Interested to Buy Any Domain ? << Click Here >> for more details...
what is the difference between relational calculus and
relational algebra ?
- 6 Answers
- 25827 Views
- TCS, I also Faced
- E-Mail Answers
Answer Posted / megha aditya
relational algebra easy to manipulate then relational calculus..
modifications are easy in queries of relational algebra... then in relational calculus
| Is This Answer Correct ? | 7 Yes | 5 No |
Post New Answer View All Answers
Write a query to get maximum and second maximum in oracle?
How to do Data integrity testing? Who does this testing (Developer or tester)?
What is ole db used for?
What are the validations performed on the source data? If there are junk data available in the source data, how to eliminate it?
What are the most common databases?
can i use the commands "modify" and Change in DB2 to alter my column datatype and its name in a table?
There are three servers are run by Oracle, MS Access and .Net. What are the procedure fetching the values of two variables from two servers among these?
How is image stored in database?
query to Compare data of two tables between two different Databases(Oracle and SQL Server) Eg., Source Database: Oracle Table: Employee Target Database : SQL Server Table : emp
What is the difference between a stored procedure and a query?
aht is the difference b/w network & hierarchial & relational dbms????
Explain entity type?
How to do Data size testing? Who does this testing (Developer or tester)?
What is the use of default key?
london school of science and technology has a software development unit,known as lsst solutions,which is responsible for developing and implementing software throughout the collegejames tristan keeps a record of all student details in the college including student id,name,and start date and phone number.There are many courses offered by LSST. For example MBA, MSc, BSc, BABS, DF, English etc. Each course id identified by course id, description, duration. Each course has many semesters. Each semester takes place during a particular term. Semester details and term details are required to be stored in the database. Each course has many subjects and same subject may be offered in many courses. For each subject many details such as Subject code, name, result and attendance are required to be stored. Every subject has mainly two assessments; one assignment and one exam. Assignment is worth of 30% and exam 70% respectively. You have been appointed as a database designer. Your job is to provide ERD with all possible entities and relationships. Note: Feel free to make necessary assumptions 3: Assignment Tasks. 1. Create an ERD for the above problem 2. Translate the ERD to Relational Data model (RDM) 3. Implement the RDM by creating the tables 4. Populate the database with your own data. 5. SQL Queries for the following tasks a. List all student details in each course along with course details b. Count and display number of students in each course. c. List student name, course name, assessment description, marks for all students.
