Explore topic-wise MCQs in Structured Query Language (SQL).

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Structured Query Language (SQL) knowledge and support exam preparation. Choose a topic below to get started.

1.

What is meaning of “REFERENCES” in table definition?$#

A. Primary key
B. NULL
C. Foreign Key
D. A ”foreign Key” belong to this particular table
Answer» B. NULL
Discussion
2.

Which among the following are the correct definitions for “NULL” in Mysql?$

A. Absence of value
B. Unknown
C. Empty set
D. All of the mentioned
Answer» E.
Discussion
3.

Which data type character merge the “Check Constraint” into a data type definition?$

A. ENUM
B. ENUM1
C. ENUM2
D. None of the mentioned
Answer» B. ENUM1
Discussion
4.

Which among the following is the correct syntax for defining “Constraint Check” in Mysql?$

A. gender char(1) check( gender IN (‘M’, ‘F’)),
B. gender char (1) check,
C. gender char (1) check ( gender ),
D. none of the mentioned
Answer» B. gender char (1) check,
Discussion
5.

Which command is used for the table definition in Mysql?

A. DESC table_name;
B. DESC table_name
C. DESC
D. None of the mentioned
Answer» B. DESC table_name
Discussion
6.

What is the role of “CONSTRAINS” in defining a table in Mysql?$

A. Declaring primary key
B. Declaring Foreign Key
C. Restrictions on columns
D. All of the mentioned
Answer» E.
Discussion
7.

Which among the following is the correct syntax for creating table?

A. CREATE TABLE name;
B. CREATE name;
C. CREATE TABLE
D. All of the mentioned
Answer» B. CREATE name;
Discussion