Relational databases suggested answers to discussion questions
What is a data dictionary, what does it contain, and how is it used?
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rais12 SM CH04 (1)
4.6
What is a data
dictionary
, what does it contain, and how is it used?
A
data dictionary
contains information about the structure of the database. Table 4-1 shows that there is a record in the dictionary describing each data element.
The DBMS
maintains the data dictionary
, whose inputs include new or deleted data elements and
changes in data element names
,
descriptions
, or uses. Outputs include
reports for programmers
,
designers
, and users. These reports are
used for system documentation
, database
design and implementation
, and as part of the audit trail.
>
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