HASAN EKEN INTEGRITY CONSTRAINTS. What is it?. Integrity constraints are used to ensure accuracy and consistency of data in a relational database. Ensuring changes do not result in loss of consistency. A DBMS should provide capabilities for defining and enforcing these constraints. . Cont`d.
The above example is to allow naming of a CHECK constraint, and for defining a CHECK constraint on multiple columns
The above example is to to allow naming of a UNIQUE constraint, and for defining a UNIQUE constraint on multiple columns