sql.tar.gz

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

# Creating a View
Views are virtual tables that are created as a result of a SELECT query. They offer a number of advantages such as showing only a subset of data that is meaningful to users or restricting the number of rows and columns shown for security reasons. A view containing columns from multiple tables can simplify queries by changing a multi-table query to a single-table query against a view. Views are stored in the database along with tables.

A view can be created from a single table, by joining two tables, or from another view.


In this lesson we will learn about three different ways of creating views.

Introduction

Basic SQL

Joins

Nested Queries

Multi Table Operations

Views

Stored Procedures

Triggers

Miscellaneous

Practice & Prep

Epilogue

Creating a View

Creating a View