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WGU C170 : Quiz 4 - Advanced SQL – Questions with Verified Answers
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_____ functions extract a value of a given data type and convert it to the equivalent value in another data type. Ans-Conversion _____ is a relational set operator. Ans-MINUS _____ is a string function that returns the number of characters in a string value. Ans-LENGTH "Union compatible" m...

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  • February 28, 2025
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WGU C170 : Quiz 4 - Advanced SQL – Questions
with Verified Answers
_____ functions extract a value of a given data type and convert it to the
equivalent value in another data type. Ans✓✓✓-Conversion


_____ is a relational set operator. Ans✓✓✓-MINUS


_____ is a string function that returns the number of characters in a string value.
Ans✓✓✓-LENGTH


"Union compatible" means that the _____. Ans✓✓✓-names of the relation
attributes can be different, but the data types must be alike


A _____ is a query inside a query. Ans✓✓✓-subquery


A _____ join returns rows with matching values and includes all rows from both
tables (T1 and T2) with unmatched values. Ans✓✓✓-full outer


A(n) _____ join returns not only the rows matching the join condition (that is
rows, with matching values in the commun columns) but also the rows with
unmatched values. Ans✓✓✓-outer


A(n) _____ join will select only the rows with matching values in the common
attribute(s). Ans✓✓✓-natural

, A(n) _____ query can be used to produce a relation that retains the duplicate
rows. Ans✓✓✓-UNION ALL


A(n) _____ routine pools multiple transactions into a single batch to update a
master table field in a single operation. Ans✓✓✓-batch update


A(n) _____ subquery is a subquery that executes once for each row in the outer
query. Ans✓✓✓-correlated


A(n) _____ view is a view that can be used to update attributes in the base tables
that are used in the view. Ans✓✓✓-updatable


All join conditions are connected through a(n) _____ logical operator. Ans✓✓✓-
AND


An alternate syntax for a join is: SELECT column-list FROM table1 JOIN table2
_____ (common-column). Ans✓✓✓-USING


Assume you are using the INTERSECT operator to combine the results from two
tables with identical structure, CUSTOMER and CUSTOMER_2. The CUSTOMER
table contains 10 rows, while the CUSTOMER_2 table contains 7 rows. Customers
Duanne and Olowski are included in the CUSTOMER table as well as in the
CUSTOMER_2 table. How many records are returned when using the INTERSECT
operator? Ans✓✓✓-2


Assume you are using the MINUS operator to combine the results from two tables
with identical structure, CUSTOMER and CUSTOMER_2. The CUSTOMER table
contains 10 rows, while the CUSTOMER_2 table contains 7 rows. Customers
Dunne and Olowski are included in the CUSTOMER table as well as the

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