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D426 WGU NEWEST EXAM WITH 200 REVIEW QUESTIONS & CORRECT VERIFIED ANSWERS ALREADY GRADED A+/ WESTERN GOVERNORS UNIVERSITY D027 ACTUAL EXAM (LATEST$18.49
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D426 WGU 2024-2025 NEWEST EXAM WITH 200 REVIEW
QUESTIONS & CORRECT VERIFIED ANSWERS ALREADY
GRADED A+/ WESTERN GOVERNORS UNIVERSITY D027
ACTUAL EXAM (LATEST)
database application
software that helps business users interact with database
systems.
database administrator
responsible for securing the database system against
unauthorized users. and enforces procedures for user
access and database system availability.
,authorization
Many database users should have limited access to
specific tables, columns, or rows of a database. Database
systems authorize individual users to access specific data.
rules
Database systems ensure data is consistent with
structural and business rules
query processor
interprets queries, creates a plan to modify the database
or retrieve data, and returns query results to the
application.
query optimization
ensure the most efficient instructions are executed on
the data.
,storage manager
translates the query processor instructions into low-level
file-system commands that modify or retrieve data.
Database sizes range from megabytes to many terabytes,
so the storage manager uses indexes to quickly locate
data.
transaction manager
ensures transactions are properly executed. The
transaction manager prevents conflicts between
concurrent transactions. The transaction manager also
restores the database to a consistent state in the event of
a transaction or system failure.
INSERT
inserts rows into a table
, SELECT
retrieves data from a table
UPDATE
modifies data in a table
DELETE
deletes rows in a table
CREATE TABLE
creates a new table by specifying the table and column
names. Each column is assigned a data type that indicates
the format of column values. Data types can be numeric,
textual, or complex.
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