What is the work of DELETE command?
A single or multiple rows can be accessed using this command from one or more tables of a database. Using the WHERE clause with this command is also possible.
Database data can be updated or changed using this command.
Database objects such as tables, table views, and other objects can be deleted using this command.
Using this command, you can remove or erase recorded information from a database table.
Correct Answer :
D. Using this command, you can remove or erase recorded information from a database table.
Using DELETE command, you can remove or erase recorded information from a database table.
Related Questions
What does the INSERT INTO Statement do?
In this SQL statement, the data or records are inserted into an existing database table. One query statement can insert multiple records simultaneously using this statement.
A new database will be created through this SQL statement.
In the database management system, this SQL statement deletes the existing database, together with all the database tables and views.
By executing this SQL statement, all records in the SQL database will be deleted.
What is TRUE about SAVEPOINT?
Following the completion of a transaction, it must be executed to save all the operations performed in the transaction.
A transaction can be rolled back to its last saved state.
A specific part of a transaction can be given a name
None of the above
Which one if these is used to put the same value in all the rows?
Group by unique column
Group by single column
Group by one column
Group by same value
Which of the following is TRUE about Intrusion Detection System?
Intrusion Detection System is Network-based
Intrusion Detection System is Host-based
Both A) and B)
None of the above
In LIKE clause, to represent a single character, _____ is used.
-
_
!
&
In the case of the ____ Independence Rule, It shouldn't make a difference what the user sees (application) if the logical structure changes.
Physical Data
Logical Data
Integrity
Distribution
What does the following statement do?
Finds any values that start with or
Finds any value that contains only four characters and second, third characters are 'o', 'r'
Finds any values that have or in any position
None of the above
Which statement is not true?
SQL is rational whereas No-SQL is non-rational.
SQL follows BASE Model whereas No-SQL follows ACID Model.
SQL database are vertically scalable whereas No-SQL database are horizontally scalable.
No-SQL databases are preferable to store hierarchical data in comparison SQL databases.
What does UCASE() function do?
Converts database field to uppercase
Converts database field to lowercase
Returns the length of the text field
Returns the current date and time
By default, TIME data type stores time in which format?
MM:HH:SS;
SS:HH:MM;
HH:SS:MM;
HH:MM:SS;
How can we prevent SQL Injection attack?
We should pre-define the input type, input field and length of the user data to validate the input for the user authentication.
Access privileges should be restricted for the users
Administrator accounts should not be used.
All of the above
SQL CREATE DATABASE is used to,
Create a table
Create a database
Create a column
Create a row
Through which system, we can detect SQL Injection attacks?
Injection Detection System
Attack Detection System
Intrusion Detection System
None of the above
Determine the correct SQL command?
CREATE
UPDATE
DELETE
All of the above
What is TRUE about SQL EXCEPT clause?
The result is purged of duplicates
Duplicate records are not removed
Only one column can be compared by a clause
None of the above
Select the correct constraint in SQL?
NOT NULL
CHECK
DEFAULT
All of the above
Which of the following statement is correct for SQL Multiplication Operator?
SELECT Operand1+Operand2;
SELECT Operand1*Operand2;
SELECT Operand1**Operand2;
SELECT Operand1
How many temp tables are there?
1
2
3
4
Command that comes under DML is/are
ROLLBACK
GRANT
UPDATE
All of the above
Which of the statement is true?
The precedence-low operators are evaluated last in SQL.
The precedence-high operators are evaluated first in SQL.
Both A and B
None of the above
What is the work of CREATE command?
Using this command, you can remove or erase recorded information from a database table.
It enables you to create new databases, tables, table views, and other objects using this command.
Inserting records or data into the database tables is accomplished with this command. In addition to inserting records in single rows, we can insert records in multiple rows as well.
A single or multiple rows can be accessed using this command from one or more tables of a database. Using the WHERE clause with this command is also possible.
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.
Which syntax is correct for RENAME DATABASE in MySQL?
RENAME old_database_name TO new_database_name;
RENAME DATABASE old_database_name TO new_database_name;
ALTER old_database_name MODIFY NAME = new_database_name;
ALTER DATABASE old_database_name MODIFY NAME = new_database_name;
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
What does the DISTINCT Clause do?
Specify the columns of the table in this SQL clause to return distinct values.
By executing this SQL statement, all records in the SQL database will be deleted.
The data specified in this table or view is reported in this SQL statement.
Changes made in the SQL database transaction are permanently saved using this SQL statement.
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
Which function returns the correct date and time?
DATE()
NOW()
TIME()
DATETIME()
To get the table's previous permanent status, use the ____ command.
Commit
Transaction
Rollback
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
Which of the following clause is optional in SQL SELECT Statement?
SELECT
FROM
HAVING
None of the above