Answers.com > Wiki Answers > Categories > Technology > Software and Applications (non-game) > Duplicate tuples not allowed in a relation?

Duplicate tuples not allowed in a relation?

Answer:

In a relation we have number of tuple R ={t1,t2,t3.....tn}, nd they follow integrity constraints nd each tuple has a primary key pk.if any of the d two tuple have same attribute. for instance t1=t2 then its pk wud be same too.. but this violates the key constraint..

hence duplicacy not allowed in tuple...

enjoy

Rijo Rajan

First answer by ID1001466650. Last edit by ID1001466650. Question popularity: 5 [recommend question].

[report abuse]

Can you answer these Software and Applications (non-game) questions?

	Why you compare hardware and software results?	Answer it!
	How can piracy be stop?	Answer it!
	What is the best download software?	Answer it!
	What are the advantages and disadvantages of custom made software?	Answer it!
	Why cant you download flash player?	Answer it!

Relevant answers:

Why duplicate tuples are not allowed in DBMS?
Since relation is a set, and tuples are element of a set, according to set theory, the elements of a set are not ordered.
Why the tuples in a relation are not ordered?
A relation is defined as a set of tuples. Mathematically, elements of a set have no order among them; hence, tuples in a relation do not have any particular order. In other words, a relation is not...
What isdifferencebetween tuple relational calculus and domain relation calculus?
2 customers have more than one phone number. That is the same as "at least one customer has more than one phone number". Therefore, to record the correct customer information you must allow for more...
What relation and relation schema?
Relational Schema refers to meta-data elements which are used to describe structures and constraints of data representing a particular...
What food is allowed or not allowed in Christianity?
There is no food allowed or not allowed by Christians. There are two major teachings about food though. 1. If your culture honors God by eating or not eating certain things, then other Christians are...