kinkir / MySQL

Lab Notebooks for Coursera course Manage Big Data with MySQL

Managing Big Data with MySQL

Note
More Notebooks will be uploaed in the comming week

This repository stores the exercise notebooks of the Coursera course Managing Big Data with MySQL.

Exercise Jupyter Notebooks can be viewed using nbviewer

• Exercise 1: Looking at Your Data
• Exercise 2: Selecting Data Subsets using WHERE
• Exercise 3: Formatting Selected Data
• Exercise 4: Summarizing Your Data
• Exercise 5: Summaries of Groups of Data
• Exercise 6: Common Pitfalls of Gourped Data

Querying Single Table

The course teaches the basics of MySQL queries in business analytics. The key concepts of querying a single table is summarized by the following diagrams

The Acutal Excution Order of a SQL Query

Note that the actual excuation order of SQL queries is different with the order we write them. The following diagram shows the the difference.

Query Multiple Tables

Cartesian Product

Joins: inner, lefter outer, right outer, and full outer