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CHAPTER 8: ADVANCED SQL

Beschreibung

CIS 3365 Quiz am CHAPTER 8: ADVANCED SQL, erstellt von Miguel Lucero am 05/04/2017.
Miguel Lucero
Quiz von Miguel Lucero, aktualisiert more than 1 year ago
Miguel Lucero
Erstellt von Miguel Lucero vor mehr als 7 Jahre
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Zusammenfassung der Ressource

Frage 1

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1. A relational join operation merges rows from two tables.
Antworten
  • True
  • False

Frage 2

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2. An inequality condition is also known as a natural join and an equality condition is also called a theta join.
Antworten
  • True
  • False

Frage 3

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3. Subqueries cannot be used in combinations with joins.
Antworten
  • True
  • False

Frage 4

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4. The SELECT statement uses the attribute list to indicate what columns to project in the resulting set.
Antworten
  • True
  • False

Frage 5

Frage
5. Numeric functions take one numeric parameter and return one value.
Antworten
  • True
  • False

Frage 6

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6. String manipulation functions are rarely used in programming.
Antworten
  • True
  • False

Frage 7

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7. UNION, INTERSECT, and MINUS work properly only if relations are intersect-compatible, which means that the names of the relation attributes and their data types must be different.
Antworten
  • True
  • False

Frage 8

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8. A view is a virtual table based on a SELECT query.
Antworten
  • True
  • False

Frage 9

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9. A sequence is not associated with a table and can be dropped from a database with a DROP SEQUENCE command.
Antworten
  • True
  • False

Frage 10

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10. SQL supports the conditional execution of procedures (IF-THEN-ELSE statements) that are typically supported by a programming language.
Antworten
  • True
  • False

Frage 11

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11. To remedy the lack of procedural functionality in SQL, and to provide some standardization within the many vendor offerings, the SQL-99 standard defined the use of persistent stored modules.
Antworten
  • True
  • False

Frage 12

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12. A persistent stored module is stored and executed on the database client machine.
Antworten
  • True
  • False

Frage 13

Frage
13. Every PL/SQL block must be given a name.
Antworten
  • True
  • False

Frage 14

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14. In Oracle, you can use the SQL*Plus command SHOW ERRORS to help you diagnose errors found in PL/SQL blocks.
Antworten
  • True
  • False

Frage 15

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15. PL/SQL blocks have a section used to declare variables.
Antworten
  • True
  • False

Frage 16

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16. The most useful feature of PL/SQL blocks is that they let a designer create code that can be named, stored, and executed by the DBMS.
Antworten
  • True
  • False

Frage 17

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17. Automating business procedures and automatically maintaining data integrity and consistency are trivial in a modern business environment.
Antworten
  • True
  • False

Frage 18

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18. A trigger is procedural SQL code that is automatically invoked by the RDBMS upon the occurrence of a given data manipulation event.
Antworten
  • True
  • False

Frage 19

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19. Triggers can only be used to update table values.
Antworten
  • True
  • False

Frage 20

Frage
20. A statement-level trigger is assumed if a designer omits the FOR EACH ROW keywords.
Antworten
  • True
  • False

Frage 21

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21. A row-level trigger is assumed if we omit the FOR EACH ROW keywords and a statement-level trigger required the use of the FOR EACH ROW keyword.
Antworten
  • True
  • False

Frage 22

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22. MySQL allows multiple triggering conditions per trigger.
Antworten
  • True
  • False

Frage 23

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23. BEFORE means before the changes are made in memory but after the changes are permanently saved to disk.
Antworten
  • True
  • False

Frage 24

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24. Just like database triggers, stored procedures are stored in the database.
Antworten
  • True
  • False

Frage 25

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25. One of the major advantages of stored procedures is that they can be used to encapsulate and represent business transactions.
Antworten
  • True
  • False

Frage 26

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26. Stored procedures must have at least one argument.
Antworten
  • True
  • False

Frage 27

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27. Variables can be declared inside a stored procedure.
Antworten
  • True
  • False

Frage 28

Frage
28. Cursors are held in a reserved memory area in the client computer.
Antworten
  • True
  • False

Frage 29

Frage
29. An implicit cursor is automatically created in procedural SQL when the SQL statement returns only one
Antworten
  • True
  • False

Frage 30

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30. An explicit cursor must return two or more rows.
Antworten
  • True
  • False

Frage 31

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31. A stored function is another name for a stored procedure.
Antworten
  • True
  • False

Frage 32

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Linked SQL” is a term used to refer to SQL statements that are contained within an application programming language such as COBOL, C++, ASP, Java, or ColdFusion.
Antworten
  • True
  • False

Frage 33

Frage
33. The following SQL statement uses a(n) . SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE = VENDOR.V_CODE;
Antworten
  • a. set operator
  • b. natural join
  • c. “old­style” join
  • d. procedural statement

Frage 34

Frage
34. When using a(n) join, only rows that meet the given criteria are returned.
Antworten
  • a. full
  • b. inner
  • c. outer
  • d. set

Frage 35

Frage
35. The statement SELECT * FROM T1, T2 produces a(n) join.
Antworten
  • a. cross
  • b. natural
  • c. equi-
  • d. full

Frage 36

Frage
36. How many rows would be returned from a cross join of tables A and B, if A contains 8 rows and B contains 18?
Antworten
  • a. 8
  • b. 18
  • c. 26
  • d. 144

Frage 37

Frage
37. A(n) join will select only the rows with matching values in the common attribute(s).
Antworten
  • a. natural
  • b. cross
  • c. full
  • d. outer

Frage 38

Frage
38. If a designer wishes to create an inner join, but the two tables do not have a commonly named attribute, he can use a(n) _____ clause.
Antworten
  • a. OF
  • b. USING
  • c. HAS
  • d. JOIN ON

Frage 39

Frage
39. A(n) join returns not only the rows matching the join condition (that is, rows with matching values in the common columns) but also the rows with unmatched values.
Antworten
  • a. outer
  • b. inner
  • c. equi-
  • d. cross

Frage 40

Frage
40. The syntax for a left outer join is .
Antworten
  • a. SELECT column-list FROM table1 OUTER JOIN table2 LEFT WHERE join-condition
  • b. SELECT column-list FROM table1 LEFT [OUTER] JOIN table2 ON join-condition
  • SELECT column-list WHERE LEFT table1 = table 2
  • . SELECT column-list FROM table1 LEFT table2 [JOIN] WHERE join-condition

Frage 41

Frage
41. In subquery terminology, the first query in the SQL statement is known as the query.
Antworten
  • a. outer
  • b. left
  • c. inner
  • d. base

Frage 42

Frage
42. In the context of SELECT subquery types, a is returned when an UPDATE subquery is used.
Antworten
  • a. NULL
  • b. single value
  • c. list of values
  • d. virtual table

Frage 43

Frage
43. Which of the following is a feature of a correlated subquery?
Antworten
  • a. The inner subquery executes first.
  • b. The outer subquery initiates the process of execution in a subquery.
  • c. The inner subquery initiates the process of execution in a subquery.
  • d. The outer subquery executes independent of the inner subquery

Frage 44

Frage
44. The function returns the current system date in MS Access.
Antworten
  • a. TO_DATE()
  • b. SYSDATE()
  • c. DATE()
  • d. TODAY()

Frage 45

Frage
45. When using the Oracle TO_DATE function, the code represents a three-letter month name.
Antworten
  • a. MON
  • b. MM3
  • c. MONTH
  • d. MM

Frage 46

Frage
46. In Oracle, the function converts a date to a character string.
Antworten
  • a. CONVERT()
  • b. TO_DATE
  • c. TO_CHAR()
  • d. TO_STRING()

Frage 47

Frage
is a string function that returns the number of characters in a string value.
Antworten
  • a. LENGTH
  • b. SUBSTRING
  • c. CONCAT
  • d. UCASE

Frage 48

Frage
48. When using the Oracle TO_NUMBER function to convert a character string into a number, represents a digit.
Antworten
  • a. 0
  • b. 9
  • c. $
  • d. #

Frage 49

Frage
49. The Oracle function compares an attribute or expression with a series of values and returns an associated value or a default value if no match is found.
Antworten
  • a. NVL
  • b. TO_CHAR
  • c. DECODE
  • d. CONVERT

Frage 50

Frage
50. is a relational set operator.
Antworten
  • a. MINUS
  • b. PLUS
  • c. ALL
  • d. EXISTS

Frage 51

Frage
51. “Union­compatible” means that the .
Antworten
  • a. names of the relation attributes can be different, but the data types must be alike
  • b. names of the relation attributes must be the same, but the data types can be different
  • c. names of the relation attributes must be the same and their data types must be alike
  • d. number of attributes must be the same, but the names and data types can be different

Frage 52

Frage
52. The data type is considered compatible with VARCHAR(35).
Antworten
  • a. DATE
  • b. INT
  • c. TINYINT
  • d. CHAR(15)

Frage 53

Frage
53. The statement combines rows from two queries and excludes duplicates.
Antworten
  • a. UNION
  • b. UNION ALL
  • c. INTERSECT
  • d. MINUS

Frage 54

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54. Assume a designer is using the UNION 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 Jenna and Howard are included in the CUSTOMER table as well as in the CUSTOMER_2 table. How many records are returned when using the UNION operator?
Antworten
  • a. 7
  • b. 10
  • c. 15
  • d. 17

Frage 55

Frage
55. Assume you are using the UNION ALL 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 in the CUSTOMER_2 table. How many records are returned when using the UNION ALL operator?
Antworten
  • a. 7
  • b. 10
  • c. 15
  • d. 17

Frage 56

Frage
56. 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 Dunne 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?
Antworten
  • a. 0
  • b. 2
  • c. 7
  • d. 10

Frage 57

Frage
57. The statement in SQL combines rows from two queries and returns only the rows that appear in the first set but not in the second.
Antworten
  • a. UNION
  • b. UNION ALL
  • c. INTERSECT
  • d. MINUS

Frage 58

Frage
58. 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 in the CUSTOMER_2 table. How many records are returned when using the MINUS operator?
Antworten
  • a. 0
  • b. 2
  • c. 8
  • d. 10

Frage 59

Frage
59. The operator could be used in place of INTERSECT if the DBMS does not support it.
Antworten
  • a. IN
  • b. OF
  • c. AND
  • d. UNION

Frage 60

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60. The operator could be used in place of MINUS if the DBMS does not support it.
Antworten
  • a. IN
  • b. NOT IN
  • c. AND
  • d. UNION

Frage 61

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61. The Oracle equivalent to an MS Access AutoNumber is a(n) .
Antworten
  • a. auto-number
  • b. sequence
  • c. TO_NUMBER function
  • d. trigger

Frage 62

Frage
62. Which of the following is a feature of oracle sequences?
Antworten
  • a. Oracle sequences are tied to columns and tables.
  • b. Oracle sequences generate a character string that can be assigned to tables.
  • c. An oracle sequence uses the identity column property to automatically number rows.
  • d. An oracle sequence can be created and deleted anytime.

Frage 63

Frage
63. The pseudo-column is used to select the next value from a sequence.
Antworten
  • a. CURRVAL
  • b. NEXTVAL
  • c. NEXT
  • d. GET_NEXT

Frage 64

Frage
64. In Oracle, make(s) it possible to merge SQL and traditional programming constructs, such as variables, conditional processing (IF-THEN-ELSE), basic loops (FOR and WHILE loops,) and error trapping.
Antworten
  • a. cursor-style processing
  • b. stored procedures
  • c. embedded SQL
  • d. Procedural Language SQL

Frage 65

Frage
65. The Oracle string concatenation function is .
Antworten
  • a. CONCAT
  • b. +
  • c. ||
  • d. &&

Frage 66

Frage
66. The PL/SQL block starts with the section.
Antworten
  • a. IS
  • b. OPEN
  • c. DECLARE
  • d. BEGIN

Frage 67

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67. Oracle recommends for creating audit logs.
Antworten
  • a. triggers
  • b. stored procedures
  • c. stored functions
  • d. tables

Frage 68

Frage
68. is a cursor attribute that returns TRUE if the last FETCH returned a row, and FALSE if not.
Antworten
  • a. %ROWCOUNT
  • b. %NOTFOUND
  • c. %FOUND
  • d. %ISOPEN
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