Download Introduction to SQL by Phil Spector, This note covers the following topics: Multiple simultaneous changes to data, Uses of Databases, Ways to Use SQL, Some Relational Database Concepts ,Variable Types, CREATE TABLE statement, Entering observations into a table, Comparison Operators, Updating a Table , The SELECT statement, Selecting based on Summaries, Subqueries, Making Tables from Queries, SELECT with multiple tables. Download pdf from below to explore all content and start learning.