Top "Relational-algebra" questions

Relational Algebra is an offshoot of first-order logic and of the algebra of sets that deals with relations (sets of tuples).

Difference between a theta join, equijoin and natural join

I'm having trouble understanding relational algebra when it comes to theta joins, equijoins and natural joins. Could someone please help …

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What are projection and selection?

What is the difference between projection and selection? Is it: Projection --> for selecting the columns of table; and …

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What is the difference between Select and Project Operations

I'm referring to the basic relational algebra operators here. As I see it, everything that can be done with project …

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How can I find MAX with relational algebra?

Working with databases, how can I find MAX using relational algebra?

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Converting SQL to relational algebra

Does anyone know any good online resources which I can use to practise SQL to relational algebra conversion?

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What is a Projection?

What is a Projection, in terms of database theory and NHibernate when using SetProjection()?

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Algebra Relational sql GROUP BY SORT BY ORDER BY

I wanted to know what is the equivalent in GROUP BY, SORT BY and ORDER BY in algebra relational ?

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Insertion Anomaly

I am learning insertion anomaly from here. Following data is written in it, Insert Anomalies An Insert Anomaly occurs when …

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Selecting DISTINCT rows in relational algebra

There is a DISTINCT operator in SQL. However, I have an assignment in which I need to get some distinct …

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Difference between Relational Algebra and Relational calculus

What is the exact difference between relational algebra and relational calculus. At most of the reference, it will be Relational …

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