints entry of the table. If table is empty then it gives NULL.

Examples:

QUESTION : Given an employee table, print name from the given table which id equals to 2.

Output : Geek2

QUESTION : Given same Employee table, print name from the given table which id equals to 5.
Output : NULL

Approach: In this case, we use here IFNULL. IFNULL print the null if the table is an empty or other condition.

Query:-

SELECT 
IFNULL(
  (SELECT NAME 
  from employee
  where id = 2),
  'NULL') as NAME;

Output:-
Geek2

Query:-

SELECT 
IFNULL(
  (SELECT NAME 
  from employee
  where id = 5),
  'NULL') as NAME;

Output:-
NULL