Feature: In Create table Chapter want to add How to create table from existing table

[maneprajakta]

Is your feature request related to a problem? Please describe.

Create table Chapter don't include point of How to create a new table from existing table

Describe the solution you'd like

I would like to add the point with an example.
Syntax of it
CREATE TABLE new_table AS (SELECT * FROM old_table);

Additional context

Want to contribute as part of Hacktoberfest 2021

[maneprajakta]

@bobbyiliev can you assign me this if it is vallid.

[bobbyiliev]

I like the suggestion! Looking forward to your PR @maneprajakta