Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is updated or ...

There are two categories of integrity constraints: General constraints, which allow you to restrict the data values that are accepted for the variables in a single data file, such as requiring that ...

There are so many problems with foreign key constraints that we don't know where to start: Foreign key constraints make life very complicated, because the foreign key definitions must be stored in a ...

I'm working on a web app, and it part of it, there is a very simple database-driven file/document manager. As a file manager, there is the possibility of sub-folders. So in the DB, I have the ...

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 hammering and what was used for the wrenching. The problem is that ...