{"id":26133,"date":"2024-11-10T17:14:46","date_gmt":"2024-11-10T17:14:46","guid":{"rendered":"https:\/\/www.testingdocs.com\/questions\/?p=26133"},"modified":"2025-01-10T03:10:16","modified_gmt":"2025-01-10T03:10:16","slug":"mysql-quiz-what-is-the-output-of-the-following-query","status":"publish","type":"post","link":"https:\/\/www.testingdocs.com\/questions\/mysql-quiz-what-is-the-output-of-the-following-query\/","title":{"rendered":"MySQL Quiz : What is the output of the following query?"},"content":{"rendered":"

What is the output of the following query?<\/h2>\n

mysql> SELECT IFNULL(NULLIF(5, 5), 10);<\/p>\n

A) 5
\nB) NULL
\nC) 10
\nD) Error<\/p>\n

 <\/p>\n

Correct Answer:<\/h2>\n

C) 10<\/p>\n

Explanation:<\/h2>\n

In this query:<\/p>\n

NULLIF(5, 5) returns NULL because both values are equal.
\nIFNULL(NULL, 10) returns 10 because the first argument is NULL.<\/p>\n

Hence, the output of the query is 10.<\/p>\n

mysql> SELECT IFNULL(NULLIF(5, 5), 10);
\n+————————–+
\n| IFNULL(NULLIF(5, 5), 10) |
\n+————————–+
\n| 10 |
\n+————————–+
\n1 row in set (0.01 sec)<\/p>\n

\"MySQL<\/p>\n

mysql> SELECT NULLIF(5,5)
\n-> ;
\n+————-+
\n| NULLIF(5,5) |
\n+————-+
\n| NULL |
\n+————-+
\n1 row in set (0.00 sec)<\/p>\n

mysql> SELECT IFNULL(NULL,10);
\n+—————–+
\n| IFNULL(NULL,10) |
\n+—————–+
\n| 10 |
\n+—————–+
\n1 row in set (0.00 sec)<\/p>\n

 <\/p>\n

MySQL Tutorials<\/h2>\n

MySQL Tutorials on this website:<\/p>\n