Given a TABLE, in this TABLE, it prints entry of the table. If table is empty then it gives NULL.
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.
SELECT IFNULL( (SELECT NAME from employee where id = 2), 'NULL') as NAME;
SELECT IFNULL( (SELECT NAME from employee where id = 5), 'NULL') as NAME;
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