antijoin

antijoin
A type of join, denoted by , such that R▷S yields only those tuples in R for which S has no corresponding tuple of the same value.

Wikipedia foundation.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Relational algebra — Not to be confused with Relation algebra. Relational algebra, an offshoot of first order logic (and of algebra of sets), deals with a set of finitary relations (see also relation (database)) that is closed under certain operators. These operators …   Wikipedia

  • antidivision — 1. adjective Opposing or countering geopolitical division. Much of the northern antidivision sentiment in 1887 was rooted in the fear that statehood for the southern half alone might doom the north to indefinite territorial status. 2. noun A… …   Wiktionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”