If multiple columns are used as Primary Key, it is known as
Unique
Composite
Foreign
None of the above
Correct Answer :
B. Composite
If multiple columns are used as Primary Key, it is known as Composite Key.
Related Questions
ROUND function consists of ___ parameters?
One
Two
Three
Four
In the case of ____ Independence Rule, Physical independence of data to access the database is a requirement for a database or an application.
Physical Data
Logical Data
Integrity
Distribution
What does the DELETE Statement do?
A new table in SQL is created using this SQL statement.
By deleting the stored data, this SQL statement deletes the database.
Columns in the SQL database can be created, deleted, or modified with this SQL statement.
By executing this SQL statement, you remove the table and all the information that it contains, including the structure, views, permissions, and triggers.
Which of the following is NOT the SQL Arithmetic Operator?
Addition
Subtraction
Unary
Modulus
Which of the following is/are Scalar function(s)?
UCASE()
MID()
ROUND()
All of the above
Command that comes under DML is/are
ROLLBACK
GRANT
UPDATE
All of the above
Commands that comes under DDL is/are
CREATE
DROP
TRUNCATE
All of the above
In order to build a link between two tables, which key is used?
Primary
Foreign
Composite
Unique
Select the correct constraint in SQL?
NOT NULL
CHECK
DEFAULT
All of the above
From the set of results, in order to remove the duplicate columns, ____ Clause is used.
DUPLICATE
DISTINCT
REMOVE
DROP
_____ variables are not supported by SQL Script.
Bind
Dynamic
Both A) and B)
None of the above
To rename the Index, we need to use which command?
RENAME
ALTER
UPDATE
ADD
Choose the correct syntax of NOW function?
SELECT ()NOW;
NOW() SELECT;
SELECT NOW();
SELECT OWN();
SET Operators are used to
Compile the results from two queries
Compile the results from three queries
Compile the results from four queries
Compile the results from five queries
SQL contains which component in its process?
Optimization Engines
SQL Query Engines
Query Dispatchers
All of the above
What is meant by 'SQL is an interactive language'?
Learning and understanding SQL is easy
It can also be used for communicating with the database.
In a few seconds, complex queries can also be answered using this language.
All of the above
In CRUD Operator, U is an acronym of
Upper
Unique
Update
Uppercase
What does SQL is used to perform operations on?
Update Records
Insert Records
Both A and B
None of the above
Which of the following is not MySQL String Data Type?
TEXT(Size)
TINYTEXT
MEDIUMTEXT
LARGETEXT
What is the symbol of Concatenation Operator?
|
||
//
\
Command that comes under DCL is/are -
GRANT
REVOKE
Both A. and B.
None of the above
In SQL SELECT COUNT, one needs to specify the
Column Name
Row Name
Table Name
None of the above
Following the completion of a transaction, it must be executed to save all the operations performed in the transaction. Here we are talking about which command?
REVOKE
COMMIT
ROLLBACK
SAVE
Select the correct statement which will return all the rows from the Table and then also deletes the Table_Add table?
SELECT * FROM Table; DROP TABLE Table_Add
SELECT * WHERE Table; DROP TABLE Table_Add
SELECT * FROM Table; DELETE TABLE Table_Add
SELECT * WHERE Table; DELETE TABLE Table_Add
An SQL ____ is a virtual table, whose contents are based on the SQL statement's results.
Concatenate
Virtual
View
None of the above
In order to manage or store the data in the database, WEB SQL Database is used which is a
Web site
Web page
Web browser
None of the above
____ integrity is achieved by using a foreign key.
Referential Integrity
Domain Integrity
User-defined Integrity
Entity Integrity
What does the DROP INDEX Statement do?
By running this SQL statement, the transaction will be undone and the operations not yet saved to the SQL database will be undone.
The SQL database table's index is deleted using this SQL statement.
An index is created in a SQL database table with this SQL statement.
An existing SQL database is selected with this SQL statement. A database must be selected from several existing databases before you can perform operations on the table.
What does the SELECT Statement do?
Data is read from the SQL database by this statement and displayed to the database user.
The stored data in the SQL database is changed or modified by this SQL statement.
By deleting the stored data, this SQL statement deletes the database.
A new table in SQL is created using this SQL statement.
In the relational database, in order to modify index, we need to use which command?
ALTER
MODIFY
UPDATE
ADD