It often seems that working around things is a full-time task in every area of information technology. When workarounds are conceived and deployed, people are not always in agreement. Beyond ...

Referential integrity helps manage data by enforcing validation between related entities. This enforcement follows logical semantics behind the database design -- i.e., an employee can only work for ...

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 ...

Abstract: Key and referential constraints are the two main integrity constraints in database applications. These constraints can be enforced by the Database Management System automatically. Any ...

Categories of data model: 1)Relational Model: -collection of tables -tables show the relationship and data -Record-based model -most widely used model 2)Entity relationship model: -Collection of ...