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.
Constraint introduced into an argument or assertion to allow one variable to change while keeping other variables constant, such as, If we reduce our prices by X percent, ceteris paribus, our sales revenue should go up by Y percent.. Latin for, all other things being equal.