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Determine the rule that a value of a foreign key should appear as a value of some particular table is called a
Ans: Referential constraint.
The rule that a value of a foreign key should appear as a value of some particular table is known as a referential constraint. (Referential integrity constraint is referred with foreign key).
Illustrate the statement 'Projection operation distributes over the union operation'. Give an example. Ans: Π L (E 1 ∪ E 2 ) = (Π L (E 1 )) ∪ (Π L (E 2 )) This says th
folding method and mid square method using visual basic
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
A constraint named less_than_20 was defined on the field date_of_birth of table student. Delete this constraint. ALTER TABLE student DROP CONSTRAINT less_than_20;
Describe the iterative and incremental life cycle For an iterative and incremental life cycle, two criteria are process and time. The main components of showing a project devel
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
Question 1: Define the term business intelligence tools? Briefly explain how the data from one end gets transformed into information at the other end? Definition Exp
What are the function of DBA?
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