SQL MCQ

CORRECT
Which one of the following sorts rows in SQL?
SORT BY
ALIGN BY
ORDER BY
GROUP BY
CORRECT
Which of the following is NOT a SQL constraint?
PRIMARY KEY
ALTERNATE KEY
FOREIGN KEY
UNIQUE
CORRECT
Write an SQL query to find names of employee starting with ‘A’? Table name: Employee and
column name: EmpName
select *
from Employee
where EmpName like 'a%';
CORRECT
There is an error in the query given below. How can we correct it?
SELECT subject_code, AVG (marks)
FROM students
WHERE AVG(marks) > 75
GROUP BY subject_code;
select subject_code,avg(marks)
from students
group by subject_code
having avg(marks)>75
CORRECT
What are different types of joins in SQL?
inner join
left outer join/left join
right outer join/right join
full outer join/full join
cartesian product/cross join
self join
CORRECT
Which data type can store unstructured data in a column?
RAW
CHAR
NUMERIC
VARCHAR
CORRECT
The SQL wildcards are ____ and ____ .
asterisk (*); percent sign (%)

percent sign (%); underscore (_)
underscore(_); question mark (?)
question mark (?); asterisk (*)
CORRECT
What are the different types of SQL commands?
DDL - data definition language

dml - data manipulation language
tcl - transaction control language
dcl - data control language
CORRECT
What are different types on constraints in SQL?
NOT NULL
UNIQUE
PRIMARY KEY
FOREIGN KEY
CHECK
DEFAULT
WRONG
The command used to delete a particular column in a relation is [DELETE

COLUMN (ALTER DROP)]
CORRECT
What is the full form of DDL?
Dynamic Data Language

Detailed Data Language
Data Definition Language
Data Derivation Language
CORRECT
A database language used for defining the whole database structure and schema is called:
DCL
DML
DDL
ALL OF THE ABOVE
CORRECT
Which data manipulation command is used to combine the records from one or more
tables?
SELECT
JOIN
PROJECT
PRODUCT
WRONG
What is the sequence of execution of below query:
SELECT DISTINCT column, AGG_FUNC(column_or_expression), …
FROM mytable
JOIN another_table
ON mytable.column = another_table.column
WHERE constraint_expression
GROUP BY column
HAVING constraint_expression
ORDER BY column ASC/DESC
LIMIT count OFFSET COUNT;
 FROM
 JOIN [WHERE]
 WHERE [JOIN]
 GROUP BY
 HAVING [SELECT]
 ORDER BY [HAVING]
 LIMIT [ORDER BY]
 SELECT [LIMIT]
CORRECT
What is the meaning of '%0%0%'
Feature begins with two 0's

Feature ends with two 0's
Feature has more than two 0's
Feature has two 0's in it, at any position
CORRECT
.A SQL query automatically eliminates duplicates (True / False) ?
TRUE
FALSE
CORRECT
What’s wrong in the following query?
SELECT subject_code, count(name)
FROM students;
SELECT subject_code , count(name)

from students
group by subject_code
order by subject_code
CORRECT
Which operator is used to compare a value to a specified list of values?
BETWEEN
ANY
IN
ALL
CORRECT
The COUNT function in SQL returns the number of [VALUES]
CORRECT
The SQL keyword [LIKE Only] is used with wildcards.
CORRECT
Which function is used to divides one numeric expression by another and get the
remainder?
POWER
MOD
ROUND
REMAINDER
CORRECT
DCL provides commands to perform actions like
Change the structure of Tables

Insert, Update or Delete Records and Values
Authorizing Access and other control over Database
None of Above
CORRECT
The virtual table that is created by data from the result of an SQL 'Select' statement is called
[VIEW]
CORRECT
How is UNION ALL different from UNION?

UNION removes duplicate rows whereas UNION ALL does not
UNION has to perform distinct sort to remove duplicates. which makes it less faster than
UNION ALL
CORRECT
Which statement in SQL allows us to change the definition of a table is?
ALTER
UPDATE
CREATE
SELECT
WRONG
Which of the following is a comparison operator in SQL?
Double equal sign ( == )

LIKE
BETWEEN
Single equal sign ( = )
CORRECT
Which of the following is not a valid SQL type?
DECIMAL
NUMERIC
FLOAT
CHARACTER
CORRECT
Which of the following is a legal expression in SQL?
SELECT NULL FROM SALES;

SELECT NAME FROM SALES;
SELECT * FROM SALES WHEN PRICE = NULL;
SELECT # FROM SALES;

SQL MCQ

Uploaded by

Copyright:

Available Formats

SQL MCQ

Uploaded by

Document Information

Original Description:

Original Title

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

SQL MCQ

Uploaded by

Copyright:

Available Formats

CORRECT

Which one of the following sorts rows in SQL?

Which of the following is NOT a SQL constraint?

SELECT subject_code, AVG (marks)

WHERE AVG(marks) > 75

What are different types of joins in SQL?

Which data type can store unstructured data in a column?

The SQL wildcards are ____ and ____ .

asterisk (*); percent sign (%)

What are the different types of SQL commands?

DDL - data definition language

What are different types on constraints in SQL?

The command used to delete a particular column in a relation is [DELETE

What is the full form of DDL?

Dynamic Data Language

What is the sequence of execution of below query:

SELECT DISTINCT column, AGG_FUNC(column_or_expression), …

ORDER BY column ASC/DESC

LIMIT count OFFSET COUNT;

 LIMIT [ORDER BY]

What is the meaning of '%0%0%'

Feature begins with two 0's

.A SQL query automatically eliminates duplicates (True / False) ?

What’s wrong in the following query?

SELECT subject_code, count(name)

SELECT subject_code , count(name)

Which operator is used to compare a value to a specified list of values?

The COUNT function in SQL returns the number of [VALUES]

The SQL keyword [LIKE Only] is used with wildcards.

DCL provides commands to perform actions like

Change the structure of Tables

How is UNION ALL different from UNION?

Which statement in SQL allows us to change the definition of a table is?

Which of the following is a comparison operator in SQL?

Double equal sign ( == )

Which of the following is not a valid SQL type?

Which of the following is a legal expression in SQL?

SELECT NULL FROM SALES;

You might also like

The SQL wildcards are and .