La gente de codeschool publicaron varios cursos sobre base de datos, para la gente que quiere perfeccionar su conocimiento en sql.
Les dejo el programa:
COURSE OVERVIEW
LEVEL 1 FREE LEVELAggregate Functions 2 Videos | 10 Challenges
Learn how to use SQL aggregate functions, including COUNT, SUM, and AVG, to do calculations on groups of data.
LEVEL 2Table Constraints 2 Videos | 11 Challenges
Add constraints — like NOT NULL, UNIQUE, FOREIGN KEY, and PRIMARY KEY — to your tables to increase data integrity.
LEVEL 3Normalization and Relationships 2 Videos | 7 Challenges
Apply normalization rules to create tables without duplicate data and build the appropriate relationships.
LEVEL 4Inner Joins, Aliases, and Outer Joins 3 Videos | 7 Challenges
Explore writing a single query to pull data from multiple tables and using aliases to create succinct queries.
LEVEL 5Subqueries 1 Video | 3 Challenges
Dive deeper as you learn how to write queries within queries.
Dejo link:
https://www.codeschool.com/courses/the-sequel-to-sql/
