WGU D426 V2 Exam
Containing 160 terms with
Definitive Solutions 2024.
The relationship (within the relation) that describes how the
value of one attribute may be used to find the value of
another attribute.
❖ Functional Dependency
An attribute that can be used to find the value of another
attribute in the relation.
❖ Determinant
Value can be used to find the value of every other non-key
attribute in the table. Unique and minimal.
❖ Candidate Key
Define & manage database structures
❖ DDL
Adding, deleting, and modifying data - Manipulates data
stored in a database.
❖ DML
Used to create user accounts, manage permissions and
access.
, ❖ DCL
Includes CREATE, DROP, ALTER, TRUNCATE, RENAME
❖ DDL
A view created and stored on the database. Underlying data
is changed and also updated in this view. Uses memory
space.
❖ Materialized View
Not stored in memory. Only computed when used or
accessed.
❖ Virtual View
The data about the data. Describes elements such as
columns, names, and data type.
❖ Metadata
Ordered collection of elements in parentheses.
❖ Tuple
% of table rows selected by a query
❖ Hit Ration
Reads blocks directly, without accessing an index.
❖ Table Scan
Reads index blocks sequentially in order to locate the needed
table blocks.
❖ Index Scan
, Database repeatedly splits the index in two until it finds a
match.
❖ Binary Search
Database object that maps one or more tables to a single file.
❖ Tablespace
Specifies tables, columns, and keys. Implements database
requirements in a specific database system. Also called a
schema.
❖ Logical Design
Specifies indexes, table structures, and partitions. Specifies
how tables are organized on storage media.
❖ Physical Design
Components of a computer system and the relationships
between components.
❖ Architecture
Interact directly with database users and administrators and
send queries to the query processor. Includes Connectors &
APIs, Workbench, and utility programs.
❖ Tools
Interprets queries. Compiles queries into low-level
instructions for the storage engine. Creates a plan to modify
the database or retrieve data, and returns query results to
the application.
❖ Query Processor
Containing 160 terms with
Definitive Solutions 2024.
The relationship (within the relation) that describes how the
value of one attribute may be used to find the value of
another attribute.
❖ Functional Dependency
An attribute that can be used to find the value of another
attribute in the relation.
❖ Determinant
Value can be used to find the value of every other non-key
attribute in the table. Unique and minimal.
❖ Candidate Key
Define & manage database structures
❖ DDL
Adding, deleting, and modifying data - Manipulates data
stored in a database.
❖ DML
Used to create user accounts, manage permissions and
access.
, ❖ DCL
Includes CREATE, DROP, ALTER, TRUNCATE, RENAME
❖ DDL
A view created and stored on the database. Underlying data
is changed and also updated in this view. Uses memory
space.
❖ Materialized View
Not stored in memory. Only computed when used or
accessed.
❖ Virtual View
The data about the data. Describes elements such as
columns, names, and data type.
❖ Metadata
Ordered collection of elements in parentheses.
❖ Tuple
% of table rows selected by a query
❖ Hit Ration
Reads blocks directly, without accessing an index.
❖ Table Scan
Reads index blocks sequentially in order to locate the needed
table blocks.
❖ Index Scan
, Database repeatedly splits the index in two until it finds a
match.
❖ Binary Search
Database object that maps one or more tables to a single file.
❖ Tablespace
Specifies tables, columns, and keys. Implements database
requirements in a specific database system. Also called a
schema.
❖ Logical Design
Specifies indexes, table structures, and partitions. Specifies
how tables are organized on storage media.
❖ Physical Design
Components of a computer system and the relationships
between components.
❖ Architecture
Interact directly with database users and administrators and
send queries to the query processor. Includes Connectors &
APIs, Workbench, and utility programs.
❖ Tools
Interprets queries. Compiles queries into low-level
instructions for the storage engine. Creates a plan to modify
the database or retrieve data, and returns query results to
the application.
❖ Query Processor
