Joe Celko's Analytics and OLAP in SQL (The Morgan Kaufmann Series in Data Management Systems)

Joe Celko's SQL for smarties

Joe Celko's data, measurements, and standards in SQL

SQL puzzles & answers

Joe Celko's Complete Guide to NoSQL

Joe Celko's thinking in sets

Joe Celko's SQL Puzzles and Answers, Second Edition (The Morgan Kaufmann Series in Data Management Systems)

Joe Celko's SQL Programming Style (The Morgan Kaufmann Series in Data Management Systems)

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)

Joe Celko's Data and Databases

Joe Celko's SQL for Smarties