What will be the output of the following MySQL command?
SELECT fname
FROM person
WHERE emp_id != 6 OR emp_id IS NULL;
SELECT fname
FROM person
WHERE emp_id != 6 OR emp_id IS NULL;
A. Only those names whose emp_id is not equal to 6 or emp_id with NULL values
B. Only those names whose emp_id is not equal to 6
C. Only those names whose emp_id is equal to 6
D. None of the mentioned
Answer: Option A
Solution (By Examveda Team)
This MySQL command is used to retrieve the 'fname' (first name) from the 'person' table.Let's break down the WHERE clause:
* emp_id != 6: This condition selects all rows where the 'emp_id' is not equal to 6.
* emp_id IS NULL: This condition selects all rows where the 'emp_id' is NULL.
The OR operator combines these conditions, meaning the query will retrieve data if either of the conditions is true.
Therefore, the correct answer is Option A: Only those names whose emp_id is not equal to 6 or emp_id with NULL values.
Related Questions on MySQL Miscellaneous
How is communication established with MySQL?
A. SQL
B. Network calls
C. A programming language like C++
D. APIs
Which type of database management system is MySQL?
A. Object-oriented
B. Hierarchical
C. Relational
D. Network
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