Jason A. Long (5/30/2015)
My default answer for that question, for the last few years, has been to start by picking up a copy on "Microsoft SQL Server 2012 T-SQL Fundamentals" by Itzik Ben-Gan.
+ 1000 I learned a lot of syntax from videos, but the eureka moments and deeper fundamentals came from this book. Highly recommend it. Also keep reading the posts on here they helped a lot!
***SQL born on date Spring 2013:-)