Explore topic-wise MCQs in Mysql.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Mysql knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following WHERE clauses is faster?
1. WHERE col * 3 < 9
2. WHERE col < 9 / 3
A. 2
B. dependent on operating system
C. 1
D. same speed
E. None of these
Answer» B. dependent on operating system
Discussion
2.

What are the results of the following queries if col is an integer column?
1. SELECT * FROM student WHERE id = '6';
2. SELECT * FROM student WHERE id = 6;
A. 1 is an error
B. 2 is an error
C. same
D. different
E. None of these
Answer» D. different
Discussion
3.

Find the error
CREATE TABLE Employee
 (Employee_id SMALLINT, name VARCHAR, LAST VARCHAR, Bith_date DATE
 CONSTRAINTS pk_Employee PRIMARY KEY (Employee_id));
 INSERT INTO Employee
 VALUES(Employee_id, name, LAST, Birth_date)
 (1, s , p , 24-1991-01);
A. No error
B. Any other error
C. In correct data value
D. All of above
E. None of these
Answer» D. All of above
Discussion
4.

Find the error?
CREATE TABLE Employee
( Employee_id SMALLINT, name VARCHAR, LAST VARCHAR
 CONSTRAINTS pk_Employee PRIMARY KEY (Employee_id));
 INSERT INTO Employee
 VALUES( Employee_id, name, LAST)
 (1,  s ,  p );
 INSERT INTO person
 ( Employee_id, name, LAST)
 VALUES(1, s , p );
A. Error, Duplicate value
B. Any other error
C. No error
D. All of above
E. None of these
Answer» B. Any other error
Discussion
5.

Find the error

A. No error
B. Any other error
C. In correct data value
D. All of above
E. None of these
Answer» D. All of above
Discussion
6.

Which of the following are the valid database datatypes in Mysql?

A. Temporal
B. Text
C. Numerical
D. All of above
E. None of these
Answer» E. None of these
Discussion
7.

To perform analysis of key values by the server, the statement used is __________.

A. PERFORM ANALYSIS
B. ANALYZE KEYS
C. PERFORM TABLE ANALYSIS
D. ANALYZE TABLE
E. None of these
Answer» E. None of these
Discussion
8.

What are the results of the following queries if col is an integer column?

A. 1 is an error
B. 2 is an error
C. same
D. different
E. None of these
Answer» D. different
Discussion
9.

Which of the following WHERE clauses is faster?

A. 2
B. dependent on operating system
C. 1
D. same speed
E. None of these
Answer» B. dependent on operating system
Discussion