A ____ is a column, or group of columns, used to identify a row. - Primary key
A ____ consists of a single column. - Simple primary key
A ____ key consists of multiple columns. - Composite primary
All primary keys columns are necessary for uniqueness. When any column is removed,
the resulting simple or composite column is no longer unique. - Minimal
The ____ constraint in the CREATE TABLE statement names the table's ____. The
____ constraint ensures that a column or group of columns is always unique and non-
null. - Primary key
An _____ is a numeric column that is assigned an automatically incrementing value
when a new row is inserted. - Auto-increment column
The ____ keyword defines an auto-increment column. It follows the column's data type
in a CREATE TABLE statement. - AUTO_INCREMENT
A ____ is a column, or group of columns, that refer to a primary key. - Foreign key
____ requires foreign key values must either be NULL or match some value of the
referenced primary key. - Referential integrity
A ____ constraint is added to a CREATE TABLE statement with the ____ and
REFERENCES keywords. - Foreign key; references
A ____ foreign key is a simple or composite foreign key in which all columns are NULL.
- Fully NULL
____ is a relational rule that requires foreign key values to either be fully NULL or match
some primary key value. - Referential integrity
____ rejects an insert, update, or delete that violates referential integrity. - RESTRICT
____ sets invalid foreign keys to NULL. - SET NULL
____ sets invalid foreign keys to the foreign key default value. - SET DEFAULT
____ propagates primary key changes to foreign keys. - CASCADE
, Actions are specified in the optional ____ and ____ clauses of the FOREIGN KEY
constraint. ____ and ____ are followed by either RESTRICT, SET NULL, SET
DEFAULT, or CASCADE. - ON UPDATE and ON DELETE
A ____ is a rule that governs allowable values in a database. ____ are based on
relational and business rules, and implemented with special keywords in a CREATE
TABLE statement. The database automatically rejects insert, update, and delete
statements that violate a constraint. - Constraint(s)
A ____ appears after the column name and data type in a CREATE TABLE statement.
Column constraints govern values in a single column. - Column constraint
A ____ appears in a separate clause of a CREATE TABLE statement and governs
values in one or more columns. - Table constraint
The ____ constraint ensures that values in a column, or group of columns, are unique. -
UNIQUE
The ____ constraint specifies an expression on one or more columns of a table. The
constraint is violated when the expression is FALSE and satisfied when the expression
is either TRUE or NULL. - CHECK
Table ____ may be names using the optional CONSTRAINT keyword, followed by the
constraint name and declaration. - CONSTRAINT
An ____ is a high-level representation of data requirements, ignoring implementing
details. - Entity-relationship model
An ____ is a person, place, product, concept, or activity. - Entity
A ____ is a statement about two entities. - Relationship
An ____ is a descriptive property of an entity. - Attribute
A ____ relates an entity to itself. - Reflexive relationship
An ____, commonly called an ER diagram, is a schematic picture of entities,
relationships, and attributes. - Entity-relationship diagram (ER diagram)
A ____, also known as a ____ or ____, documents additional detail in text format. -
Glossary; data dictionary; repository
An ____ is a set of things. Ex: All employees in a company. - Entity type
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