Access ch 2 Flashcards
Data Redundancy
Unnecessary storage of data in two or more tables
Data Type
Determines the type of data that can be entered and the operations that can be performed on that data
Foreign Key
The same key as the Primary key in an adjoining table
field properties
determines how the field looks and behaves
caption property
create a label that is more understandable than a field name
Referential Integrity
enforces rules in a database that are used to preserve relationships b/w tables when records are changed
Cascade Update Related Fields
when a primary key is updated, all foreign keys are as well
Cascade Delete Record Fields
When a primary key record is deleted, all foreign key records are deleted as well
one-to-many relationship
primary key can match many of the foreign key values in another table
Simple Query Wizard
guides you through query design with step by step process. creates basic queries that do not require criteria.
Wildcards
*,?,[],[!]
Comparison operators
=<>
null
a blank field
AND condition
query results will only show records that match ALL criteria
OR condition
displays records that match ANY of the citeria