join

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join

[jȯin]
(computer science)
A portion of a robotic control program that directs an activity to resume after it has been interrupted.
(mathematics)
The join of two elements of a lattice is their least upper bound.

join

(database)
inner join (common) or outer join (less common).

join

(theory)

join

In relational database management, to match one table (file) against another based on some condition creating a third table with data from the matching tables. For example, a customer table can be joined with an order table creating a table for all customers who purchased a particular product.

The default type of join is known as an "inner" join. It produces a resulting record if there is a matching condition. For example, matching shipments with receipts would produce only those shipments that have been received. On the other hand, an "outer" join using that example would create a record for every shipment whether or not it was received. The data for received items would be attached to the shipments, and empty, or null, fields would be attached to shipments without receipts.


A Simple Join
This example matches the sales table against the product table based on product number to derive the product description.
References in periodicals archive ?
While World magazine, which sounded the alarm, was scolded for joining battle in hysterical and sarcastic tones, the translators were compelled to explain in what sense it was "accurate" to render masculine terms neuter, singulars plural, or produce grammatical whimsies like "everyone.
Considering we are now the third most profitable in Britain, only joining battle in recent years, that's a clear indication of what can be achieved.
Lochside Bait and Tackle and Ayr Nomads will be joining battle in an attempt to bring the title to Scotland for the first time.