<
database> (Commonly "join", but see also "
outer join") A
relational database operation which selects rows from two
tables such that the value in one
column of the first table also appears in a certain column of the second table.
An example in
SQL:
select * from A, B where A.x = B.y
The column names (x and y in this example) are often, but not necessarily, the same.
(1998-11-23)