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Explain what is Aggregation ?
Aggregation: This is used whenever we intend to show a relationship between an entity and the relationship. There is no provision for this in the ER Model. This is shown by placing the relationship between two entities along with the entities in a box and setting up a relationship between this box and another entity.
Submit the table creation statements (including constraints) for the Database Model. Submit them all in a single script file. Also submit a document explaining what test data yo
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
You are required to implement integrity constraints within the database to enforce the following requirements: For Projects: Start date must be supplied. Start date cannot be i
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
how many hourse have been spent on a certain project
Which database object does not physically exist? A view database object does not physically exist.
What is the full form of DDL? DDL is stand for Data Definition Language.
During the deletion of a tuple two cases can happen: Deletion of tuple in relation having the foreign key: In this type of case simply delete the desired tuple. For example, in
Define single valued and multivalued attributes. Single valued attributes: attributes with a single value for a particular entity are known as single valued attributes. M
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