Joe Celko's Analytics and OLAP in SQL
Joe Celko's Data and Databases: Concepts in Practice
Joe Celko's Data, Measurements and Standards in SQL
Joe Celko's SQL for Smarties
Joe Celko's SQL for Smarties: Advanced SQL Programming Third Edition (The Morgan Kaufmann Series in Data Management Systems)
Joe Celko's SQL Programming Style
Joe Celko's SQL Puzzles and Answers, Second Edition
Joe Celko's Thinking in Sets: Auxiliary, Temporal, and Virtual Tablesin SQL
Joe Celko's Trees and Hierarchies in SQL for Smarties, (The Morgan Kaufmann Series in Data Management Systems) (The Morgan Kaufmann Series in Data Management Systems)