Exam 6: Normalization of Database Tables

A relational table must not contain ____________________ groups.

A relational table must not contain a(n)____.

In _________________________ no row may contain two or more multivalued facts about an entity.

When a nonkey attribute is the determinant of a key attribute the table is in 3NF but not _________________________.

The most likely data type for a surrogate key is ____.

A table is in BCNF if every determinant in the table is a foreign key.

A table is in 4NF if it is in 3NF and ____.

According to the Data-Modeling Checklist,____________________ should be nouns that are familiar to business and should be short and meaningful,and should document abbreviations,synonyms,and aliases for each entity.

Because a partial dependency can exist only if a table's primary key is composed of several attributes,if a table in 1NF has a single-attribute primary key,then the table is automatically in 2NF.

The conflicts between design efficiency,information requirements,and processing speed are often resolved through ____.

When designing a database,you should ____.

A table is in 2NF if it is in 1NF and it includes no partial dependencies.

If you have three different transitive dependencies,____ different determinant(s)exist.

The advantage of higher processing speed must be carefully weighed against the disadvantage of data anomalies.

A(n)____________________ derives its name from the fact that a group of multiple entries of the same type can exist for any single key attribute occurrence.

From a strictly database point of view,____ attribute values can be calculated when they are needed to write reports or invoices.

Describe a dependency diagram and explain its purpose.

In a(n)____ diagram,the arrows above the attributes indicate all desirable dependencies.

A table that has all key attributes defined,has no repeating groups,and all its attributes are dependent on the primary key,is said to be in ____.

A ____ derives its name from the fact that a group of multiple entries of the same type can exist for any single key attribute occurrence.