WGU D469 V2-Questions All Solved (A Pass) 2026
Update
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
Link between tools and query processor
Connection
Creates connections and manages communication between tools and query parser.
Connection Manager
Update
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
Link between tools and query processor
Connection
Creates connections and manages communication between tools and query parser.
Connection Manager
