Join may refer to: *

Join (law) In law, a joinder is the joining of two or more legal issues together. Procedurally, a joinder allows multiple issues to be heard in one hearing or trial and occurs if the issues or parties involved overlap sufficiently to make the process more e ...

, to include additional counts or additional defendants on an indictment *In mathematics: **

Join (mathematics) In mathematics, specifically order theory, the join of a subset S of a partially ordered set P is the supremum (least upper bound) of S, denoted \bigvee S, and similarly, the meet of S is the infimum (greatest lower bound), denoted \bigwedge S. ...

, a least upper bound of sets orders in lattice theory **

Join (topology) In topology, a field of mathematics, the join of two topological spaces A and B, often denoted by A\ast B or A\star B, is a topological space formed by taking the disjoint union of the two spaces, and attaching line segments joining every point in ...

, an operation combining two topological spaces ** Join (category theory), an operation combining two categories **

Join (simplicial sets) In higher category theory in mathematics, the join of simplicial sets is an operation making the category of simplicial sets into a monoidal category. In particular, it takes two simplicial sets to construct another simplicial set. It is closely ...

, an operation combining two simplicial sets **

Join (sigma algebra) Join may refer to: * Join (law), to include additional counts or additional defendants on an indictment *In mathematics: ** Join (mathematics), a least upper bound of sets orders in lattice theory ** Join (topology), an operation combining two top ...

, a refinement of sigma algebras ** Join (algebraic geometry), a union of lines between two varieties *In computing: **

Join (relational algebra) In relational algebra, a join is a binary operation, written as R \bowtie S where R and S represent relations, that combines their data where they have a common attribute. Natural join Natural join (⨝) is a binary operator that is written as ...

, a binary operation on tuples corresponding to the relation join of SQL ***

Join (SQL) A join clause in the Structured Query Language (SQL) combines column (database), columns from one or more table (database), tables into a new table. The operation corresponds to a Join (relational algebra), join operation in relational algebra. In ...

, relational join, a binary operation on SQL and relational database tables ***

join (Unix) join is a command in Unix and Unix-like operating systems that merges the lines of two sorted text files based on the presence of a common field. It is similar to the join operator used in relational databases but operating on text files. Overv ...

, a Unix command similar to relational join **

Join-calculus The join-calculus is a process calculus developed at INRIA. The join-calculus was developed to provide a formal basis for the design of distributed programming languages, and therefore intentionally avoids communications constructs found in other pr ...

, a process calculus developed at INRIA for the design of distributed programming languages ***

Join-pattern Join-patterns provides a way to write concurrent, parallel and distributed computer programs by message passing. Compared to the use of threads and locks, this is a high level programming model using communication constructs model to abstra ...

, generalization of Join-calculus ***

Joins (concurrency library) Joins is an asynchronous concurrent computing Application Programming Interface, API (Join-pattern) from Microsoft Research for the .NET Framework. It is based on join calculus and makes the concurrency constructs of the Cω language available as a ...

, a concurrent computing API from Microsoft Research * Join Network Studio of NENU, a non-profit organization of Northeast Normal University * Joins.com, the website for South Korean newspaper ''JoongAng Ilbo'' *

Joining (woodworking) Join may refer to: * Join (law), to include additional counts or additional defendants on an indictment *In mathematics: ** Join (mathematics), a least upper bound of sets orders in lattice theory ** Join (topology), an operation combining two top ...

, woodworking processes of combining two or more pieces of wood together, generally through the use of nails.

See also