Related articles:
Relational model
Table (database)
Relational database
Edgar F. Codd
SQL
Tuple
Database
Algebra
Foreign key
Key terms:
relation
tuples
attribute
harriet
rename
deptname
outer join
bowtie
natural join
codd
attribute names
relational algebra
operands
setminus
forall
cartesian product
bowtie s
right outer join
common attribute names
left outer join
full outer join
binary relation
setminus p
disjunction
expression tree
tutorial d
resulting relation
distributive
relational model
expressive power
attribute names unique
selection operator
query optimization
no matching tuples
example consider the tables
relational calculus
basic operators
unary operation
simulated using
equal on their common attribute
all combinations of tuples
set intersection
relational database
contains attributes
join can be simulated
combinations with tuples
values in common attribute names
common values in common attribute
common attribute names with tuples
more formally the semantics
Search external links cited by footnotes on Wikipedia page Relational algebra:
|
|