Sql

Whether you're managing large datasets or writing your first query, build your SQL skills with this practical guide. Learn the basic elements of relational databases and walk through the syntax, features, and applications of SQL. Then dive into the sublanguages of SQL and apply them for tasks such as modifying tables and querying data. See SQL in action with an example PostgreSQL database and detailed code samples from real-word applications. Highlights: 1) Schemas 2) Tables 3) Views 4) Keys 5) PostgreSQL 6) Data definition language (DDL) 7) Data manipulation language (DML) 8) Transaction control language (TCL) 9) Data query language (DQL) 10) Data control language (DCL) 11) Entity-relationship diagrams (ERD).