In order to remove a primary key constraint, which clause is used?
DELETE
DROP
ALTER
REMOVE
Correct Answer :
B. DROP
In order to remove a primary key constraint, DROP clause is used.
Related Questions
What is the functionality of UCASE function?
To change the case of the string to lowercase characters.
To change the case of the string to uppercase characters.
To change the case of the string to numeric characters.
To change the case of the string to symbolic characters.
A Sub query is an SQL expression that is placed ____ another SQL statement.
Before
After
Inside
Outside
In order to format, how the column should be displayed, which function is used?
FORM()
DISPLAY()
COL()
FORMAT()
Commands that come under TCL is/are -
COMMIT
ROLLBACK
SAVEPOINT
All of the above
At which of the following stage does SQL Injection occurs?
When the user is asked to logout
When the user is asked to input password
When the user is asked to input captcha
When the user is asked to input username
Temporary variables use ____ resources than table variables.
More
Less
Equal
None of the above
Which of the following is/are transaction control commands in SQL?
Commit
Rollback
Both A. and B.
None of the above
Numbers of operand used by Binary Operators are?
1
2
3
4
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;
What does the CREATE DATABASE Statement do?
Columns in the SQL database can be created, deleted, or modified with this SQL statement.
The table, its structure, views, permissions, and triggers will also be deleted or removed with this SQL statement.
In the database management system, this SQL statement deletes the existing database, together with all the database tables and views.
A new database will be created through this SQL statement.
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.
Through which system, we can detect SQL Injection attacks?
Injection Detection System
Attack Detection System
Intrusion Detection System
None of the above
Which of the following statement is FALSE?
A Primary Key cannot be NULL
A Foreign Key cannot be NULL
A Primary Key cannot be Duplicate
A Foreign Key can be Duplicate
All other columns other than the column which is termed as Primary Key, are known as
Unique Keys
Alternate Keys
Composite Keys
None of the above
Which statement is TRUE about the ORDER BY Clause?
In order to return the rows in a specific order, ORDER BY Clause is used.
In order to group the rows, ORDER BY Clause is used.
In order to select the defined groups, ORDER BY Clause is used.
None of the above
Description allows the Script to load the
Owner of the script
Script name
Script Editor
All of the above
The ____ size of the result is shown by Script Quota.
Minimum
Maximum
Average
None of the above
C in CRUD Operator means
To add or insert data
To retrieve or fetch data
To update the data
To delete the data
In order to remove an index, we need to use which command?
REMOVE
DELETE
DROP
DEL
What is the difference between nvarchar and ntext?
nvarchar is fixed and ntext is variable.
nvarchar is variable and ntext is fixed.
nvarchar can be of the maximum size upto 4000 characters and ntext can be of the maximum size upto 2GB of the text data.
nvarchar can be of the maximum size upto 4000 characters and ntext can be of the maximum size upto 1GB of the text data.
Which of the following is TRUE about UNIQUE constraint?
In columns that are subject to the UNIQUE constraint, duplicate values are not allowed.
Unique values will always be present in the column containing the unique constraint.
A single table can have more than one unique constraint, since it can be applied to more than one column.
All of the above
What does the DESCRIBE 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.
By executing this SQL statement, all records in the SQL database will be deleted.
Specify the columns of the table in this SQL statement to return distinct values.
The data specified in this table or view is reported in this SQL statement.
What does the CREATE INDEX Statement do?
An index is created in a SQL database table with this SQL statement.
Changes made in the SQL database transaction are permanently saved using this SQL statement.
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.
In case the CTE is wrong, it goes into
Infinite Loop
Null State
False State
True State
What does the TRUNCATE TABLE Statement do?
In the database management system, this SQL statement deletes the existing database, together with all the database tables and views.
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.
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.
Select the correct method of Web SQL?
Execute SQL
Transaction
Open Database
All of the above
Difference between GRAND & REVOKE command is/are?
The GRANT command can be used to grant a user access to databases and tables whereas The REVOKE command can be used to revoke all access privileges already assigned to the user.
The REVOKE command can be used to grant a user access to databases and tables whereas The GRANT command can be used to revoke all access privileges already assigned to the user.
A transaction can be rolled back to its last saved state.
None of the above
____ are the columns for the retrieval purpose.
Tables
WHERE Conditions
Expressions
None of the above
Which of the following statement is correct?
Comparison Operator has higher precedence than Conjuction Operator.
Identity Operator has higher precedence than Multiplication Operator.
Both A and B
None of the above
What will be the output of the below SQL statement?
2021-10-06 00:00:00.000
2021-10-06
2021 OCT 06
06-10-2021