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What (who) is inner join - definition
SQL CLAUSE
Outer join; Inner join; Join algorithm; Cross join; Equivalence join; Full outer join; Left outer join; Right outer join; Semi join; SQL join; Sql join; Database join; Join (sql); Join (database); Equijoin; Group join; Left join; Right join; Cartesian join; Table join; Query (database); Natural join (SQL); JOIN (SQL); Self-join; Join sql; Join statement; Inner join sql; Sql inner join; Equi-join; Straight join
inner join
<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)
left outer join
full outer join
Wikipedia
Join (SQL)
A join clause in SQL – corresponding to a join operation in relational algebra – combines columns from one or more tables into a new table. Informally, a join stitches two tables and puts on the same row records with matching fields : INNER, LEFT OUTER, RIGHT OUTER, FULL OUTER and CROSS.
