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.
Any good SQL Server database will use constraints and other DRI in order to maintain integrity and increase performance. The violation of any constraints leads to an error, and it is rare to see this handled well. Autocommit transaction mode. Letâs create a table that allows us to be able to make a couple of different constraint violations. Youâll have to imagine that this is a part of a contact database that is full of constraints and triggers that will defend against bad data ever reaching the database. Naturally, there will be more in this table.