That is a great resource. Here are some I've used: Inside Microsoft SQL Server 2008 T-SQL Querying: T-SQL Querying https://books.google.com/books?id=FZlCAwAAQ

That is a great resource. Here are some I've used: Inside Microsoft SQL Server 2008 T-SQL Querying: T-SQL Querying https://books.google.com/books?id=FZlCAwAAQBAJ&printsec=frontcover#v=onepage&q&f=false https://books.google.com/books?id=FZlCAwAAQBAJ&printsec=fron... Good resource for designing high performing queries and investigating performance problems. PostgreSQL 9.0: High Performance https://books.google.com/books?id=OWOAu0GcsqoC&printsec=frontcover#v=onepage&q&f=false https://books.google.com/books?id=OWOAu0GcsqoC&printsec=fron... Greg lays out a great foundation for doing performance analysis that is largely applicable to any rdbms platform. Optimizing Oracle Performance https://books.google.com/books?id=D7ElCwAAQBAJ&printsec=frontcover#v=onepage&q&f=false https://books.google.com/books?id=D7ElCwAAQBAJ&printsec=fron... Another great book that explains the process of approaching and solving performance problems. Joe Celko's SQL For Smarties https://books.google.com/books?id=i-19BAAAQBAJ&printsec=frontcover#v=onepage&q&f=false https://books.google.com/books?id=i-19BAAAQBAJ&printsec=fron... Everyone writing SQL should read Joe.