Chapter 6 - Questionnaire with answers PDF

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Modern Database Management, 13e (Hoffer) Chapter 6 Advanced SQL The ________ operator is used to combine the output from multiple queries into a single result table. A) INTERSECT B) DIVIDE C) COLLATE D) UNION Answer: D LO: 6: Write single- and multiple-table queries using SQL commands. Difficulty: M...

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Modern Database Management, 13e (Hoffer) Chapter 6 Advanced SQL 1) The ________ operator is used to combine the output from multiple queries into a single result table. A) INTERSECT B) DIVIDE C) COLLATE D) UNION Answer: D LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 2) A ________ is a temporary table used in the FROM clause of an SQL query. A) correlated subquery B) derived table C) view table D) trigger Answer: B LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 3) In order for two queries to be UNION-compatible, they must: A) both have the same number of lines in their SQL statements. B) both output compatible data types for each column and return the same number of rows. C) both return at least one row. D) both return exactly one row. Answer: B LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 4) The UNION clause is used to: A) combine the output from multiple queries into a single result table. B) join two tables together to form one table. C) find all rows that do not match in two tables. D) find all rows that are in one table, but not the other. Answer: A LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 1 Copyright © 2019 Pearson Education, Inc.

5) Establishing IF-THEN-ELSE logical processing within an SQL statement can be accomplished by: A) using the if-then-else construct. B) using the immediate if statement. C) using the CASE key word in a statement. D) using a subquery. Answer: C LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 6) All of the following are guidelines for better query design EXCEPT: A) understand how indexes are used in query processing. B) use a lot of self-joins. C) write simple queries. D) retrieve only the data that you need. Answer: B LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Difficult Classification: Concept AACSB: Information Technology 7) A join operation: A) brings together data from two different fields. B) causes two tables with a common domain to be combined into a single table or view. C) causes two disparate tables to be combined into a single table or view. D) is used to combine indexing operations. Answer: B LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 8) A join in which the joining condition is based on equality between values in the common columns is called a(n): A) equi-join. B) unilateral join. C) natural join. D) both A and C. Answer: D LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology

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9) The following code is an example of a(n): SELECT Customer_T.CustomerID, Order_T.CustomerID, CustomerName, OrderID FROM Customer_T, Order_T WHERE Customer_T.CustomerID = Order_T. CustomerID; A) equi-join. B) subquery. C) Full Outer JOIN. D) Right Outer JOIN. Answer: A LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Application AACSB: Information Technology 10) The following code would include: SELECT Customer_T.CustomerID,CustomerName, OrderID FROM Customer_T RIGHT OUTER JOIN Order_T ON Customer_T.CustomerID = Order_T.CustomerID; A) all rows of the Order_T Table regardless of matches with the Customer_T Table. B) all rows of the Customer_T Table regardless of matches with the Order_T Table. C) only rows that match both Customer_T and Order_T Tables. D) only rows that don't match both Customer_T and Order_T Tables. Answer: A LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Application AACSB: Information Technology

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11) The following code would include: SELECT Customer_T.CustomerID,CustomerName, OrderID FROM Customer_T LEFT OUTER JOIN Order_T ON Customer_T.CustomerID = Order_T.CustomerID; A) all rows of the Order_T Table regardless of matches with the Customer_T Table. B) all rows of the Customer_T Table regardless of matches with the Order_T Table. C) only rows that match both Customer_T and Order_T Tables. D) only rows that don't match both Customer_T and Order_T Tables. Answer: B LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Application AACSB: Information Technology 12) The following code would include: SELECT Customer_T.CustomerID, Order_T.CustomerID, CustomerName, OrderID FROM Customer_T, Order_T WHERE Customer_T.CustomerID = Order_T. CustomerID; A) all rows of the Order_T Table regardless of matches with the Customer_T Table. B) all rows of the Customer_T Table regardless of matches with the Order_T Table. C) only rows that match both Customer_T and Order_T Tables. D) only rows that don't match both Customer_T and Order_T Tables. Answer: C LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Application AACSB: Information Technology 13) A join that is based upon equality between values in two common columns with the same name and where one duplicate column has been removed is called a(n): A) equi-join. B) natural join. C) multivariate join. D) inner join. Answer: B LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology

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14) The most commonly used form of join operation is the: A) outer join. B) union join. C) equi-join. D) natural join. Answer: D LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 15) A join in which rows that do not have matching values in common columns are still included in the result table is called a(n): A) natural join. B) equi-join. C) outer join. D) union join. Answer: C LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 16) The outer join syntax does not apply easily to a join condition of more than ________ tables. A) two B) three C) four D) five Answer: A LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 17) In which of the following situations would one have to use an outer join in order to obtain the desired results? A) A report is desired that lists all customers who placed an order. B) A report is desired that lists all customers and the total of their orders. C) A report is desired that lists all customers and the total of their orders during the most recent month, and includes customers who did not place an order during the month (their total will be zero). D) There is never a situation that requires only an outer join. Answer: C LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Difficult Classification: Concept AACSB: Information Technology 5 Copyright © 2019 Pearson Education, Inc.

18) One major advantage of the outer join is that: A) information is easily accessible. B) information is not lost. C) the query is easier to write. D) information's data type changes. Answer: B LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 19) An operation to join a table to itself is called a(n): A) sufficient-join. B) inner join. C) outer join. D) self-join. Answer: D LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 20) A type of join between three tables is called a(n): A) ternary join. B) self-join. C) unnatural join. D) pinned join. Answer: A LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 21) A type of query that is placed within a WHERE or HAVING clause of another query is called a: A) master query. B) subquery. C) superquery. D) multi-query. Answer: B LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Easy Classification: Concept AACSB: Information Technology

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22) SQL provides the ________ technique, which involves placing an inner query within the WHERE or HAVING clause of an outer query. A) grouping B) joining C) subquery D) union Answer: C LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Moderate Classification: Concept AACSB: Information Technology 23) ________ takes a value of TRUE if a subquery returns an intermediate results table which contains one or more rows. A) IN B) HAVING C) EXISTS D) EXTENTS Answer: C LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Moderate Classification: Concept AACSB: Information Technology 24) EXISTS will take a value of ________ if the subquery returns an intermediate results table which contains one or more rows. A) false B) 1 C) true D) undefined Answer: C LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Moderate Classification: Concept AACSB: Information Technology 25) In SQL, a(n) ________ subquery is a type of subquery in which processing the inner query depends on data from the outer query. A) correlated B) paired C) natural D) inner Answer: A LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Moderate Classification: Concept AACSB: Information Technology 7 Copyright © 2019 Pearson Education, Inc.

26) ________ use the result of the inner query to determine the processing of the outer query. A) Correlated subqueries B) Outer subqueries C) Inner subqueries D) Subqueries Answer: D LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Moderate Classification: Concept AACSB: Information Technology 27) The following code is an example of a: SELECT CustomerName, CustomerAddress, CustomerCity, CustomerState, CustomerPostalCode FROM Customer_T WHERE Customer_T.CustomerID = (SELECT Order_T.CustomerID FROM Order_T WHERE OrderID = 1008); A) correlated subquery. B) subquery. C) join. D) FULL OUTER JOIN. Answer: B LO: 6.4: Write noncorrelated and correlated subqueries and know when to write each. Difficulty: Moderate Classification: Concept AACSB: Information Technology 28) A materialized view is/are: A) a virtual table created dynamically on request by a user. B) an in-line query. C) copies or replica of data based on queries. D) always an exact copy of the source table. Answer: C LO: 6.5: Write queries to create dynamic and materialized views. Difficulty: Easy Classification: Concept AACSB: Information Technology

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29) When a user creates a virtual table it is called a(n): A) materialized view. B) virtual table. C) inline view. D) dynamic view. Answer: D LO: 6.5: Write queries to create dynamic and materialized views. Difficulty: Moderate Classification: Concept AACSB: Information Technology 30) What would the following view contain for values? Create view CustomerOrders as Select CustID, Count(*) as TotOrders, Sum(ordertotal) as Value From customer inner join sale on customer.customer_id = sale.customer_id; A) A listing of all customers in the customer table B) A listing of the customer ID as well as the total number of orders and the total amount spent by the customer C) A listing of the customer ID as well as the total orders D) An error message Answer: B LO: 6.5: Write queries to create dynamic and materialized views. Difficulty: Easy Classification: Concept AACSB: Information Technology 31) A named set of SQL statements that are considered when a data modification occurs are called: A) stored procedures. B) treatments. C) triggers. D) trapdoors. Answer: C LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Easy Classification: Concept AACSB: Information Technology

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32) All of the following are part of the coding structure for triggers EXCEPT: A) event. B) condition. C) selection. D) action. Answer: C LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Easy Classification: Concept AACSB: Information Technology 33) While triggers run automatically, ________ do not and have to be called. A) trapdoors B) routines C) selects D) updates Answer: B LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Moderate Classification: Concept AACSB: Information Technology 34) SQL-invoked routines can be: A) part of a DDL statement. B) functions or procedures. C) part of a DCL statement. D) contained within a CREATE statement. Answer: B LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Easy Classification: Concept AACSB: Information Technology 35) All of the following are advantages of SQL-invoked routines EXCEPT: A) flexibility. B) efficiency. C) sharability. D) security. Answer: D LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Easy Classification: Concept AACSB: Information Technology

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36) A procedure is: A) stored outside the database. B) given a reserved SQL name. C) called by name. D) unable to be modified. Answer: C LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Easy Classification: Concept AACSB: Information Technology 37) User-defined data types: A) are not allowed in any DBMS. B) are only allowed in Oracle. C) can have defined functions and methods. D) can be used once in a system. Answer: C LO: 6.7: Discuss the SQL:2011 and SQL:2016 standards and explain SQL enhancements and extensions Difficulty: Moderate Classification: Concept AACSB: Information Technology 38) A new set of analytical functions added in SQL:2008 is referred to as: A) OLAF functions. B) MOLAP functions. C) average functions. D) OLAP functions. Answer: D LO: 6.7: Discuss the SQL:2011 and SQL:2016 standards and explain SQL enhancements and extensions Difficulty: Moderate Classification: Concept AACSB: Information Technology 39) The MERGE command: A) allows one to combine the INSERT and UPDATE operations. B) allows one to combine the INSERT and DELETE operations. C) joins 2 tables together. D) is always a single table operation. Answer: A LO: 6.7: Discuss the SQL:2011 and SQL:2016 standards and explain SQL enhancements and extensions Difficulty: Moderate Classification: Concept AACSB: Information Technology 11 Copyright © 2019 Pearson Education, Inc.

40) The ________ DBA view shows information about all users of the database in Oracle. A) DBA_USERS B) USERS C) DBA_VIEWS D) DBA_INDEXES Answer: A LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Easy Classification: Concept AACSB: Information Technology 41) If the DBA wishes to describe all tables in the database, which data dictionary view should be accessed in Oracle? A) DBA_TAB_PRIVS B) DBA_TAB_COMMENTS C) DBA_TABLE_LABEL D) DBA_TABLES Answer: D LO: 6.6: Understand common uses of database triggers and stored procedures. Difficulty: Moderate Classification: Concept AACSB: Information Technology 42) The following statement is an example of: CREATE TABLE Customer_t ( CustNmbr number(11,0), CreditLimit number(6,2), CustStart date, CustEnd date, PERIOD for Custperiod(CustStart,CustEnd)); A) a materialized view. B) an application time period table. C) a system-versioned table. D) a dynamic view. Answer: B LO: 6.7: Discuss the SQL:2011 and SQL:2016 standards and explain SQL enhancements and extensions Difficulty: Moderate Classification: Concept AACSB: Information Technology

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43) The UNION clause is used to combine the output from multiple queries into a single result table. Answer: TRUE LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 44) IF-THEN-ELSE logical processing cannot be accomplished within an SQL statement. Answer: FALSE LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 45) Figuring out what attributes you want in your query before you write the query will help with query writing. Answer: TRUE LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 46) It is better not to have a result set identified before writing GROUP BY and HAVING clauses for a query. Answer: FALSE LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 47) Specifying the attribute names in the SELECT statement will make it easier to find errors in queries and also correct for problems that may occur in the base system. Answer: FALSE LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 48) Combining a table with itself results in a faster query. Answer: FALSE LO: 6.2: Write single- and multiple-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology

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49) An equi-join is a join in which one of the duplicate columns is eliminated in the result table. Answer: FALSE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 50) A join in which the joining condition is based on equality between values in the common column is called an equi-join. Answer: TRUE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 51) The joining condition of an equi-join is based upon an equality. Answer: TRUE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 52) A natural join is the same as an equi-join, except that it is performed over matching columns that have been defined with the same name, and one of the duplicate columns is eliminated. Answer: TRUE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 53) The natural join is very rarely used. Answer: FALSE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 54) An SQL query that implements an outer join will return rows that do not have matching values in common columns. Answer: TRUE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: Easy Classification: Concept AACSB: Information Technology

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55) Using an outer join produces this information: rows that do not have matching values in common columns are not included in the result table. Answer: FALSE LO: 6.3: Define three types of join commands and use SQL to write these commands. Difficulty: E...