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A super key is an attribute or set of attributes used to recognize the records uniquely in a relation.
For instance, in the Relation PERSON defines earlier PERSON_ID is a super key since PERSON_ID is unique for every person. Likewise (PERSON_ID, AGE) and (PERSON_ID, NAME) are also super keys of the relation PERSON as their combination is also unique for each record.
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
Explain the term- Periodic recomputation Periodic recomputation: Base values are often updated in bunches. Sometimes, it is possible to just recompute all derived attributes p
Explain the terms primary key, candidate key, alternate key and secondary key. In the given table identify every key? STUDENT(SID,Regno, Name, City) Primary Key: The prim
What are the several kinds of the update operations on relations? Also explain the constraints on these update operation. Give instance in support of your answer. There are th
, write the relational schema, and draw the new dependency diagrams. Identify the normal forms for each table structure you created
What sorts of tables one can se in designing the hierarchy of a LDB? Tables, which are having Foreign Key relations.
A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.
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