C.J.Date, one of the creators of the relational database model, and a
team lead on the original DB2, created this 900 word dictionary of
relational database terms as a handy reference. The reason for the book
is that over half the terms are common English, like "data definition,
join, attribute, predicate, index, cube, key, DDS, table..." and when
they are defined, even worse, the definitions are imprecise. It is a
chore to find their true relational database meaning online. A version
of the book with 586 definitions was published by O'Reilly and feedback
from that book, along with numerous updates, led to this 900 word book.