A contrived example: Say we have two types of tools: hammers and wrenches. We have a list of work orders, and we want to track what tool was used for the ...

By using cascading referential integrity constraints, you can define the actions that SQL Server 2005 takes when a user tries to delete or update a key to which existing foreign keys point. Skip ...

In particular, I often look up constraints in SQL*Plus. In this post, I look at the Oracle database views and queries that I use most to get an idea what constraints I am dealing with.

SQL Server 2000I need to change the collation for a database from case senstitive to case insensitive. ALTER DATABASE COLLATE SQL_Latin1_General_CI_AS When I try to so, I get a whole slew of ...

SQL databases have constraints on data types and consistency. NoSQL does away with them for the sake of speed, flexibility, and scale. One of the most fundamental choices to make when developing ...