Chapter 5 Introduction to SQL Multiple Choice

Modern Database Management Chapter 5 Introduction to SQL 1) The schema is the structure that contains descriptions of objects such as tables and views created by users. A) SQL B) schema C) catalog D) master view Answer: B 2) ________ is a set of commands used to control a database, including security. A) DML B) DDL C) DCL D) DPL Answer: C 3) ________ is a set of commands used to update and query a database. A) DML data manipulation language B) DDL Data Definition Language C) DCL data control language D) DPL Answer: A 4) DDL is typically used during which phase of the development process? A) Implementation B) Physical design C) Analysis D) Evaluation Answer: B 5) The main concept of relational databases was published in 1970 by: A) Itzak Ben-Gan. B) Hoffer. C) Mills. D) E.F.Codd. Answer: D 6) Relational databases are heavily based on the mathematical concept of: A) set theory. B) bet theory. C) get theory. D) met theory. Answer: A 1 7) The command for creating a database is: A) CREATE TABLE. B) CREATE VIEW. C) CREATE SCHEMA. D) CREATE AUTHORIZATION. Answer: C 8) The command for removing a table is: A) CREATE TABLE. B) REMOVE TABLE. C) DROP TABLE. D) TRUNCATE TABLE. Answer: C 9) Any create command may be reversed by using a(n) ________ command. A) undo B) drop C) delete D) unpack Answer: B 10) The first in a series of steps to follow when creating a table is to: A) identify columns that must be unique. B) identify each attribute and its characteristics. C) create an index. D) identify columns that must be null. Answer: B 11) The SQL command ________ adds one or more new columns to a table. A) CREATE TABLE B) ALTER TABLE C) CREATE VIEW D) CREATE RELATIONSHIP Answer: B 12) What does the following SQL statement do? ALTER TABLE Customer_T ADD (Type Varchar (2)); A) Alters the Customer_T table to accept Type 2 Varchars B) Alters the Customer_T table to be a Type 2 Varchar C) Alters the Customer_T table by adding a field called "Type" D) Alters the Customer_T table by adding a 2-byte field called "Varchar" Answer: C 2 13) INSERT INTO is an example of ________ code. A) DDL B) DML C) DCL D) TIO Answer: B 14) What does the following SQL command do? INSERT INTO Customer_T values (001,'John Smith','231 West St','Boston','MA','02115'); A) Adds a new record to the Customer_T table B) Creates the Customer_T table C) Deletes the Customer_T table D) Updates the Customer_T table Answer: A 15) Given a table named store with 5 fields: store_id, address, city, state, zipcode, why would the following insert command not work? INSERT INTO store values ('234 Park Street') A) It would work just fine. B) You must specify the fields to insert if you are only inserting some of the fields. C) There is no table keyword. D) INSERT INTO should be INSERT to. Answer: B 16) What does the following SQL statement do? DELETE FROM Customer_T WHERE state = 'HI'; A) Deletes all records from Customer_t where the state is equal to HI B) Removes the Customer_T table from the database C) Deletes all records from the Customer_T table D) Doesn't delete anything because of a syntax error Answer: A 17) What does the following SQL statement do? UPDATE Product_T SET Unit_Price = 775 WHERE Product_ID = 7 A) Changes the price of a unit called Product_T to 7 B) Changes the unit price of Product 7 to 775 3 C) Changes the length of the Unit_Price field to 775 D) Updates the Product_T table to have a unit price of 775 Answer: B 18) Which of the following is a technique for optimizing the internal performance of the relational data model? A) Avoiding indexes on secondary keys B) Clustering data C) Not reporting statistics to save machine resources D) Using random index organizations Answer: B 19) Indexes are created in most RDBMSs to: A) provide a quicker way to store data. B) decrease the amount of disk space utilized. C) provide rapid random and sequential access to base-table data. D) increase the cost of implementation. Answer: C 20) In an SQL statement, which of the following parts states the conditions for row selection? A) SELECT B) FROM C) WHERE D) GROUP BY Answer: C 21) The first part of an SQL query to be read is the ________ statement. A) SELECT B) FROM C) WHERE D) ORDER BY Answer: B 22) The last part of an SQL query to be read is the ________ statement. A) SELECT B) FROM C) WHERE D) ORDER BY Answer: D 4 23) What does the following SQL statement do? SELECT * From Customer WHERE Cust_Type = "Best" A) Selects all the fields from the Customer table for each row with a customer labeled "Best" B) Selects the "*" field from the Customer table for each row with a customer labeled "Best" C) Selects fields with a "*" in them from the Customer table D) Selects all the fields from the Customer table for each row with a customer labeled "*" Answer: A 24) What result will the following SQL statement produce? SELECT Avg(Standard_Price) as average from Product_V; A) The average of all products in Product_V B) The average Standard_Price of all products in Product_V C) The average price of all products D) The mode of all prices Answer: B 25) Which of the following questions is answered by the SQL statement? SELECT COUNT (Product_Description) FROM Product_T; A) How many products are in the table Product_T? B) How many products have product descriptions in the Product Table? C) How many characters are in the field name "Product_Description"? D) How many different columns named "Product_Description" are there in table Product_T? Answer: B 26) What results will be produced by the following SQL query? SELECT SUM(Standard_Price) as Total_Price from Product_V where Product_Type = 'WOOD'; A) The total price of all products that are of type wood B) The total price of all products C) The Standard_Price of the first wood product in the table D) The Standard_Price of any wood product in the table Answer: A 27) Which of the following counts ONLY rows that contain a value? A) COUNT B) COUNT(*) C) TALLY(*) 5 D) CHECKNUM Answer: A 28) Which of the following will produce the minimum of all standard prices? A) SELECT Standard_Price FROM Product_V WHERE Standard_Price = min; B) SELECT MIN(Standard_Price) FROM Product_V; C) SELECT Standard_Price FROM min(Product_V); D) SELECT MIN(Standard_Price) FROM Product_V WHERE Standard_Price = min(Standard_Price); Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 6 29) What will result from the following SQL Select statement? SELECT MIN(Product_Description) FROM Product_V; A) The minimum value of Product_Description will be displayed. B) An error message will be generated. C) The first product description alphabetically in Product_V will be shown. D) SELECT @ will be displayed. Answer: C LO: 5.4: Write single-table queries using SQL commands. Difficulty: Difficult Classification: Concept AACSB: Information Technology 30) Which of the following is the wildcard operator in SQL statements? A) < > B) * C) = D) & Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 31) What result set will the following query return? SELECT Item_No FROM Order_V WHERE quantity > 10; A) The Item_No of all orders that had more than 10 items B) The Order_Id of all orders that had more than one item C) The Order_Id of all orders that had more than 10 items D) The Item_No of all orders that had 10 or more items Answer: A LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 7 32) What result set will the following query return? SELECT Item_No, description FROM item WHERE weight > 100 and weight < 200; A) The Item_No and description for all items weighing less than 100 B) The Item_No for all items weighing between 101 and 199 C) The Item_No and description for all items weighing between 101 and 199 D) The Item_No for all items weighing more than 200 Answer: C LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 33) To eliminate duplicate rows in a query, the ________ qualifier is used in the SQL Select command. A) ALTER B) DISTINCT C) CHECK D) SPECIFIC Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 34) What result set is returned from the following query? SELECT Customer_Name, telephone FROM customers WHERE city in ('Boston','New York','Denver'); A) The Customer_Name and telephone of all customers B) The Customer_Name and telephone of all customers living in either Boston, New York or Denver C) The Customer_Name and telephone of all customers living in Boston and New York and Denver D) The Customer_Name of all customers living in Boston, New York or Denver Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 8 35) To get all the customers from Hawaii sorted together, which of the following would be used? A) ORDER BY B) GROUP BY C) HAVING D) SORT Answer: A LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 36) A single value returned from an SQL query that includes an aggregate function is called a(n): A) agate. B) scalar aggregate. C) vector aggregate. D) summation. Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 37) Multiple values returned from an SQL query that includes an aggregate function are called: A) vector aggregates. B) scalar aggregates. C) agates. D) summations. Answer: A LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 38) Which of the following can produce scalar and vector aggregates? A) ORDER BY B) GROUP BY C) HAVING D) SORT Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 9 39) What will be returned when the following SQL statement is executed? SELECT driver_no,count(*) as num_deliveries FROM deliveries GROUP BY driver_no; A) A listing of all drivers, sorted by driver number B) A listing of each driver as well as the number of deliveries that he or she has made C) A count of all of the deliveries made by all drivers D) An error message Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Application AACSB: Information Technology 40) What will be returned when the following SQL statement is executed? SELECT driver_no, count(*) as num_deliveries FROM deliveries WHERE state = 'MA' GROUP BY driver_no; A) A listing of all drivers who made deliveries to state = 'MA', sorted by driver number B) A listing of each driver who made deliveries to state = 'MA' as well as the number of deliveries that each driver has made to that state C) A count of all of the deliveries made to state = 'MA' by all drivers D) An error message will be generated Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Difficult Classification: Application AACSB: Information Technology 41) Which of the following finds all groups meeting stated conditions? A) SELECT B) WHERE C) HAVING D) FIND Answer: C LO: 5.4: Write single-table queries using SQL commands. Difficulty: Easy Classification: Concept AACSB: Information Technology 10 42) What will be returned when the following SQL query is executed? SELECT driver_no, COUNT(*) as num_deliveries FROM deliveries GROUP BY driver_no HAVING COUNT(*) > 2; A) A listing of all drivers who made more than 2 deliveries as well as a count of the number of deliveries B) A listing of all drivers C) A listing of the number of deliveries greater than 2 D) A listing of all drivers who made more than 2 deliveries Answer: A LO: 5.4: Write single-table queries using SQL commands. Difficulty: Difficult Classification: Concept AACSB: Information Technology 43) Which of the following is true of the order in which SQL statements are evaluated? A) The SELECT clause is always processed first. B) The SELECT clause is always processed last. C) The SELECT clause is processed before the ORDER BY clause. D) The GROUP BY clause is processed before the WHERE clause. Answer: C LO: 5.4: Write single-table queries using SQL commands. Difficulty: Difficult Classification: Concept AACSB: Information Technology 44) A view may not be updated directly if it contains: A) the SELECT clause. B) the HAVING clause. C) the FROM clause. D) the WHERE clause. Answer: B LO: 5.4: Write single-table queries using SQL commands. Difficulty: Moderate Classification: Concept AACSB: Information Technology 11 45) Requiring a CustomerID to exist in a Primary table before it can exist in a foreign table is an example of: A) referential referring. B) referential integrity. C) ethical integrity. D) the Hoffer Principle. Answer: B LO: 5.5: Establish referential integrity using SQL. Difficulty: Moderate Classification: Concept AACSB: Information Technology 46) Which of the following is a purpose of the SQL standard? A) To specify syntax and semantics of SQL data definition and manipulation languages B) To specify maximum and incomplete standards C) To define every operation for every SQL database D) To permit no degrees of freedom for SQL DBMS Answer: A LO: 5.6: Discuss the SQL:1999 and SQL:2016 standards. Difficulty: Easy Classification: Synthesis AACSB: Information Technology 47) The benefits of a standardized relational language include: A) application turnover. B) increased training costs. C) cross-system communication. D) confusing the SQL programmers. Answer: C LO: 5.6: Discuss the SQL:1999 and SQL:2016 standards. Difficulty: Easy Classification: Synthesis AACSB: Information Technology 12