Oracle Database Programming with SQL Section 10
1. A column in a table can be given a default value. This option prevents NULL values from automatically being assigned to the column if a row is inserted without a specified value for the column. True or False ?
♦True (*)
♦False
♦True (*)
♦False
2. In developing the Employees table, you create a column called hire_date. You assign the hire_date column a DATE datatype with a DEFAULT value of 0 (zero). A user can come back later and enter the correct hire_date. This is __________.
♦A great idea. When a new employee record is entered, if no hire_date is specified, the 0 (zero) will be automatically specified.
♦A great idea. When new employee records are entered, they can be added faster by allowing the 0’s (zeroes) to be automatically specified.
♦Both a and b are correct.
♦A bad idea. The default value must match the DATE datatype of the column. (*)
3. Aliases can be used with MERGE statements. True or False?
♦True (*)
♦False
♦True (*)
♦False
4. Multi-table inserts can be conditional or unconditional. True or False?
♦True (*)
♦False
♦True (*)
♦False
5. A multi-table insert statement can insert into more than one table. (True or False?)
♦True (*)
♦False
♦True (*)
♦False
6. Which of the following represents the correct syntax for an INSERT statement?
♦INSERT VALUES INTO customers (3178 J. Smith 123 Main Street Nashville TN 37777;
♦INSERT INTO customers VALUES ‘3178’ ‘J.’ ‘Smith’ ‘123 Main Street’ ‘Nashville’ ‘TN’ ‘37777’;
♦INSERT VALUES INTO customers (3178 J. Smith 123 Main Street Nashville TN 37777;
♦INSERT INTO customers VALUES ‘3178’ ‘J.’ ‘Smith’ ‘123 Main Street’ ‘Nashville’ ‘TN’ ‘37777’;
♦INSERT INTO customers VALUES (‘3178’, ‘J.’, ‘Smith’, ‘123 Main Street’, ‘Nashville’, ‘TN’, ‘37777’); (*)
♦INSERT customers VALUES 3178, J., Smith, 123 Main Street, Nashville, TN, 37777;
7. You need to delete a record in the EMPLOYEES table for Tim Jones, whose unique employee identification number is 348. The EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(5) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
ADDRESS VARCHAR2(30)
PHONE NUMBER(10)
EMPLOYEE_ID NUMBER(5) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
ADDRESS VARCHAR2(30)
PHONE NUMBER(10)
Which DELETE statement will delete the appropriate record without deleting any additional records?
♦DELETE FROM employees
WHERE employee_id = 348;
(*)
WHERE employee_id = 348;
(*)
♦DELETE FROM employees
WHERE last_name = jones;
WHERE last_name = jones;
♦DELETE ‘jones’
FROM employees;
FROM employees;
♦DELETE *
FROM employees
WHERE employee_id = 348;
FROM employees
WHERE employee_id = 348;
8. The EMPLOYEES table contains the following columns:
EMPLOYEE_ID NUMBER(10) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FAST_NAME VARCHAR2(20)
DEPARTMENT_ID VARCHAR2(20)
HIRE_DATE DATE
SALARY NUMBER(9,2)
BONUS NUMBER(9,2)
EMPLOYEE_ID NUMBER(10) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FAST_NAME VARCHAR2(20)
DEPARTMENT_ID VARCHAR2(20)
HIRE_DATE DATE
SALARY NUMBER(9,2)
BONUS NUMBER(9,2)
You want to execute one DML statement to change the salary of all employees in department 10 to equal the new salary of employee number 89898. Currently, all employees in department 10 have the same salary value. Which statement should you execute?
♦UPDATE employees
SET salary = (SELECT salary FROM employees WHERE employee_id = 89898)
WHERE department_id = 10;
(*)
SET salary = (SELECT salary FROM employees WHERE employee_id = 89898)
WHERE department_id = 10;
(*)
♦UPDATE employees
SET salary = (SELECT salary FROM employees WHERE employee_id = 89898);
SET salary = (SELECT salary FROM employees WHERE employee_id = 89898);
♦UPDATE employees
SET salary = SELECT salary FROM employees WHERE employee_id = 89898;
SET salary = SELECT salary FROM employees WHERE employee_id = 89898;
♦UPDATE employees
SET salary = (SELECT salary FROM employees WHERE employee_id = 89898 AND department_id = 10);
SET salary = (SELECT salary FROM employees WHERE employee_id = 89898 AND department_id = 10);
9. If the subquery returns one row, how many rows will be deleted from the employees table?
DELETE FROM employees
WHERE department_id =
(SELECT department_id
FROM departments
WHERE department_name LIKE ‘%Public%’);
DELETE FROM employees
WHERE department_id =
(SELECT department_id
FROM departments
WHERE department_name LIKE ‘%Public%’);
♦One row will be deleted, as the subquery only returns one row.
♦All rows in the employees table will be deleted, no matter the department_id.
♦All rows in the employees table of employees who work in the given department will be deleted. (*)
♦No rows will be deleted.
♦All rows in the employees table will be deleted, no matter the department_id.
♦All rows in the employees table of employees who work in the given department will be deleted. (*)
♦No rows will be deleted.
10. What keyword in an UPDATE statement speficies the column that you want to change?
♦SET (*)
♦SELECT
♦WHERE
♦HAVING
♦SET (*)
♦SELECT
♦WHERE
♦HAVING
11. To return a table summary on the customers table, which of the following is correct?
♦DEFINE customers, or DEF customers
♦SHOW customers, or SEE customers
♦DISTINCT customers, or DIST customers
♦DESCRIBE customers, or DESC customers (*)
♦DEFINE customers, or DEF customers
♦SHOW customers, or SEE customers
♦DISTINCT customers, or DIST customers
♦DESCRIBE customers, or DESC customers (*)
12. The PRODUCTS table contains these columns:
PRODUCT_ID NUMBER NOT NULL
PRODUCT_NAME VARCHAR2 (25)
SUPPLIER_ID NUMBER NOT NULL
LIST_PRICE NUMBER (7,2)
COST NUMBER (5,2)
QTY_IN_STOCK NUMBER(4)
LAST_ORDER_DT DATE DEFAULT SYSDATE NOT NUL
PRODUCT_ID NUMBER NOT NULL
PRODUCT_NAME VARCHAR2 (25)
SUPPLIER_ID NUMBER NOT NULL
LIST_PRICE NUMBER (7,2)
COST NUMBER (5,2)
QTY_IN_STOCK NUMBER(4)
LAST_ORDER_DT DATE DEFAULT SYSDATE NOT NUL
Which INSERT statement will execute successfully?
♦INSERT INTO products(product_id, product_name)
VALUES (2958, ‘Cable’);
VALUES (2958, ‘Cable’);
♦INSERT INTO products(product_id, product_name, supplier_id
VALUES (2958, ‘Cable’, 8690, SYSDATE);
VALUES (2958, ‘Cable’, 8690, SYSDATE);
♦INSERT INTO products (product_id, product_name, supplier_id, list_price, cost, qty_in_stock)
VALUES(2958, ‘Cable’, 8690, 7.09, 4.04, 700) (*)
VALUES(2958, ‘Cable’, 8690, 7.09, 4.04, 700) (*)
♦INSERT INTO products
VALUES (2958, ‘Cable’, 8690, 7.09, 4.04, SYSDATE);
VALUES (2958, ‘Cable’, 8690, 7.09, 4.04, SYSDATE);
13. Assume all the column names are correct. The following SQL statement will execute which of the following?
INSERT INTO departments
(department_id, department_name, manager_id, location_id)
VALUES (70, ‘Public Relations’, 100, 1700);
INSERT INTO departments
(department_id, department_name, manager_id, location_id)
VALUES (70, ‘Public Relations’, 100, 1700);
♦’Public Relations’ will be inserted into the manager_name column.
♦70 will be inserted into the department_id column. (*)
♦1700 will be inserted into the manager_id column.
♦100 will be inserted into the department_id column.
♦70 will be inserted into the department_id column. (*)
♦1700 will be inserted into the manager_id column.
♦100 will be inserted into the department_id column.
14. You need to copy rows from the EMPLOYEE table to the EMPLOYEE_HIST table. What could you use in the INSERT statement to accomplish this task?
♦A subquery (*)
♦A function
♦A SET clause
♦An ON clause
♦A subquery (*)
♦A function
♦A SET clause
♦An ON clause
15. The STUDENTS table contains these columns:
STU_ID NUMBER(9) NOT NULL
LAST_NAME VARCHAR2 (30) NOT NULL
FIRST_NAME VARCHAR2 (25) NOT NULL
DOB DATE
STU_TYPE_ID VARCHAR2(1) NOT NULL
ENROLL_DATE DATE
STU_ID NUMBER(9) NOT NULL
LAST_NAME VARCHAR2 (30) NOT NULL
FIRST_NAME VARCHAR2 (25) NOT NULL
DOB DATE
STU_TYPE_ID VARCHAR2(1) NOT NULL
ENROLL_DATE DATE
You create another table, named FT_STUDENTS, with an identical structure.You want to insert all full-time students who have a STU_TYPE_ID value of “F” into the new table. You execute this INSERT statement:
INSERT INTO ft_students
(SELECT stu_id, last_name, first_name, dob, stu_type_id, enroll_date
FROM students
WHERE UPPER(stu_type_id) = ‘F’);
(SELECT stu_id, last_name, first_name, dob, stu_type_id, enroll_date
FROM students
WHERE UPPER(stu_type_id) = ‘F’);
What is the result of executing this INSERT statement?
♦An error occurs because the INSERT statement does NOT contain a VALUES clause.
♦All full-time students are inserted into the FT_STUDENTS table. (*)
♦An error occurs because the FT_STUDENTS table already exists.
♦An error occurs because you CANNOT use a subquery in an INSERT statement.
♦All full-time students are inserted into the FT_STUDENTS table. (*)
♦An error occurs because the FT_STUDENTS table already exists.
♦An error occurs because you CANNOT use a subquery in an INSERT statement.
16. Which of the following statements will add a new customer to the customers table in the Global Fast Foods database?
♦INSERT INTO customers (id, first_name, last_name, address, city, state, zip, phone_number)
VALUES (145, ‘Katie’, ‘Hernandez’, ’92 Chico Way’, ‘Los Angeles’, ‘CA’, 98008, 8586667641);
(*)
VALUES (145, ‘Katie’, ‘Hernandez’, ’92 Chico Way’, ‘Los Angeles’, ‘CA’, 98008, 8586667641);
(*)
♦INSERT IN customers (id, first_name, last_name, address, city, state, zip, phone_number);
♦INSERT INTO customers
(id 145, first_name ‘Katie’, last_name ‘Hernandez’, address ’92 Chico Way’, city ‘Los Angeles’, state ‘CA’, zip 98008, phone_number 8586667641);
(id 145, first_name ‘Katie’, last_name ‘Hernandez’, address ’92 Chico Way’, city ‘Los Angeles’, state ‘CA’, zip 98008, phone_number 8586667641);
♦INSERT INTO customers (id, first_name, last_name, address, city, state, zip, phone_number)
VALUES (“145”, ‘Katie’, ‘Hernandez’, ’92 Chico Way’, ‘Los Angeles’, ‘CA’, “98008”, “8586667641”);
VALUES (“145”, ‘Katie’, ‘Hernandez’, ’92 Chico Way’, ‘Los Angeles’, ‘CA’, “98008”, “8586667641”);
17. Which statement about the VALUES clause of an INSERT statement is true?
♦To specify a null value in the VALUES clause, use an empty string (” “).
♦To specify a null value in the VALUES clause, use an empty string (” “).
♦Character, date, and numeric data must be enclosed within single quotes in the VALUES clause.
♦The VALUES clause in an INSERT statement is mandatory in a subquery.
♦The VALUES clause in an INSERT statement is mandatory in a subquery.
♦If no column list is specified, the values must be listed in the same order that the columns are listed in the table. (*)
18. If the employees table has 7 rows, how many rows are inserted into the copy_emps table with the following statement:
INSERT INTO copy_emps (employee_id, first_name, last_name, salary, department_id)
SELECT employee_id, first_name, last_name, salary, department_id
FROM employees♦No rows, as the SELECT statement is invalid.
♦10 rows will be created.
♦No rows, as you cannot use subqueries in an insert statement.
♦7 rows, as no WHERE-clause restricts the rows returned on the subquery. (*)
INSERT INTO copy_emps (employee_id, first_name, last_name, salary, department_id)
SELECT employee_id, first_name, last_name, salary, department_id
FROM employees♦No rows, as the SELECT statement is invalid.
♦10 rows will be created.
♦No rows, as you cannot use subqueries in an insert statement.
♦7 rows, as no WHERE-clause restricts the rows returned on the subquery. (*)
19. Using the INSERT statement and assuming that a column can accept null values, how can you implicitly insert a null value in a column?
♦It is not possible to implicitly insert a null value in a column.
♦Omit the column in the column list. (*)
♦Use the NULL keyword.
♦Use the ON clause
♦It is not possible to implicitly insert a null value in a column.
♦Omit the column in the column list. (*)
♦Use the NULL keyword.
♦Use the ON clause
20. Insert statements can be combined with subqueries to create more than one row per statement. True or False?
♦True (*)
♦False
♦True (*)
♦False
21. Which statement below will not insert a row of data into a table?
♦INSERT INTO student_table
VALUES (143354, ‘Roberts’, ‘Cameron’, 6543);
VALUES (143354, ‘Roberts’, ‘Cameron’, 6543);
♦INSERT INTO (id, lname, fname, lunch_num)
VALUES (143354, ‘Roberts’, ‘Cameron’, 6543);
(*)
VALUES (143354, ‘Roberts’, ‘Cameron’, 6543);
(*)
♦INSERT INTO student_table (id, lname, fname, lunch_num)
VALUES (143352, ‘Roberts’, ‘Cameron’, DEFAULT);
VALUES (143352, ‘Roberts’, ‘Cameron’, DEFAULT);
♦INSERT INTO student_table (id, lname, fname, lunch_num)
VALUES (143354, ‘Roberts’, ‘Cameron’, 6543);
VALUES (143354, ‘Roberts’, ‘Cameron’, 6543);
22. Aliases can be used with MERGE statements. True or False?
♦True (*)
♦False
♦True (*)
♦False
23. Multi-table inserts are used when the same source data should be inserted into _____________ target table.
♦A very large
♦A data warehouse
♦Ten
♦More than one (*)
♦A very large
♦A data warehouse
♦Ten
♦More than one (*)
24. The DEFAULT keyword can be used in the following statements:
♦INSERT and UPDATE (*)
♦INSERT and DELETE
♦DELETE and UPDATE
♦All of the above
♦INSERT and UPDATE (*)
♦INSERT and DELETE
♦DELETE and UPDATE
♦All of the above
25. The default value must match the __________ of the column.
♦Datatype (*)
♦Table
♦Column name
♦Size
♦Datatype (*)
♦Table
♦Column name
♦Size
26. One of the sales representatives, Janet Roper, has informed you that she was recently married, and she has requested that you update her name in the employee database. Her new last name is Cooper. Janet is the only person with the last name of Roper that is employed by the company. The EMPLOYEES table contains these columns and all data is stored in lowercase:
EMPLOYEE_ID NUMBER(10) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
DEPARTMENT_ID VARCHAR2 (20)
HIRE_DATE DATE
SALARY NUMBER(10)
EMPLOYEE_ID NUMBER(10) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
DEPARTMENT_ID VARCHAR2 (20)
HIRE_DATE DATE
SALARY NUMBER(10)
Which UPDATE statement will accomplish your objective?
♦UPDATE employees
SET cooper = ‘last_name’
WHERE last_name = ‘roper’;
SET cooper = ‘last_name’
WHERE last_name = ‘roper’;
♦UPDATE employees last_name = ‘cooper’
WHERE last_name = ‘roper’;
WHERE last_name = ‘roper’;
♦UPDATE employees
SET last_name = ‘cooper’
WHERE last_name = ‘roper’; (*)
SET last_name = ‘cooper’
WHERE last_name = ‘roper’; (*)
♦UPDATE employees
SET last_name = ‘roper’
WHERE last_name = ‘cooper’;
SET last_name = ‘roper’
WHERE last_name = ‘cooper’;
27. To change an existing row in a table, you can use the UPDATE or INSERT statements. True or False?
♦True
♦False (*)
♦True
♦False (*)
28. One of your employees was recently married. Her employee ID is still 189, however, her last name is now Rockefeller. Which SQL statement will allow you to reflect this change?
♦INSERT INTO my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189;
♦INSERT my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189;
♦UPDATE INTO my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189;
♦UPDATE my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189; (*)
♦INSERT INTO my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189;
♦INSERT my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189;
♦UPDATE INTO my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189;
♦UPDATE my_employees SET last_name = ‘Rockefeller’ WHERE employee_ID = 189; (*)
29. The TEACHERS and CLASS_ASSIGNMENTS tables contain these columns:
TEACHERS:
TEACHER_ID NUMBER(5)
NAME VARCHAR2(25)
SUBJECT_ID NUMBER(5)
HIRE_DATE DATE
SALARY NUMBER(9,2)
TEACHERS:
TEACHER_ID NUMBER(5)
NAME VARCHAR2(25)
SUBJECT_ID NUMBER(5)
HIRE_DATE DATE
SALARY NUMBER(9,2)
CLASS_ASSIGNMENTS:
CLASS_ID NUMBER(5)
TEACHER_ID NUMBER(5)
START_DATE DATE
MAX_CAPACITY NUMBER(3)
CLASS_ID NUMBER(5)
TEACHER_ID NUMBER(5)
START_DATE DATE
MAX_CAPACITY NUMBER(3)
Which scenario would require a subquery to return the desired results?
♦You need to display the start date for each class taught by a given teacher.
♦You need to create a report to display the teachers who were hired more than five years ago.
♦You need to display the names of the teachers who teach classes that start within the next week.
♦You need to create a report to display the teachers who teach more classes than the average number of classes taught by each teacher. (*)
♦You need to create a report to display the teachers who were hired more than five years ago.
♦You need to display the names of the teachers who teach classes that start within the next week.
♦You need to create a report to display the teachers who teach more classes than the average number of classes taught by each teacher. (*)
30. You need to remove a row from the EMPLOYEES table. Which statement would you use?
♦UPDATE with a WHERE clause
♦DELETE with a WHERE clause (*)
♦MERGE with a WHERE clause
♦INSERT with a WHERE clause
♦UPDATE with a WHERE clause
♦DELETE with a WHERE clause (*)
♦MERGE with a WHERE clause
♦INSERT with a WHERE clause
31. A column in a table can be given a default value. This option prevents NULL values from automatically being assigned to the column if a row is inserted without a specified value for the column. True or False ?
♦True (*)
♦False
♦True (*)
♦False
32. Multi-table inserts are used when the same source data should be inserted into _____________ target table.
♦A data warehouse
♦A very large
♦More than one (*)
♦Ten
♦A data warehouse
♦A very large
♦More than one (*)
♦Ten
33. In developing the Employees table, you create a column called hire_date. You assign the hire_date column a DATE datatype with a DEFAULT value of 0 (zero). A user can come back later and enter the correct hire_date. This is __________.
♦A great idea. When a new employee record is entered, if no hire_date is specified, the 0 (zero) will be automatically specified.
♦A great idea. When new employee records are entered, they can be added faster by allowing the 0’s (zeroes) to be automatically specified.
♦Both a and b are correct.
♦A bad idea. The default value must match the DATE datatype of the column. (*)
♦A bad idea. The default value must match the DATE datatype of the column. (*)
34. Aliases can be used with MERGE statements. True or False?
♦True (*)
♦False
♦True (*)
♦False
35. The MERGE statement first tries to update one or more rows in a table that match the criteria; if no row matches the criteria for the update, a new row will automatically be inserted instead. True or False?
♦True (*)
♦False
♦True (*)
♦False
36. Assume all the column names are correct. The following SQL statement will execute which of the following?
INSERT INTO departments
(department_id, department_name, manager_id, location_id)
VALUES (70, ‘Public Relations’, 100, 1700);
INSERT INTO departments
(department_id, department_name, manager_id, location_id)
VALUES (70, ‘Public Relations’, 100, 1700);
♦100 will be inserted into the department_id column.
♦1700 will be inserted into the manager_id column.
♦’Public Relations’ will be inserted into the manager_name column.
♦70 will be inserted into the department_id column. (*)
♦1700 will be inserted into the manager_id column.
♦’Public Relations’ will be inserted into the manager_name column.
♦70 will be inserted into the department_id column. (*)
37. To return a table summary on the customers table, which of the following is correct?
♦DESCRIBE customers, or DESC customers (*)
♦DISTINCT customers, or DIST customers
♦SHOW customers, or SEE customers
♦DEFINE customers, or DEF customers
♦DESCRIBE customers, or DESC customers (*)
♦DISTINCT customers, or DIST customers
♦SHOW customers, or SEE customers
♦DEFINE customers, or DEF customers
38. The PRODUCTS table contains these columns:
PRODUCT_ID NUMBER NOT NULL
PRODUCT_NAME VARCHAR2 (25)
SUPPLIER_ID NUMBER NOT NULL
LIST_PRICE NUMBER (7,2)
COST NUMBER (5,2)
QTY_IN_STOCK NUMBER(4)
LAST_ORDER_DT DATE DEFAULT SYSDATE NOT NUL
PRODUCT_ID NUMBER NOT NULL
PRODUCT_NAME VARCHAR2 (25)
SUPPLIER_ID NUMBER NOT NULL
LIST_PRICE NUMBER (7,2)
COST NUMBER (5,2)
QTY_IN_STOCK NUMBER(4)
LAST_ORDER_DT DATE DEFAULT SYSDATE NOT NUL
Which INSERT statement will execute successfully?
♦INSERT INTO products
VALUES (2958, ‘Cable’, 8690, 7.09, 4.04, SYSDATE);
VALUES (2958, ‘Cable’, 8690, 7.09, 4.04, SYSDATE);
♦INSERT INTO products(product_id, product_name)
VALUES (2958, ‘Cable’);
VALUES (2958, ‘Cable’);
♦INSERT INTO products (product_id, product_name, supplier_id, list_price, cost, qty_in_stock)
VALUES(2958, ‘Cable’, 8690, 7.09, 4.04, 700) (*)
VALUES(2958, ‘Cable’, 8690, 7.09, 4.04, 700) (*)
♦INSERT INTO products(product_id, product_name, supplier_id
VALUES (2958, ‘Cable’, 8690, SYSDATE);
VALUES (2958, ‘Cable’, 8690, SYSDATE);
39. Using the INSERT statement and assuming that a column can accept null values, how can you implicitly insert a null value in a column?
♦It is not possible to implicitly insert a null value in a column.
♦Use the NULL keyword.
♦Omit the column in the column list. (*)
♦Use the ON clause
♦It is not possible to implicitly insert a null value in a column.
♦Use the NULL keyword.
♦Omit the column in the column list. (*)
♦Use the ON clause
40. DML is an acronym that stands for:
♦Debit Markup Language
♦Data Markup Language
♦Data Manipulation Language (*)
♦Don’t Manipulate Language
♦Debit Markup Language
♦Data Markup Language
♦Data Manipulation Language (*)
♦Don’t Manipulate Language
41. Using your knowledge of the employees table, what would be the result of the following statement:
DELETE FROM employees;
♦Deletes employee number 100.
♦All rows in the employees table will be deleted if there are no constraints on the table. (*)
♦Nothing, no data will be changed.
♦The first row in the employees table will be deleted.
DELETE FROM employees;
♦Deletes employee number 100.
♦All rows in the employees table will be deleted if there are no constraints on the table. (*)
♦Nothing, no data will be changed.
♦The first row in the employees table will be deleted.
42. Examine the structures of the PLAYERS, MANAGERS, and TEAMS tables:
PLAYERS:
PLAYER_ID NUMBER Primary Key
LAST_NAME VARCHAR2 (30)
FIRST_NAME VARCHAR2 (25)
TEAM_ID NUMBER
MGR_ID NUMBER
SIGNING_BONUS NUMBER(9,2)
SALARY NUMBER(9,2)
PLAYERS:
PLAYER_ID NUMBER Primary Key
LAST_NAME VARCHAR2 (30)
FIRST_NAME VARCHAR2 (25)
TEAM_ID NUMBER
MGR_ID NUMBER
SIGNING_BONUS NUMBER(9,2)
SALARY NUMBER(9,2)
MANAGERS:
MANAGER_ID NUMBER Primary Key
LAST_NAME VARCHAR2 (20)
FIRST_NAME VARCHAR2 (20)
TEAM_ID NUMBER
MANAGER_ID NUMBER Primary Key
LAST_NAME VARCHAR2 (20)
FIRST_NAME VARCHAR2 (20)
TEAM_ID NUMBER
TEAMS:
TEAM_ID NUMBER Primary Key
TEAM_NAME VARCHAR2 (20)
OWNER_LAST_NAME VARCHAR2 (20)
OWNER_FIRST_NAME VARCHAR2 (20)
TEAM_ID NUMBER Primary Key
TEAM_NAME VARCHAR2 (20)
OWNER_LAST_NAME VARCHAR2 (20)
OWNER_FIRST_NAME VARCHAR2 (20)
Which situation would require a subquery to return the desired result?
♦To display the names of each player on the Lions team
♦To display the maximum and minimum player salary for each team
♦To display the names of the managers for all the teams owned by a given owner (*)
♦To display each player, their manager, and their team name for all teams with an id value greater than 5000
♦To display the maximum and minimum player salary for each team
♦To display the names of the managers for all the teams owned by a given owner (*)
♦To display each player, their manager, and their team name for all teams with an id value greater than 5000
43. You need to update the area code of employees that live in Atlanta. Evaluate this partial UPDATE statement:
UPDATE employee
SET area_code = 770
UPDATE employee
SET area_code = 770
Which of the following should you include in your UPDATE statement to achieve the desired results?
♦WHERE city = ‘Atlanta’; (*)
♦UPDATE city = Atlanta;
♦SET city = ‘Atlanta’;
♦LIKE ‘At%’;
♦UPDATE city = Atlanta;
♦SET city = ‘Atlanta’;
♦LIKE ‘At%’;
44. One of the sales representatives, Janet Roper, has informed you that she was recently married, and she has requested that you update her name in the employee database. Her new last name is Cooper. Janet is the only person with the last name of Roper that is employed by the company. The EMPLOYEES table contains these columns and all data is stored in lowercase:
EMPLOYEE_ID NUMBER(10) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
DEPARTMENT_ID VARCHAR2 (20)
HIRE_DATE DATE
SALARY NUMBER(10)
EMPLOYEE_ID NUMBER(10) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
DEPARTMENT_ID VARCHAR2 (20)
HIRE_DATE DATE
SALARY NUMBER(10)
Which UPDATE statement will accomplish your objective?
♦UPDATE employees last_name = ‘cooper’
WHERE last_name = ‘roper’;
WHERE last_name = ‘roper’;
♦UPDATE employees
SET last_name = ‘roper’
WHERE last_name = ‘cooper’;
SET last_name = ‘roper’
WHERE last_name = ‘cooper’;
♦UPDATE employees
SET cooper = ‘last_name’
WHERE last_name = ‘roper’;
SET cooper = ‘last_name’
WHERE last_name = ‘roper’;
♦UPDATE employees
SET last_name = ‘cooper’
WHERE last_name = ‘roper’; (*)
SET last_name = ‘cooper’
WHERE last_name = ‘roper’; (*)
45. What would happen if you issued a DELETE statement without a WHERE clause?
♦All the rows in the table would be deleted. (*)
♦Only one row would be deleted.
♦No rows would be deleted.
♦All the rows in the table would be deleted. (*)
♦Only one row would be deleted.
♦No rows would be deleted.
♦An error message would be returned.
InfoCad Blog 