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 ?
Officers from major agencies have joined forces to see how they can better work together to tackle problems such as fly-tipping, noisy neighbours, drug taking and vandalism.
The Welsh language series 'Poppleqin' or People of the Valley, which celebrates its 30th anniversary this year, joined forces with its Irish counterpart Ros Na Run to film a series on a specially built set in Spittle.
The ICPAS and AICPA recently joined forces to spotlight the importance of sound investment and risk management strategies and the CPA's role in this capacity.
will partner again with automotive legend Carroll Shelby to build high-performance vehicles, 40 years after the two first joined forces to create cars like the now-highly collectible Shelby Mustang.
where he joined forces with Cohen to form a formidable mortgage brokerage team.
For example, TV preacher Pat Robertson's American Center for Law and Justice has joined forces with radio counselor James C.
THE mothers of missing estate agent Suzy Lamplugh and Lucie Blackman, the former air hostess murdered in Japan, have joined forces to launch a travel safety guide for young people.
CWS owned travel agent Travelcare has joined forces with Tesco in a deal to offer Tesco Clubcard points on holiday and travel purchases.
network publicity, Democrats and Republicans had joined forces to merge the aesthetic of daytime TV with the hoopla of the prime-time conventions.
Officers from the Criminal Apprehension Unit of the Portsmouth Sheriff's Office, the Warrant Bureaus of the Virginia Beach and the Chesapeake Police Departments, as well as the Fugitive Squad of the Chesapeake Sheriff's Office, joined forces with the Virginia State Police Department's Fugitive Unit.
SAN DIEGO -- Quidel Corporation (NASDAQ:QDEL), a leading provider of rapid point-of-care (POC) diagnostic tests, and Cholestech Corporation have joined forces to offer an exclusive "Accu-Tame" program to dermatologists designed to ease the cumbersome process of prescribing isotretinoin for their patients, while helping them comply with iPLEDGE(TM) pregnancy testing requirements as well as lipids and liver enzymes as recommended by the manufacturer.
A GROUP of Yorkshire-based companies joined forces to highlight the benefits of strategic community-based partnerships.