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试用DataCamp for Business课程描述
先决条件
Data Manipulation in SQL1
Introduction to business intelligence for a online movie rental database
The first chapter is an introduction to the use case of an online movie rental company, called MovieNow and focuses on using simple SQL queries to extract and aggregated data from its database.
2
Decision Making with simple SQL queries
More complex queries with GROUP BY, LEFT JOIN and sub-queries are used to gain insight into customer preferences.
3
Data Driven Decision Making with advanced SQL queries
The concept of nested queries and correlated nested queries is introduced and the functions EXISTS and UNION are used to categorize customers, movies, actors, and more.
4
Data Driven Decision Making with OLAP SQL queries
The OLAP extensions in SQL are introduced and applied to aggregated data on multiple levels. These extensions are the CUBE, ROLLUP and GROUPING SETS operators.
Data-Driven Decision Making in SQL
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