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Why do you designate one of the candidate key of relation to be the primary key?
We designate one of the candidate key of a relation to be a primary key because that primary key is use for any foreign key references.
Is the relation a function?
Not every relation is a function. But every function is a relation. Function is just a part of relation.
What is the relation between point and line?
walang relation
What is a relation in algebra?
A relation is anything on a cartesian plane (a graph).
When does a relation be a function?
A function is a relation whose mapping is a bijection.
What is the recursive foreign key?
References its own relation
What is foreign policy?
Foreign Policy is how the country will interact with non-state actors.
What is the president's responsibility to the aspect of foreign relation's'?
eat vagina flaps fly:P
Who acted as advisors controlled public finances and handle foreign relation?
Senate
Explain two rules in relational model of database systems?
1) Entity Integrity: In a base relation, no attribute of a primary key can be null. 2) Referential Integrity: If foreign key exists in a relation, either foreign key value must match a candidate key value of some tuple in its home relation or foreign key value must be wholly null
Using foreign key on ER diagram?
Foreign keys isnt drawn at a ER-diagram. The relation drawn between entities is enough to show, that der is at foreign key
What and who determines a great power in international relation?
Economics, Military, Stability and Immunity from foreign aggression.
What did the Foreign Office do?
The Foreign Office is the governmental department responsible for promoting and protecting the national interests of the country in relation to other countries and international organizations. It oversees foreign affairs, diplomacy, and international relations.
Why do you designate one of the candidate key of relation to be the primary key?
We designate one of the candidate key of a relation to be a primary key because that primary key is use for any foreign key references.
What is difference between primary key and foreign key?
A primary key is an attribute (or combination of attributes) that uniquely identifies each row in a relation. A primary key is designated by underlining the attribute name. The primary key of an entity set allows us to distinguish among the various entities of the set. A foreign key is an attribute in a relation of database that serves as the primary key of another relation in the same database.
What rule states that either each foreign key value must match a primary key value in another relation or the foreign key value must be null?
referential integrity constraint
How did the Lord change His usual procedure with foreign nations in relation to Cyrus of Persia?
In relation to Cyrus of Persia, the Lord changed His usual procedure with foreign nations by calling Cyrus His "anointed" and using him as an instrument to accomplish His purposes. The Lord also allowed Cyrus to release the Jews from their captivity in Babylon and to help them rebuild their temple in Jerusalem.
