тест selory / 28

Question 38

Correct

1.00 points out of 1.00

Question 39

Incorrect

0.00 points out of 1.00

What is the difference between data definition language and data manipulation language?

Select one:

a. It is used to create tables, views, etc., and data manipulation language is only used for inserts

b. It is used for queries and data manipulation language is used for updating and deleting tables only

c. It is used to create the files that store tables whereas data manipulation language is used to update data

d. It is used to create tables, indexes, etc., whereas data manipulation language is used to query the database

Your answer is correct.

Which of the following is a data manipulation command?

Select one:

a. Alter

b. Create

c. Drop

d. Select

Question 40

Incorrect

0.00 points out of 1.00

Assume that we have a table called student with the following columns: (sid,fname,lname,major)

What is wrong with this insert command?

insert into student ('s2234','John','Smith','Chemistry')

Select one:

a. It is missing a left parenthesis

b. It is missing a right parenthesis

c. It is missing a value before the parenthesis

d. There are not enough fields in the statement

Question 44

Incorrect

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Question 45

Correct

1.00 points out of 1.00

What will the following query return for results?

select lname from customer

where credit_limit in (1000,2000,3000)

Select one:

a. All last names and credit limits from 1000 to 2000, and 2000 to 3000

b. The last name of all customers with a credit limit of 1000, 2000, or 3000

c. All last names and credit limits where the credit limit is 1000, 2000, 3000

d. The last name of all customers with a credit from 1000 to 2000, and 2000 to 3000

What will this SQL statement produce for output? select distinct lname,fname,dob

from customer

Select one:

a. Customer data rows so that there are no duplicates

b. Customer rows so that there are no duplicate records

c. Customer rows so that there are no duplicate customers

d. Customer data rows so that there are no duplicate names

Question 46

Incorrect

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Question 47

Incorrect

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What would the following query produce for results?

select count(*) from customer

where credit_limit > 500

Select one:

a. A listing of all customers

b. A listing of all customers with a credit limit greater than 500

c. A count of all customers

d. A count of all customers with a credit limit greater than 500

What does an inner join do?

Select one:

a. Return all rows in all tables

b. Return only those rows with a matching row in the corresponding table

c. Return all rows in the right table regardless of whether there is a match in the left table

d. Return all rows in the left or right table regardless of whether there is a match in the corresponding table

Question 48

Incorrect

0.00 points out of 1.00

You are given this table:

Registration

What will the result of the following query be? select sid, count(*)

from registration

group by sid

Select one:

a. The entire table sorted by sid

b. No results due to an error

c. 282712 2 362112 2

652123 1

d. 282712 1 362112 1

652123 1

Your answer is incorrect.

Question 49

Incorrect

0.00 points out of 1.00

You are given the following tables:

Course

Registration

Student

What would the following SQL Select statement produce for output?

select course.Description,registration.SID,registration.grade, student.lname

from registration

inner join course

on registration.courseID = course.courseID

inner join student on registration.sid = student.sid

Select one:

a. No output, since this query cannot be performed

b. Technical Writing 282712 B+ Jones

c. Technical Writing 282712 B+ Jones

Computer Science I 362112 Williams C

d. Technical Writing 282712 B+ Jones

Computer Science I 362112 Williams C

Null 652123 Null A

Your answer is incorrect.

Question 50

Incorrect

0.00 points out of 1.00

You are given the following tables:

Course

Registration

What would the following SQL Select statement produce for output? select course.Description,registration.SID,registration.grade

from registration

full join course

on registration.courseID = course.courseID

Select one:

a. Technical Writing 28212 B+

b. Technical Writing 28212 B+

Computer Science I 362112 C

Null 652123 A

c. Technical Writing 28212 B+

Computer Science I 362112 C

Elementary Data Structures null null

d. Technical Writing 28212 B+

Computer Science I 362112 C

Null 652123 A

Elementary Data Structures null null

Your answer is incorrect.