Cache and Raid performance. One of the key limitations of spinning disk hardware is the use of a physical reading armature and the time this takes to move across the surface of a diskâs platter to the required data blocks.
Constraints are part of a database schema definition. A constraint is usually associated with a table and is created with a CREATE CONSTRAINT or CREATE ASSERTION SQL statement. They define certain properties that data in a database must comply with.
A constraint is something that plays the part of a physical, social or financial restriction. It is a derived form of the intransitive verb form constrained. Constraint may refer to: 1  Theory of constraints, in business management. 2  Loading gauge or structure gauge (constraints in engineering). 3  A constraint on constrained writing, in literature.