[Solved] What is a derived table in PostgreSQL when using a subquery in the FROM clause? — Ans: A temporary table created by a subquery inside the FROM clause | PostgreSQL

PostgreSQL - Subqueries in PostgreSQL

What is a derived table in PostgreSQL when using a subquery in the FROM clause?

AA table created using the <code>CREATE TABLE</code> statement

BA temporary table created by a subquery inside the <code>FROM</code> clause

CA permanent table stored in the database

DA table that cannot be used in joins

Step-by-Step Solution

Solution:

Step 1: Understand the role of subqueries in FROM
A subquery in the FROM clause acts like a temporary table for that query.
Step 2: Identify what a derived table means
This temporary table is called a derived table because it is derived from the subquery's result.
Final Answer:
A temporary table created by a subquery inside the FROM clause -> Option B
Quick Check:
Derived table = Temporary table from subquery [OK]

Quick Trick: Subquery in FROM creates a temporary table called derived table [OK]

Common Mistakes:

Master "Subqueries in PostgreSQL" in PostgreSQL

9 interactive learning modes - each teaches the same concept differently

What is a derived table in PostgreSQL when using a subquery in the FROM clause?