Definitions for "Primary Key"
Keywords:  null, unique, column, row, constraint
The Primary Key ensures that no two records in a database contain the same value for that field. It is the field that uniquely identifies the record.
A key that uniquely identifies each record in a relational table.
The column or set of columns included in the definition of a table's PRIMARY KEY constraint. A primary key's values uniquely identify the rows in a table. Only one primary key can be defined for each table. See Also: PRIMARY KEY constraint
Keywords:  rdbms, query
semantic tag which must be present in a sentence in order for escort to retrieve the sentence.
Keywords:  zim, sql, proper, mode, client
a requirement of most SQL Servers and is required by Zim for proper operation of sets in client-server mode
Keywords:  tutorial, webdb, guide, book, search
(WebDB Tutorial Guide; search in this book)
Keywords:  keyword
an index on speed
an index (usually made automatically by the database)
an object that may contain any number of attributes