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RELATIONAL ALGEBRA, COMMUTATIVE, NON-COMMUTATIVE - Coggle Diagram
RELATIONAL ALGEBRA
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CROSS PRODUCT
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Number of attributes/columns = x + y
Number of rows = m * n
There should be some common attribute as well.
SET DIFFERENCE
- Both relations should have the same set of attributes.
- Corresponding columns have the same domain (type).
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procedural query language, which takes Relation as input and generates relation as output.
PROJECTION
It gives distinct values, used to project column data from a table i.e. retrieves the distinct columns from the table
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