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a database that contains multiple tables related through common fields
a field, contained in two or more tables, that forms a relationship between the tables
a connection between two or more tables based on a common field
search engine displays a list of categories and subcategories that you can browse to find
you enter keywords in a search engine to query an index
each record in Table A can have only one matching record in Table B
a record in Table A can have many matching records in Table B, but a record in
one record in either Table A or B can relate to many matching records in the other
a field containing a value that uniquely identifies each record in a table
a field in a related table that refers to the primary key in another table
Structured Query Language (SQL)
the standard interactive and programming language for accessing information from
only finds Web sites based on manual submissions
generally bases information on secondary resources.
bases its research on primary resources.
Encyclopedias and reference material that list additional titles.