Gain insights into SQL by exploring database creation, data manipulation, and advanced queries. Learn about practical applications and practice for SQL interviews to build confidence and readiness.

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The ability to work SQL is becoming an increasingly in-demand skill, both for software developers and people in less technical roles. If you’re interested in learning SQL and have no prior experience with it, then this course will be your light in a dark tunnel.

You’ll start by covering the basics of SQL such as how to create a database, how to insert, query, and update data. You’ll also learn fundamental concepts that developers and data scientists use everyday such as multi-table operations, nested queries, and how to set up views. 

Throughout, you’ll get to execute SQL queries in your browser and see results in real-time - you won’t need to worry about set-up.

At the end of this course, you’ll also get some hands-on practice with common SQL interview questions, so when the time comes, you’ll be ready and confident to answer any question that comes your way. Let’s get started!

An Introductory Guide to SQL

Recall that a full join includes all the rows from the two tables. Furthermore, we are assured that neither of the tables has a duplicate row. We'll relax this condition in the next question and see how it affects the outcome. For this question, we can __UNION__ the result of the left join of the movie table with the right join of the cinema table to get a full join between the two tables. Note that the __UNION__ operator will include the intersecting part/rows between the two tables only once.

```mysql
SELECT MovieID, MovieName FROM Movie
LEFT JOIN Cinema
WHERE MovieID = MovieID;

UNION

SELECT MovieID, CinemaName FROM Movie
RIGHT JOIN Cinema
WHERE MovieID = MovieID;
```


Recall that a full join includes all the rows from the two tables. Furthermore, we are assured that neither of the tables has a duplicate row. We’ll relax this condition in the next question and see how it affects the outcome. For this question, we can UNION the result of the left join of the movie table with the right join of the cinema table to get a full join between the two tables. Note that the UNION operator will include the intersecting part/rows between the two tables only once.
<pre><code class="language-mysql">SELECT MovieID, MovieName FROM Movie
LEFT JOIN Cinema
WHERE MovieID = MovieID;

UNION

SELECT MovieID, CinemaName FROM Movie
RIGHT JOIN Cinema
WHERE MovieID = MovieID;
</code></pre>

![](/udata/zOqQ720Ev4l/fullJoin.png)

Consider the two tables shown above, that are related by the column __MovieID__ which is unique. Additionally, assume there are no duplicate rows in either of the tables.

Can you write a query that emulates a full join between the two tables?




<img src="/udata/zOqQ720Ev4l/fullJoin.png" alt="" />
Consider the two tables shown above, that are related by the column MovieID which is unique. Additionally, assume there are no duplicate rows in either of the tables.
Can you write a query that emulates a full join between the two tables?

Question # 1

Question # 1

Quiz yourself on MySQL commands, including JOINs and constraints.

Introduction

Basic SQL

Joins

Nested Queries

Multi Table Operations

Views

Stored Procedures

Triggers

Miscellaneous

Practice & Prep

Epilogue

Quiz 7