Definitely recommend this book (Defensive Database Programming) to anyone. I think that book is for begginers and for professionals :-). Also I recommend a set of seven "The Best Off SQLservercentral.com" books.

For All begginers also I recommend monitoring sqlservercentral.com forum and articles, is more informative than books.

For my 25 years of SQL practice I must say that sqlservercentral.com is the best source of SQL knowledge of sql servers and programming sql.