Top "Natural-join" questions

A natural join is a relational operation that joins on the like-named attributes between tables

Difference between natural join and inner join

What is the difference between a natural join and an inner join?

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Lossless Join Property

Can someone please explain to me what is meant by the lossless join property in a relation schema? Is it …

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Join tables on columns of composite foreign / primary key in a query

CREATE TABLE subscription ( magazine_id bigint, user_id bigint, PRIMARY KEY (magazine_id, user_id) ); CREATE TABLE delivery ( magazine_id …

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Oracle USING clause best practice

Disclaimer: I'm a developer and not a DBA. I've been a huge fan of the USING clause in Oracle since …

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maximum and minimum number of tuples in natural join

I came across a question that states Consider the following relation schema pertaining to a students database: Student (rollno, name, …

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Natural join with more than one common attribute in two tables

I can understand how natural join works when the two tables have only one common attribute. What if they have …

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Difference between cross product (cross join, Cartesian product) and natural join

While writing in SQL, how would I know if I should use cross product (cross join, Cartesian product) or natural …

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MySQL NATURAL LEFT OUTER JOIN vs LEFT OUTER JOIN

If I have the following situations: **table 1 person| money A | 2 B | 10 ------------- **table 2 person| cars A | 3 C | 10 --------------- What is …

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How to do natural join when the common column have different names?

I need to do natural join on two tables named Customers and Addresses (relationship 1:1), the common column in those tables …

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