Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

3 Views

SQL Joins with ON Clause Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of join should you use to display all rows from the first table and only matching rows from the second table?

Right outer join

Full outer join

Left outer join (correct)

Inner join

What is the result of a Cartesian product?

An output with all rows from the first table joined with all rows from the second table (correct)

An output with only matching rows from both tables

An output with no matches

An error message

When you join two tables without specifying a condition, what type of join is created?

Self-join

Equijoin

Outer join

Cartesian product (correct)

In a CROSS JOIN, what is produced between the two tables involved?

The cross-product or Cartesian product Signup and view all the answers

What does a full (or two-sided) outer join include?

All rows from both tables, matching where possible and NULLs where not Signup and view all the answers

What is the main issue with the SQL statement provided in the text?

No rows are returned by the subquery Signup and view all the answers

Why does the outer query not return any rows even though the subquery result is null?

The outer query finds no employee with a job ID equal to null Signup and view all the answers

What is the term used for subqueries that return more than one row?

Multiple-row subqueries Signup and view all the answers

How should multiple-row subqueries be handled in SQL?

Use multiple-row operators with multiple-row subqueries Signup and view all the answers

What happens in SQL when comparing two null values?

It yields a null value Signup and view all the answers