I have a foundation in SQL, but I'm looking to take my proficiency to the next level. What resources would you suggest for better understanding SQL and becoming more efficient/effective?<p>Books, blogs, etc. Anything would be great!
And these are some links I've been looking at/considering:<p><a href="http://www.amazon.com/Advanced-Oracle-SQL-Programming-Focus/dp/0977671585/" rel="nofollow">http://www.amazon.com/Advanced-Oracle-SQL-Programming-Focus/...</a><p><a href="http://www.amazon.com/Pro-Oracle-SQL-Karen-Morton/dp/1430232285/ref=sr_1_1?ie=UTF8&s=books&qid=1282203148&sr=8-1" rel="nofollow">http://www.amazon.com/Pro-Oracle-SQL-Karen-Morton/dp/1430232...</a><p><a href="http://www.amazon.com/SQL-Antipatterns-Programming-Pragmatic-Programmers/dp/1934356557/ref=pd_bxgy_b_text_z" rel="nofollow">http://www.amazon.com/SQL-Antipatterns-Programming-Pragmatic...</a><p><a href="http://www.amazon.com/Joe-Celkos-Smarties-Fourth-Edition/dp/0123820227" rel="nofollow">http://www.amazon.com/Joe-Celkos-Smarties-Fourth-Edition/dp/...</a><p><a href="http://www.amazon.com/SQL-Tuning-Dan-Tow/dp/0596005733" rel="nofollow">http://www.amazon.com/SQL-Tuning-Dan-Tow/dp/0596005733</a>