Understanding Oracle Data Manipulation – Intermediate-Level Quiz

Oracle Data Manipulation Quiz

Test your skills in Oracle SQL as you tackle questions on inserting, updating, deleting, and querying data. This quiz is perfect for both beginners and experienced users looking to refresh their knowledge. Get ready to enhance your understanding of data manipulation in Oracle. Good luck!

1 / 20

TCL is used to manage transactions in a database. True or False?

True

False

2 / 20

What is true about the UPDATE command?

It can update unlimited rows at a time in bulk

It can update only one row at a time

It can update only 100 rows at a time

None of the above

3 / 20

The TRUNCATE command deletes all the rows in one command. True or False?

True

False

4 / 20

Which of the following commands prevents other users from making changes to a table?

PROTECT TABLE

LOCK TABLE

SAVE POINT

ROLL BACK

5 / 20

_______ is not a transaction management SQL command.

SELECT

COMMIT

SAVEPOINT

ROLLBACK

6 / 20

In interactive data input, terminal commands are used to;

Select one or multiple inputs

Enter new data

Add and delete data

Detect and delete errors in data input

7 / 20

The ALTER command is used to alter the structure of a database. True or False?

True

False

8 / 20

The _____ SQL command is used to delete a table from a database.

Truncate

Purge

Drop

Delete

9 / 20

What will happen if the following statement is executed;

DELETE FROM employees where department_id  = &deptID;
COMMIT;

It will prompt for the department ID but transaction cannot be committed

It will raise error because DML statements cannot use substitution variables

It will prompt for the department ID to be deleted from the user and delete the record with the given department ID

None of the above

10 / 20

What is the difference between the UPSERT and MERGE statements?

UPSERT is the latest term adopted for MERGE statement, which has turned obsolete

MERGE does INSERT, UPDATE and DELETE, UPSERT does only UPDATE and INSERT

UPSERT is the latest term adopted for MERGE statement, which has turned obsolete

There is no difference

11 / 20

Which of the following objects can be the data source in a MERGE statement?

A sub-query only

A table or a sub-query

A table only

All of the above

12 / 20

Delete statements are used to delete records with and without conditions. True or False?

True

False

13 / 20

Which among the following is a common technique for inserting rows into a table?

Manually typing each value into the INSERT clause

Using SET operators

Using SELECT clause

None of the above

14 / 20

______ is used to store, retrieve, modify, delete, insert, and data in a database.

DML

DDL

TCL

DCL

15 / 20

Which of the following columns in a table are not usually updated?

LOB columns in the table

A primary key column which also serves as foreign key reference in another table

Which of the following columns in a table are not usually updated?

All of the above

16 / 20

When existing rows in a table are inserted, modified or removed from a table, it is done through a DDL statement. True or False?

True

False

17 / 20

Oracle raises exception if any of the data contained in the insert statement violates the constraint. True or False?

True

False

18 / 20

Which of the following best defines a transaction?

A transaction consists of either a collection of DML statements or a DDL or DCL or TCL statement to form a logical unit of work in a database session

A transaction consists of DDL statements on the database schema

A transaction consists of collection of DML and DDL statements in different sessions of the database

A transaction consists of COMMIT or ROLLBACK in a database session

19 / 20

What will happen if the following statement is executed;

DELETE FROM employees where department_id  = &deptID;
COMMIT;

It will prompt for the department ID but transaction cannot be committed

It will raise error because DML statements cannot use substitution variables

It will prompt for the department ID to be deleted from the user and delete the record with the given department ID

None of the above

20 / 20

Which of the following DML commands can be considered to be a hybrid of INSERT and UPDATE in a single statement?

SELECT

INTERSECT

MERGE

INSERT

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Oracle Data Manipulation involves performing operations to retrieve, insert, update, and delete data within Oracle databases. It focuses on the use of SQL Data Manipulation Language (DML) commands like SELECT, INSERT, UPDATE, and DELETE.

This topic also covers filtering, sorting, and aggregating data to effectively manage and analyze database content.

This Oracle Data Manipulation quiz is designed for database developers, DBAs, and beginners to learn and apply SQL commands for managing data.