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WGU D NEWEST EXAM WITH 200 REVIEW QUESTIONS & CORRECT VERIFIED ANSWERS ALREADY GRADED A+/ WESTERN GOVERNORS UNIVERSITY D027 ACTUAL EXAM (LATEST)$18.99
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WGU D426 2024-2025 NEWEST EXAM WITH 200
REVIEW QUESTIONS & CORRECT VERIFIED
ANSWERS ALREADY GRADED A+/ WESTERN
GOVERNORS UNIVERSITY D027 ACTUAL EXAM
(LATEST)
A ____ is a column, or group of columns, used to identify
a row. - ✔✔ANSWER✔✔-Primary key
A ____ consists of a single column. - ✔✔ANSWER✔✔-
Simple primary key
A ____ key consists of multiple columns. -
✔✔ANSWER✔✔-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. - ✔✔ANSWER✔✔-
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. - ✔✔ANSWER✔✔-Primary key
, An _____ is a numeric column that is assigned an
automatically incrementing value when a new row is
inserted. - ✔✔ANSWER✔✔-Auto-increment column
The ____ keyword defines an auto-increment column. It
follows the column's data type in a CREATE TABLE
statement. - ✔✔ANSWER✔✔-AUTO_INCREMENT
A ____ is a column, or group of columns, that refer to a
primary key. - ✔✔ANSWER✔✔-Foreign key
____ requires foreign key values must either be NULL or
match some value of the referenced primary key. -
✔✔ANSWER✔✔-Referential integrity
A ____ constraint is added to a CREATE TABLE
statement with the ____ and REFERENCES keywords. -
✔✔ANSWER✔✔-Foreign key; references
A ____ foreign key is a simple or composite foreign key in
which all columns are NULL. - ✔✔ANSWER✔✔-Fully
NULL
____ is a relational rule that requires foreign key values to
either be fully NULL or match some primary key value. -
✔✔ANSWER✔✔-Referential integrity
____ rejects an insert, update, or delete that violates
referential integrity. - ✔✔ANSWER✔✔-RESTRICT
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