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What is an Operand?
The data on which the operation is to be performed is known as an Operand
How does a query tree represent a relational algebra expression? Discuss any three rules for query optimisation, giving example as to when should each rule be applied. Ans
in an organization several projects are undertaken. Each project can employ one or more employees. Each employee can work on one or more projects. Each project is undertaken on the
Question: AirwaysCentre, an international airline booking company currently uses a relational database system for their operations, which includes the following relations: P
I need some help with my normalization database homework.
What is an E-R model? Draw an E-R Diagram for the company database with following Descriptions? The company is organized within departments. Each department has a unique name a
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Question: This question refers to the database schema. a) Express the following queries in SQL: (i) Write the SQL code that will create the table Company. Your answer sh
What is the role of ORDER By Clause? ORDER BY clause: The ORDER BY clause permits you to sort the records in your result set. The ORDER BY clause can just be used in select s
Describe in brief about the Sequence Diagrams Sequence diagrams are interaction diagrams which emphasize time ordering of messages. In UML, it is shown as a table which shows
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