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Define tuple variable?
Tuple variables are used for comparing two tuples in the same relation. The tuple variables are explained in the from clause by way of the as clause.
E-R model uses this symbol to represent weak entity set ? A Doubly outlined rectangle symbol is used to represent weak entity set.
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
FDs in Relationships: Enrols Relationship: None as it is many to many Teaches Relationship : Course code → Instructor Instructor → Course code The next question is:
I have a small project that contains 3 deliverable s. I have done the first one and I would like you to help me with second one
Discuss The difference between drop table R and delete from R. DROP TABLE command deletes all the records with the table definition. This command will automatically committed
How are tables stored on Disk? We realise that every record of a table can have different amounts of data. This is due to in some records; some attribute values may be "zero".
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
What are the benefits of OOA technology? Using OOA technology can produce many benefits, such as: i) Reusability of code ii) Productivity is gained through direct mappi
what is database management system? & why it is required?
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