Building visually SQL queries with Derived tables and CTE

Subqueries are one of the main powers of relational databases. A subquery is used when you want to use a query result in another query. There are 3 types of subqueries. The 1st one is derived tables, and it’s wrapped in a FROM clause in SQL.
An SQL query pulls data from database tables, and you can also represent its result as a table. We can use this derived table as an input source for another query.
Derived tables can be useful in lots of cases. You can put one query into another just to organize your thoughts about data flow, while at other times it’s mandatory to use derived tables to get the required result.
Common Table Expressions have to be at the top of the query body, before all other clauses. An SQL WITH clause allows you to name a subquery block. Later on, you can use it multiple times within this query.

[hasanmougharbel]

hello there, god bless your efforts..I have a simple enquiry as new sql learner.
How are CTEs different from temporary tables?
Thanks for taking care of this.