A UNIQUE experience

A properly designed table must have a key to uniquely identify each row. In this article, Joe Celko explains unique...

Joe Celko in Theory and design

Constraints and declarative referential integrity

Database systems have powerful features built right in that can ensure the integrity of data. In this article, Joe Celko...

Sergey Gigoyan in Career

SQL Server tech interview questions must be well crafted to make sure the candidate actually knows the topic. In this...