WGU D426 OBJECTIVE ASSESMENT WITH QUESTIONS AND WELL VERIFIED ANSWERS || GUARANTEED PASS || BEST VERSION || LATEST EXAM
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WGU D426 OBJECTIVE ASSESMENT
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WGU D426 OBJECTIVE ASSESMENT
WGU D426 OBJECTIVE ASSESMENT WITH
QUESTIONS AND WELL VERIFIED ANSWERS ||
GUARANTEED PASS || BEST VERSION || LATEST
EXAM
The HAVING clause is used with the GROUP BY clause to filter group results. -
ANSWER-HAVING (Clause)
A _____ is a SELECT statement that combines dat...
WGU D426 OBJECTIVE ASSESMENT WITH
QUESTIONS AND WELL VERIFIED ANSWERS ||
GUARANTEED PASS || BEST VERSION || LATEST
EXAM
The HAVING clause is used with the GROUP BY clause to filter group results. -
ANSWER-HAVING (Clause)
A _____ is a SELECT statement that combines data from two tables, known as the
left table and right table, into a single result. The tables are combined by
comparing columns from the left and right tables, usually with the = operator. -
ANSWER-JOIN
A __________ is a rule that governs allowable values in a database based on
relational and business rules. - ANSWER-Constraint
The _______ constraint ensures that values in a column, or group of columns, are
NEVER REPEATED. - ANSWER-UNIQUE (Constraint)
The _______ constraint specifies an expression on one or more columns of a table.
- ANSWER-CHECK (Constraint)
,Constraints are added and dropped with the ALTER TABLE Table Name followed
by an ADD, DROP, or CHANGE clause. - ANSWER-Adding and Dropping
Constraints
The ________ operator provides an alternative way to determine if a value is
between two other values. - ANSWER-BETWEEN (Operator)
The _____ operator, when used in a WHERE clause, matches text against a pattern
using the two wildcard characters % and _. - ANSWER-LIKE (Operator)
The _____ ___ clause orders selected rows by one or more columns in ascending
(alphabetic or increasing) order. The DESC keyword with the ORDER BY clause
orders rows in descending order. - ANSWER-ORDER BY (Clause)
A column name can be replaced with an alias. The alias follows the column name,
separated by an optional AS keyword. - ANSWER-AS (Alias)
The ______ keyword combines the two results into one table. - ANSWER-UNION
(Keyword)
An ___________ compares columns of two tables with the = operator. This is the
most common type of join. - ANSWER-EQUIJOIN
A non-equijoin compares columns with an operator other than =, such as < and >. -
ANSWER-NON-EQUIJOIN
A __________ combines two tables without comparing columns without an ON
clause. This is the only JOIN that does not require a condition. - ANSWER-
CROSS-JOIN
, A ___________ joins a table to itself. - ANSWER-SELF-JOIN
Sometimes called a nested query or inner query, is a query within another SQL
query. - ANSWER-Subquery
In some databases, view data can be stored. A ________________ ______ is a
view for which data is stored at all times. Whenever a base table changes, the
corresponding view tables can also change, so this view must be refreshed. -
ANSWER-Materialized View
When ______ ______ __________ is specified, the database rejects inserts and
updates that do not satisfy the view query WHERE clause. - ANSWER-WITH
CHECK OPTION
An _____________ entity is documented in the data model, but not tracked with
data in the database. In an ER diagram, intangible entities are distinguished with
special notation, such as a dashed rectangle or distinct color. - ANSWER-
Intangible Entity
Weak Entities - ANSWER-Dependent Entities
A group of related entities. - ANSWER-Subject Area
Commonly used for software development. Software data structures are similar to
database structures - ANSWER-Unified Modeling Language (UML)
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