Designing the data storage architecture is an important activity in system design. There are two main types of data storage formats: files and databases. Files are electronic of data that have been optimized to perform a particular transaction. There are several types of files that differ in the way they are used to support an application.( ) store core information that is important to the business and , more specifically , to the application , such as order information or customer mailing information . ( ) contain static values , such as a list of valid codes or the names of cities . Typically, the list is used for validation. A database is a collection of groupings of information that are related to each other in some way. There are many different types of databases that exist on the market today.( ) is given to those databases which are based on older , sometimes outdated technology that is seldom used to develop new applications . ( ) are collections of records that are related to each other through pointers In relational database , ( ) can be used in ensuring that values linking the tables together through the primary and foreign keys are valid and correctly synchronized.
A.Master files B.Look-up files C.Transaction files D.History files
问题2:
A.Master files B.Look-up files C.Audit files D.History files
问题3:
A.Legacy database B.Backup database C.Multidimensional database D.Workgroup database
问题4:
A.Hierarchical database B.Workgroup database C.Linked table database D.Network database
问题5:
A.identifying relationships B.normalization C.referential integrity D.store procedure
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