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25 Cards in this Set
- Front
- Back
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The impact of database technology on business can easily overstated
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False
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Multiple characters make up a record
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False
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A database itself is a collection of several related files, but DBMs do all the work- structuring files storing data and linking records
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True
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Data is accessed in a database by sending messages call "protocols" which request data from specific records and / or fields and direct the computer to display the results
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False
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Sometimes a key is composed of several recores so that their combination provides a unique key.
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False
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One of the most useful manipultions of object-oriented databases (ODB) is the creation of a new table from two or more other tables
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False
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A schema describes the structure of the database being designed: the names and types of fields in each record type and the general relationship among different set of records or files
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True
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The conceptual blueprint of the database is called an entity relationship diagram (ERD)
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True
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The very fact that manipulation of the data requires a programmer is probably the greatest disadvantage of the ___
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file approach
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Often the traditional file approach to storing data leads to low
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data integrity
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In the database approach, data pieces are organized about ____
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entities
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Acollection of related records, such as all the records of a college's students is called a ____
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file
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A _____ is the general logical structure in which records are stored within a database and the method used to establish relationship among the record
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data model
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To design a ______ you need a clear ida of the different entities and how they relate
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relational database
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to link records from one table with records of another talbe, the tables must have at least one field in common and field must a _____ field for one of the tables
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primary key
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A _____ can be maintained, for instance for professors and students in a college database
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Many to Many relationship
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The combied storage of both data and the procedures that manipulate them is referred to as _______
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encapsulation
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A____ is created "on the fly" as a result of a query and exists only for the duration the user wishes to view it or to create a paper report from it.
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join table
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Many____ also allow a builder to positively indicate when a field is not unique, meaning that the value in that fieldmight by the same for more than one record
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DBMSs
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____do not replace transactinal database, which are updated, which are updated with daily transactions such as sales, billing, cash receipt and returns
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Data warehouse
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If ____ need to be used as one large data warehouse, special soft ware tools can unify them and make them appear as on e large data warehouses
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data marts
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Because of capacity needs, organization often choose ____ to store and manage data warehouse
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mainframe computers with multiple CPD
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To uncover the valuable information contained in their data, organization must use software that can effectively ____ data warehourse
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mine
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The designers of data warehouse keep in mind_____ the ability of the data
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scalability
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In the _____ phase of transferring data from a transactional database to a data warehouse, specialisits "cleanse" the data and modify it into a form that allows inseration into the data warehouse
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transformation
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