Relational Algebra - Select Operator (Selection) - <math>\sigma</math>
Table of Contents
1 - About
The select operator is a relational operator that select the rows of a relation.
2 - Articles Related
3 - Visualisation
select vs project
4 - Notation
This can be read as:
5 - Example
Select the shirts that satisfy the condition color=blue
- Relational Algebra Notation
<MATH> \LARGE \sigma_{(color='Blue')} Shirts </MATH>
- SQL Notation
SELECT * FROM Shirts WHERE color='Blue'