Itzik Ben-Gan is a T-SQL trainer and a co-founder of Lucient. A Data Platform Microsoft MVP (Most Valuable Professional) since 1999, Itzik has delivered numerous training events around the world focused on T-SQL Querying, Query Tuning and Programming. Itzik authored many articles and books including T-SQL Fundamentals and T-SQL Querying. Itzik’s speaking activities include SQLPASS, SQLBits, and other Microsoft Data Platform events. Itzik is the author of Lucient’s Advanced T-SQL Querying, Programming and Tuning and T-SQL Fundamentals courses along with being a primary resource within the company for their T-SQL related activities.
Continuing his treatment of NULLs in SQL Server, Itzik Ben-Gan covers how SQL Server's implementation of unique constraints differs from the standard, and how you can work around it.
