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Oracle SQL Data Types

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Questions and Answers

What is the primary purpose of the NUMBER data type in Oracle database?

To store numeric values.

What is the main difference between the BLOB and CLOB data types?

BLOB is used for binary data, while CLOB is used for character data.

Which data type is used to store very large amounts of unstructured data in Oracle database?

BFILE.

What is the purpose of the DATE data type in Oracle database?

To store dates and times. Signup and view all the answers

What is the main purpose of the VARCHAR2 data type in Oracle database?

To store variable-length character strings. Signup and view all the answers

What are the three character data types in Oracle database that support Unicode characters?

NCHAR, NVARCHAR2 Signup and view all the answers

Which two data types are used to store large amounts of binary data in Oracle database?

BLOB, BFILE Signup and view all the answers

What is the main difference between the CHAR and VARCHAR2 data types in Oracle database?

CHAR is a fixed-length character data type, while VARCHAR2 is a variable-length character data type Signup and view all the answers

Which data type is used to store date and time values in Oracle database?

DATE, TIMESTAMP Signup and view all the answers

What is the purpose of the LONG and RAW data types in Oracle database?

LONG is used to store large amounts of character data, while RAW is used to store binary data Signup and view all the answers

Study Notes

Classification of Built-in Data SQLTypes in Oracle Database

Oracle database has five categories of built-in data types

Character Data Types

Include: CHAR, VARCHAR2, NCHAR, NVARCHAR2
Used to store character data

Number Data Types

Include: NUMBER, FLOAT
Used to store numerical data

Datetime and Interval Data Types

Include: DATE, TIMESTAMP
Used to store date and time data

Large Object (LOB) Data Types

Include: BLOB, CLOB, NCLOB, BFILE
Used to store large objects such as images, videos, and audio files

LONG and RAW Data Types

Include: LONG, RAW
Used to store long strings of raw, unformatted data

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Description

Test your knowledge of Oracle's built-in data types, including character, number, datetime, and large object data types. Learn to identify and distinguish between CHAR, VARCHAR2, NUMBER, FLOAT, DATE, TIMESTAMP, BLOB, CLOB, NCLOB, BFILE, LONG, and RAW data types.