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.
Default Value or Binding. Displays the default for this column whenever no value is specified for this column. The value of this field can be either the value of a SQL Server default constraint or the name of a global constraint to which the column is bound.The drop-down list contains all global defaults defined in the database.To bind the column to a global default, select from the drop-down list.he value of this field can be either the value of a SQL Server default constraint or the name of a global constraint to which the column is bound. The drop-down list contains all global defaults defined in the database.