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 ...

Alter Table [MyTable] Drop [myConstraint] Right?Anyways, I know I figured out how to do it before, and that it was pretty simple. What I don't know how to ...

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 ...

Considering a switch from SQL to a document model? Learn the real-world pros, tradeoffs, and what to expect from modern NoSQL ...

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 ...

Real-world relational databases have tables that contain fields, constraints, and triggers, and tables are related through foreign keys. SQL is used to declare the data to be returned, ...

It is rare to find an implemented database devoid of reference tables. Reference tables provide valid values for drop-down lists and in a slightly obtuse way, also allow for expression of a domain or ...