Recap

1. Recap

Well done! You've reached the final video of this course. Let's briefly review what you've learned.

2. Chapter 1 - Use Real-World SQL

In chapter one you practiced your SQL commands and functions by answering questions pertinent to your DVD rental business.

3. Chapter 2 - Find Your Data

Chapter two introduced you to techniques you can use to explore your database to find the tables you need.

4. Chapter 3 - Manage Your Data

Chapter three covered the ways in which you can manage the data in your database, ranging from creating to modifying to deleting your data.

5. Chapter 4 - Best Practices for Writing SQL

Finally, chapter four covered the importance and methods for applying best practices when writing SQL scripts.

6. Congratulations!

Thank you for the time that you have dedicated to this course. I find these methods and tools to be indispensable for my work as a data scientist and I hope that you will gain the same value for your work. It has been a pleasure to work with you and I wish you the best of luck on your journey of learning.

Create Your Free Account

or

By continuing, you accept our Terms of Use, our Privacy Policy and that your data is stored in the USA.

This exercise is part of the course

Applying SQL to Real-World Problems

IntermediateSkill Level

4.9+

Start Course for Free

You will review some of the most commonly used SQL commands to ensure you are prepared to tackle both real-world problems as well as every exercise covered in this course.

Exercise 1: Essential SQL Exercise 2: Review the essentials Exercise 3: Practice the essentials Exercise 4: Transforming your results Exercise 5: Transform numeric & strings Exercise 6: Extract what you need Exercise 7: Working with aggregate functions Exercise 8: Aggregating finances Exercise 9: Aggregating strings Exercise 10: Which tables?

How do you find the data you need in your database in order to answer real-world business questions? Here you will learn how to use system tables to explore your database. You will use these tables to create a new tool that contains a list of all tables and columns in your database. Finally, you will create an Entity Relationship Diagram (ERD) which will help you connect multiple tables.

Exercise 1: Find the right table Exercise 2: LIMITing your search Exercise 3: Which table to use?Exercise 4: What tables are in your database?Exercise 5: Determine the monthly income Exercise 6: Join the correct tables Exercise 7: What columns are in your database?Exercise 8: A VIEW of all your columns Exercise 9: Testing out your new VIEW Exercise 10: The average length of films by category Exercise 11: Complex joins Exercise 12: Build the entity relationship diagram Exercise 13: Which films are most frequently rented?

Working with SQL to solve real-world problems will oftentimes require you to do more than retrieve the data you need, oftentimes you will need to manage the data in your database. This includes creating data, updating it and, when necessary, deleting it.

Exercise 1: Store your data Exercise 2: Storing new data Exercise 3: Using existing data Exercise 4: TABLE vs VIEW Exercise 5: Update your data Exercise 6: What should you modify?Exercise 7: Update the price of rentals Exercise 8: Updated based on other tables Exercise 9: Delete your data Exercise 10: Deleting all table data Exercise 11: Delete selected records Exercise 12: A family friendly video store

How do you ensure that the SQL scripts you write will be easy to understand for anyone who needs to read them? This chapter will cover approaches you can leverage to ensure that your code clearly conveys your intent, is readable by others and follows best practices.

Exercise 1: Convey your intent Exercise 2: How to convey our intent Exercise 3: Clarify the intent of this query Exercise 4: Fix this query - intent Exercise 5: Write readable code Exercise 6: How to make code easier to read Exercise 7: Make this query easier to read - Part I Exercise 8: Make this query easier to read - Part II Exercise 9: Avoid common mistakes Exercise 10: What are the don'ts of writing SQL code?Exercise 11: Apply best practices to your code Exercise 12: Recap

Current Exercise