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 ?
RIVAL residents associations have joined battle over a controversial development in a well-to-do city suburb.
He took part in various pitched battles during the British campaign against the rebels - on one occasion he was part of a regiment of just 550 men which joined battle against a force of 9,000.
WHITE HOT PROPERTY: have joined battle to South Africa Jake White
As to non-British involvement Mr Roberts rightly says there is no point in asking if Wellington could have won without Prussian, Dutch and Belgian assistance because he would never have joined battle without these troops.
Because this is how things were in the 'good old days', when Welsh choirs joined battle, with no quarter given.
Two High Street rivals joined battle with their latest collections yesterday, and the look was deceptively casual.
Under glowering skies, with the threat of rain imminent, the third and fourth-placed teams joined battle on amuddy pitch which made nifty footwork and ball control difficult.
This pair joined battle in earnest at the top of the straight, but once Nakatani asked Aragorn for his effort, the issue was quickly settled.
Three days later at dawn the ships again joined battle after which the French frigate again escaped as the disabled British vessel had to halt to repair extensive damage.
RARE SIGHT Lord Ashcroft in Westminster yesterday WARNING Mr Darling has joined battle