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Home » MCQs » Oracle MCQs

Oracle Tables MCQs

Oracle Tables MCQs: This section contains multiple-choice questions and answers on Tables in Oracle.
Submitted by Anushree Goswami, on June 05, 2022

1. A new table is created in an Oracle database using the ____ TABLE statement.

  1. CREATE
  2. UPDATE
  3. ALTER
  4. NEW

Answer: A) CREATE

Explanation:

A new table is created in an Oracle database using the CREATE TABLE statement.

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2. Tables are created by _____ types for each column.

  1. Naming them
  2. Defining their Columns
  3. Specifying the Data
  4. All of the above

Answer: D) All of the above

Explanation:

Tables are created by naming them, defining their columns, and specifying the data types for each column.

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3. What is the syntax to create a table?

  1. CREATE TABLE
  2. CREATE COLUMN
  3. CREATE ROW
  4. CREATE DATABASE

Answer: A) CREATE TABLE

Explanation:

Syntax to create a table is CREATE TABLE.

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4. What does the table_name in syntax specifies?

  1. Specifies the table name that you would like to create.
  2. Specifies the table number that you would like to create.
  3. Specifies the table row that you would like to create.
  4. Specifies the table column that you would like to create.

Answer: A) Specifies the table name that you would like to create

Explanation:

The table_name in syntax specifies the table name that you would like to create.

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5. What the column must have while creation?

  1. Dataset
  2. Datatype
  3. Datalink
  4. Database

Answer: B) Datatype

Explanation:

Columns must have Datatypes while creation.

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6. While creating table, the column should be specified as ____.

  1. NULL
  2. NOT NULL
  3. Both A and B
  4. None of the above

Answer: C) Both A and B

Explanation:

While creating a table, the column should be specified as either NULL or NOT NULL.

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7. What is the value of the column by default, if the value is left blank?

  1. NULL
  2. NOT NULL
  3. 0
  4. 1

Answer: A) NULL

Explanation:

The value of the column is NULL by default if the value is left blank.

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8. ____ keys are single fields or combinations of fields that contain unique information about the record.

  1. Primary
  2. Alternate
  3. Foreign
  4. Composite

Answer: A) Primary

Explanation:

Primary keys are single fields or combinations of fields that contain unique information about the record.

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9. Primary keys cannot contain ____ values in any field.

  1. Null
  2. 0
  3. 1
  4. Not Null

Answer: A) Null

Explanation:

Primary keys cannot contain null values in any field.

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10. Primary keys can only be found in ____ table at a time.

  1. One
  2. Two
  3. Three
  4. Multiple

Answer: A) One

Explanation:

Primary keys can only be found on one table at a time.

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11. By copying the columns of an existing table, the CREATE TABLE __ statement creates a new table based on an existing table.

  1. AS
  2. IN
  3. ON
  4. FOR

Answer: A) AS

Explanation:

By copying the columns of an existing table, the CREATE TABLE AS statement creates a new table based on an existing table.

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12. A new table will contain records from the ___ table if it is created using the CREATE TABLE AS method.

  1. Existing
  2. New
  3. Redundant
  4. None

Answer: A) Existing

Explanation:

A new table will contain records from the existing table if it is created using the CREATE TABLE AS method.

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13. What is the syntax of CREATE TABLE AS?

  1. CREATE TABLE table_name AS (SELECT*FROM previoustable_name)
  2. CREATE TABLE table_name IN (SELECT*FROM previoustable_name)
  3. CREATE TABLE table_name FROM (SELECT*FROM previoustable_name)
  4. CREATE TABLE table_name AT (SELECT*FROM previoustable_name)

Answer: A) CREATE TABLE table_name AS (SELECT*FROM previoustable_name)

Explanation:

Syntax of CREATE TABLE AS is CREATE TABLE table_name AS (SELECT*FROM previoustable_name).

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14. The ALTER TABLE statement specifies whether a column should be ____ or deleted in a table in Oracle.

  1. Added
  2. Modified
  3. Dropped
  4. All of the above

Answer: D) All of the above

Explanation:

The ALTER TABLE statement specifies whether a column should be added, modified, dropped, or deleted in a table in Oracle.

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15. ALTER TABLE is also used to ____ the table.

  1. Revert
  2. Rename
  3. Resize
  4. Reuse

Answer: B) Rename

Explanation:

ALTER TABLE is also used to rename the table.

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16. What is the syntax to add column in the table?

  1. ALTER TABLE table_name ADD column_name column-definition;
  2. ALTER TABLE table_name ALTER column_name column-definition;
  3. ALTER TABLE table_name UPDATE column_name column-definition;
  4. ALTER TABLE table_name NEW column_name column-definition;

Answer: A) ALTER TABLE table_name ADD column_name column-definition;

Explanation:

Syntax to add column in the table is,

ALTER TABLE table_name ADD column_name column-definition;

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17. What is the statement to modify the column in the table?

  1. MODIFY
  2. MODULE
  3. UPDATE
  4. ALTER

Answer: A) MODIFY

Explanation:

The statement to modify the column in the table is MODIFY.

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18. What is the statement to drop a column in the table?

  1. DROP ROW
  2. DELETE ROW
  3. DROP COLUMN
  4. DELETE COLUMN

Answer: C) DROP COLUMN

Explanation:

The statement to drop a column in the table is DROP COLUMN.

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19. What is the statement to rename a column in the table?

  1. RENAME COLUMN
  2. RENAME ROW
  3. RECHANGE COLUMN
  4. UPDATE COLUMN NAME

Answer: A) RENAME COLUMN

Explanation:

The statement to rename a column in the table is RENAME COLUMN.

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20. You can drop a table from the Oracle database by using the ____ statement.

  1. DROP COLUMN
  2. DROP ROW
  3. DROP DATABASE
  4. DROP TABLE

Answer: D) DROP TABLE

Explanation:

You can drop a table from the Oracle database by using the DROP TABLE statement.

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21. What is/are the parameter(s) in DROP TABLE?

  1. Schema_name and table_name
  2. CASCADE CONSTRAINTS
  3. PURGE
  4. All of the above

Answer: D) All of the above

Explanation:

The parameters in DROP TABLE are,

  1. Schema_name and table_name
  2. CASCADE CONSTRAINTS
  3. PURGE

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22. The schema owned by a table is specified by what?

  1. Schema_name
  2. Table_name
  3. CASCADE CONSTRAINS
  4. PURGE

Answer: A) Schema_name

Explanation:

The schema owned by a table is specified by schema_name.

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23. In addition to eliminating all ____ integrity constraints, CASCADE CONSTRAINTS will also drop all other constraints.

  1. Consecutive
  2. Sequential
  3. Referential
  4. Relational

Answer: C) Referential

Explanation:

In addition to eliminating all referential integrity constraints, CASCADE CONSTRAINTS will also drop all other constraints.

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24. With ____, the table and all its dependent objects are removed from the database and are not recoverable.

  1. CASCADE
  2. CASCADE CONSTRAINS
  3. PURGE
  4. None

Answer: C) PURGE

Explanation:

With PURGE, the table and all its dependent objects are removed from the database and are not recoverable.

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25. Oracle will ____ the table if there is a referential integrity constraint on table_name that is not specified as CASCADE CONSTRAINTS on the DROP TABLE statement.

  1. Not Drop
  2. Drop
  3. Not Delete
  4. Delete

Answer: A) Not Drop

Explanation:

Oracle will not drop the table if there is a referential integrity constraint on table_name that is not specified as CASCADE CONSTRAINTS on the DROP TABLE statement.

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26. The main difference between temporary tables and ordinary tables is that temporary tables cannot have ____ keys related to other tables.

  1. Primary
  2. Foreign
  3. Composite
  4. Alternate

Answer: B) Foreign

Explanation:

The main difference between temporary tables and ordinary tables is that temporary tables cannot have foreign keys related to other tables.

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27. The _____ and block types are all available to temporary tables.

  1. Triggers
  2. Join Cardinality
  3. Information about rows
  4. All of the above

Answer: D) All of the above

Explanation:

The triggers, join cardinality, information about rows, and block types are all available to temporary tables.

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28. With Oracle database, data is managed in an ____ manner (1).

  1. Open
  2. Integrated
  3. Complete
  4. All of the above

Answer: D) All of the above

Explanation:

With the Oracle database, data is managed in an open, integrated, and complete manner.

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29. What is the syntax of creating global temporary tables?

  1. CREATE GLOBAL TEMPORARY TABLE
  2. CREATE LOCAL TEMPORARY TABLE
  3. CREATE TEMPORARY TABLE
  4. None

Answer: A) CREATE GLOBAL TEMPORARY TABLE

Explanation:

The syntax for creating global temporary tables is CREATE GLOBAL TEMPORARY TABLE.

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30. ____ temporary tables in Oracle are distinct from temporary tables within modules.

  1. Global
  2. Null
  3. Local
  4. Not Null

Answer: C) Local

Explanation:

Local temporary tables in Oracle are distinct from temporary tables within modules.

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31. Oracle's temporary tables are local to the ____ in which they are created and cannot be accessed outside of that ____.

  1. Session
  2. Time
  3. Date
  4. None

Answer: A) Session

Explanation:

Oracle's temporary tables are local to the session in which they are created and cannot be accessed outside of that session.

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32. What is the syntax to declare the local temporary tables?

  1. DECLARE TABLES
  2. DECLARE TEMPORARY TABLE
  3. DECLARE LOCAL TEMPORARY TABLE
  4. DECLARE GLOBAL TEMPORARY TABLE

Answer: C) DECLARE LOCAL TEMPORARY TABLE

Explanation:

The syntax to declare the local temporary tables is DECLARE LOCAL TEMPORARY TABLE.

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