Which operations need the participating relations to union, Database Management System

Assignment Help:

Which operations need the participating relations to be union compatible?

A UNION, INTERSECTION and DIFFERENCE operations need the participating relations to be union compatible.

Related Discussions:- Which operations need the participating relations to union

Create the database in oracle using ddl, The Assessment page has a link to ...

The Assessment page has a link to download a conceptual model, and a list of data. You are to map this conceptual model, and create the database in Oracle using your own DDL. T

Lack of standards and experience, Lack of standards and experience: The la...

Lack of standards and experience: The lack of standards has considerably limited the potential of distributed DBMSs. As well, there are no tools or methodologies to help users cha

Describe the advantage of state chart diagram, Describe the advantage of St...

Describe the advantage of State chart Diagram A state chart represents a state machine, emphasizing flow of control from one state to other. A state machine is a behaviour whi

Mapping Constraints, what is Mapping Constraints? with examples

what is Mapping Constraints? with examples

E-R, Mention various steps required to draw an E-R Diagram. Draw an E-R Dia...

Mention various steps required to draw an E-R Diagram. Draw an E-R Diagram for Student Information System. Mention all suitable assumptions to justify your answer.

What is a super key, What is a super key? A super key is a set of one o...

What is a super key? A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.

Explain the check clause, Explain the Check Clause The CHECK clause is ...

Explain the Check Clause The CHECK clause is employed to at the end of a CREATE TABLE statement specify table constraints. This is known as table-based constraint because it ap

Explain group by clause in sql, Explain group By clause in SQL? Group B...

Explain group By clause in SQL? Group By clause in SQL: The GROUP BY clause can be used in a SELECT statement to collect data across multiple records and group the results thro

How does the system cope up with a record crash, How does the system cope u...

How does the system cope up with a record crash when recovery is going on after the first crash? Ans: In a system the undo and redo operations are needed to be idempotent to c

What is the use of keyword isa, What is the use of keyword ISA? The use...

What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages