What is the difference between VARCHAR and VARCHAR2?
VARCHAR can store upto 4000 bytes and VARCHAR2 can store upto 8000 bytes.
VARCHAR can store upto 2000 bytes and VARCHAR2 can store upto 4000 bytes.
Both VARCHAR and VARCHAR2 are similar but use of VARCHAR2 is mostly recommended.
There is no similarity between VARCHAR and VARCHAR2.
Correct Answer :
C. Both VARCHAR and VARCHAR2 are similar but use of VARCHAR2 is mostly recommended.
Both VARCHAR and VARCHAR2 are similar but use of VARCHAR2 is mostly recommended.
Related Questions
Which of the following is not a SQL Logical Operator?
SQL Equal Operator
SQL ANY Operator
SQL BETWEEN Operator
SQL IN Operator
Which clause is used to retrieve a unique element from the table?
SELECT UNIQUE
SELECT DISTINCT
Both A) and B)
None of the above
In the case of ____ Independence Rule, if using the SQL queries language to insert data into table's cells, the database must maintain integrity independence.
Interdependent
Intradependent
Integration
Integrity
What does the DROP DATABASE Statement do?
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.
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.
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
In how many parts are the SQL functions are divided into?
1
2
3
4
Which of the following statement is TRUE about SQL Injection?
SQL Injection is an Object Penetration Technique
SQL Injection is a Function Penetration Technique
SQL Injection is a Code Penetration Technique
SQL Injection is a Database Penetration Technique
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
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
What is the full form of GUID?
Guided Unique Identifier
Guided Unique Interpreter
Globally Unique Identifier
Globally Unique Interpreter
SQL has the advantage of?
SQL require a lot of programming.
SQL provides High-Speed Query Processing.
SQL follows the standard languages of ANSI and ISO.
SQL is easily portable.
In case of ____ data, recursive CTE is used?
Round
Hierarchal
Linear
None of the above
Which syntax is used to show all the databases?
USE DATABASES;
SELECT DATABASES;
SHOW DATABASES;
None of the above
Which of the following is NOT the SQL Arithmetic Operator?
Addition
Subtraction
Unary
Modulus
Transaction is able to control the following
Transaction
Commit
Rollback
All 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
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.
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
In order to convert the expression from one to another data type, which SQL Function is used?
CONVERT
CHANGE
CAST
TRANSIT
In order to sort the records according to the columns, which clause is used?
HAVING
GROUP BY
ORDER BY
None of the above
What is TRUE about UNION ALL Operator?
The results of both queries are combined with this operator.
After performing the UNION ALL operation, duplicate rows will not be removed.
Both A and B
None of the above
What does the CREATE TABLE Statement do?
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.
Columns in the SQL database can be created, deleted, or modified with this SQL statement.
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.
Select the statement which is TRUE?
In a table, there could be any number of rows and any number of columns.
In a table, there could be any number of rows and specified number of columns.
In a table, there could be any number of columns and specified number of rows.
In a table, there could be specified number of rows and specified number of columns.
Determine the correct SQL command?
CREATE
UPDATE
DELETE
All of the above
Select the correct statement about SQL Scripts?
At the run time, the SQL*Plus commands are ignored.
SQL Scripts and SQL Commands in the SQL Scripts have no interaction.
Through the SQL Script editor, SQL Commands are cut and pasted.
All of the above
Which command will remove the records from the table, but not affect the structure of the table?
REMOVE
DELETE
DROP
TRUNCATE
Number of operands used by Unary Operator is?
1
2
3
4
What will be the output of the below SQL statement?
25
26
24
20
Which of the following statement is TRUE about Primary Key?
Table integrity is not enforced by the primary key.
The data in a primary key is always multiple.
900 bytes is the maximum length of a primary key.
Null values are allowed in primary keys.