Describe the different operations of relational algebra

Assignment Help Database Management System
Reference no: EM1386294

Describe relationships with the example. Also illustrate degree of relationship for that example. Describe the different operations of relational algebra with suitable example each.

Write down SQL query for the following

i. To locate student who scored more than ‘Rashmi' in computer Science subject.
ii. Write all the students who belongs to class II

Reference no: EM1386294

Questions Cloud

Neighbor frequencies of double stranded dna molecule : The interaction between bases on different strands of DNA molecules depends somewhat on the identities of neighboring bases. For example, the melting temperature of an oligonucleotide
Average difference in reaction times : We are certain the the average difference in reaction times between the two light types for all golfers is between 0.27 and 7.13.
Language diversity play in critical thinking : What role does language and language diversity play in critical thinking? How does language empower or limit the expression of our thoughts?
Cell free culture fluid : One of the experiments investigates the activity of V. harveyi BB170 and V. harveyi BB886 in the presence of 10 percent cell-free culture fluid from E.
Describe the different operations of relational algebra : Describe relationships with the example. Also illustrate degree of relationship for that example. Describe the different operations of relational algebra with suitable example each.
Traditional file systems and modern database environment : Write down the difference between traditional file systems Vs modern database environment. Describe the following: Physical data independence Vs logical data independence
Explain effects of fiscal policies on economy-s production : Explain effects of fiscal policies on economy's production and employment. How do changes in government spending and taxes positively or negatively influence economy's production and employment?
Mosses fern and gymnosperms to the life cycle : Discuss the difference and similarities between mosses fern and gymnosperms to their life cycle? and how did they adapt to a land environment?
Recognize each dependency by type using code : Recognize each dependency by type; write the two instructions involved; recognize which instruction is dependent; and name storage location involved.

Reviews

Write a Review

Database Management System Questions & Answers

  Write sql queries for the books database

Write SQL queries for the books database that perform each of the following tasks: Select all authors from the Authors table with the columns in the order lastName, firstName and authorID.

  Explain database models-hierarchical and relational

Explain each of three database models, hierarchical, relational, and object-oriented, and provide specific referenced example of each of these model types implemented in a functioning database

  Patients post cardiac bypass surgery

Monitor Renal Outcomes in patients post cardiac bypass surgery?

  What rules have to be enforced based on entity type

What rules would have to be enforced based on entity type? Choose one entity type and discuss what enforcement is needed by the database or application.

  What is recovering database via rollforward

What is Recovering a database via rollforward? What is aim of transaction log? What is contained in transaction log?

  Database triggers are utilized to record logins by users

Several times, database triggers are utilized to record logins by users. Here is the example of login trigger that inserts row into table every time a user connects.

  Describing the purpose of database an its functionality

Describing the purpose of database an its functionality, plus a detailed E-R diagram.

  Evaluate a dbms in terms of lock granularity

Suppose you are asked to evaluate a DBMS in terms of lock granularity and the different locking levels. Create a simple database environment in which these features would be important.

  Explain thoughts on database design process

Explain thoughts on database design process this far. You have learned about first three phases of process: defining mission statement and mission objectives, analyzing current database, and creating data structures.

  Develop preliminary database tables for huffman trucking log

Use Microsoft Access to develop preliminary (no keys and no relationships) database tables for Huffman Trucking Driver Log.

  Importance have button that takes you back to main page

What is the importance to have a button that takes you back to the main page on each web page? How does dead end or orphan pages affect the continuity of a website?

  Use of dictionary-managed tablespaces in database

our current database uses dictionary-managed tablespaces. In running various performance tuning scripts, you have discovered that one of these tablespaces seems to have run out of space long before you calculated that it would.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd