Given the functional dependency R → (S,T) , then it is also true that R → S.
Given the functional dependency R → (S,T) , then it is also true that R → S.
A relation has cells that hold multi-value entries.
A relation has cells that hold multi-value entries.
If attributes A and B determine attribute C, then it is also true that:
If attributes A and B determine attribute C, then it is also true that:
A primary key is a composite key that was selected to be the main identifier for the relation.
A primary key is a composite key that was selected to be the main identifier for the relation.
A relation is in 5NF when multivalued dependencies are isolated in their own relation.
A relation is in 5NF when multivalued dependencies are isolated in their own relation.
Table is synonymous with the term:
Table is synonymous with the term:
A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key.
A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key.
One solution to the multivalued dependency constraint problem is to:
One solution to the multivalued dependency constraint problem is to:
In the relational model, relationships between relations or tables are created by using:
In the relational model, relationships between relations or tables are created by using:
An attribute is a(n):
An attribute is a(n):
In a relation, the rows are sometimes called "fields".
In a relation, the rows are sometimes called "fields".
A key is a group of one or more attributes that uniquely identifies a row.
A key is a group of one or more attributes that uniquely identifies a row.
The only reason for the existence of relations is to store instances of functional dependencies.
The only reason for the existence of relations is to store instances of functional dependencies.
A relation in this form is free of all modification anomalies.
A relation in this form is free of all modification anomalies.
A relation is in this form if it is in BCNF and has no multivalued dependencies:
A relation is in this form if it is in BCNF and has no multivalued dependencies:
Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:
Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:
A tuple is a(n):
A tuple is a(n):
Given the functional dependency R → S , R is called the determinant.
Given the functional dependency R → S , R is called the determinant.
Keys made up of two or more attributes are called composite keys.
Keys made up of two or more attributes are called composite keys.
In a relation, the columns are sometimes called "attributes".
In a relation, the columns are sometimes called "attributes".
A candidate key is a determinant that determines all the other columns is a relation.
A candidate key is a determinant that determines all the other columns is a relation.
The functional dependency R → S means that the value of S can be determined when we are given a value of R.
The functional dependency R → S means that the value of S can be determined when we are given a value of R.
Any table that meets the definition of a relation is said to be in first normal form.
Any table that meets the definition of a relation is said to be in first normal form.
A primary key is a composite key that was selected to be the main identifier for the relation.
A primary key is a composite key that was selected to be the main identifier for the relation.
A primary key is a composite key that was selected to be the main identifier for the relation.
A primary key is a composite key that was selected to be the main identifier for the relation.
Row is synonymous with the term:
Row is synonymous with the term:
In a relation, the order of the columns does not matter.
In a relation, the order of the columns does not matter.
A functional dependency is a relationship between or among attributes.
A functional dependency is a relationship between or among attributes.
A relation is considered a:
A relation is considered a:
If attribute A determines both attributes B and C, then it is also true that:
If attribute A determines both attributes B and C, then it is also true that:
When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):
When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):
Relations are categorized into normal forms according to the referential integrity constraints that they have.
Relations are categorized into normal forms according to the referential integrity constraints that they have.
In a relation, the rows are sometimes called "records".
In a relation, the rows are sometimes called "records".
The different classes of relations created by the technique for preventing modification anomalies are called:
The different classes of relations created by the technique for preventing modification anomalies are called:
A functional dependency is always an equation.
A functional dependency is always an equation.
For some relations, changing the data can have undesirable consequences called:
For some relations, changing the data can have undesirable consequences called:
Which of the following is not a restriction for a table to be a relation?
Which of the following is not a restriction for a table to be a relation?
In a relation, the order of the rows matters.
In a relation, the order of the rows matters.
Which of the following is a group of one or more attributes that uniquely identifies a row?
Which of the following is a group of one or more attributes that uniquely identifies a row?
A functional dependency is a relationship between or among:
A functional dependency is a relationship between or among:
A relation is a two-dimensional table.
A relation is a two-dimensional table.
The primary key is selected from the:
The primary key is selected from the:
A primary key is a composite key that was selected to be the main identifier for the relation.
A primary key is a composite key that was selected to be the main identifier for the relation.
