Code Smells

SQL Server Central editorial:
 * http://www.sqlservercentral.com/articles/Editorial/132082/

Simple Talk article, 119 SQL Code Smells
 * https://www.simple-talk.com/books/sql-books/119-sql-code-smells/

PDF ebook:
 * http://www.red-gate.com/products/sql-development/sql-test/entrypage/code-smells