June 2004
Intermediate to advanced
848 pages
21h 28m
English
Content preview from Just Java™ 2
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Relational Database Glossary
Table 23-5 is a glossary of terms that you can review and refer to as necessary. There are a few terms in here that appear later in the chapter.
Table 23-5. Relational database glossary
|
Name |
Description |
|---|---|
|
attribute |
A column in a table, e.g., the “Name” attribute. |
|
cardinality |
The number of rows in a relation. |
|
database integrity |
You maintain database integrity by grouping statements in a “transaction” that is either executed as a whole, or has no part of it executed. |
|
degree |
The number of columns in a table. |
|
domain |
The set of permissible values for an attribute. |
|
entity integrity |
The requirement that key attributes never contain a null. |
|
first normal form |
A table in which no attributes ... |
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