Question

In SQL sequence-

• A. Automatically generates unique numbers
• B. Is a sharable object
• C. Is typically used to create a primary key value
• D. AlI of the above

Answer 1

The correct option is D AlI of the above

In SQL sequence:-

A sequence is a user-defined schema bound object that generates a sequence of numeric values according to the specification with which the sequence was created. The sequence of numeric values is generated in an ascending or descending order at a defined interval and can be configured to restart (cycle) when exhausted.

Automatically generates unique numbers:-

Sequence is a set of integers 1, 2, 3, that are generated and supported by some database systems to produce unique values on demand.

A sequence is a user defined schema bound object that generates a sequence of numeric values.

SQL sequence has a sharable object:-

Sequence object can be referenced by applications directly and can also be shared by many rows or many tables.

SQL sequence is typically used to create a primary key value:-

Sequences are frequently used in many databases because many applications require each row in a table to contain a unique value and sequences provides an easy way to generate them.