Teach Yourself SQL in 21 Days (Sams Teach Yourself)

Discover effective database design structures; learn to use functions and clauses to query data; discover faster, easier methods for manipulating data; create tables and advanced queries with ease; learn to identify and solve common SQL errors; tune your database using stored procedures and triggers; gain valuable insight, tips, techniques, and advice from industry experts; gain an understanding of PL/SQL, Transact SQL, and SQL Plus.