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Quiz von James Blair, aktualisiert more than 1 year ago
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Erstellt von James Blair
vor mehr als 9 Jahre
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Frage 1
Frage
Which clause in the following program is incorrect?
proc sql;
select sex, mean(weight) as avgweight
from company.employees company.health
where employees.id=health.id
group by sex;
Antworten
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GROUP BY
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FROM
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WHERE
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SELECT
Frage 2
Frage
How many statements does the program below contain?
proc sql;
select grapes, oranges,
grapes+oranges as sumsales
from sales.produce
order by sumsales;
Antworten
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two
-
three
-
four
-
five
Frage 3
Frage
Which of the clauses below correctly sorts rows by the values of the columns Price and SqFeet?
Antworten
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a. order by price, sqfeet
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b. order price, sqfeet
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c. sort price sqfeet
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d. sort by price sqfeet
Frage 4
Frage
Complete the following PROC SQL query to select the columns Address and SqFeet from the table List.Size and to select Price from the table List.Price. (Only the Address column appears in both tables.)
proc sql;
__________
from list.size, list.price;
Antworten
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a. Either select size.address, sqfeet, price or select price.address, sqfeet, price
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b. select size.address, sqfeet, price
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c. select price.address, sqfeet, price
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d. select address, sqfeet, price
Frage 5
Frage
What happens if you use a GROUP BY clause in a PROC SQL step without a summary function?
Antworten
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a. The first numeric column is summed by default.
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b. The GROUP BY clause is changed to an ORDER BY clause.
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c. The step does not execute.
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d. The step executes but does not group or sort data.
Frage 6
Frage
Which of the following will cause PROC SQL to list rows that have no data in the Address column?
Antworten
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a. WHERE address is null
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b. WHERE address not exists
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c. WHERE address is missing
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d. Both WHERE address is missing and WHERE address is null
Frage 7
Frage
Consider this PROC SQL query:
proc sql;
select flightnumber,
count(*) as Flights,
avg(boarded)
label="Average Boarded"
format=3.
from sasuser.internationalflights
group by flightnumber
having avg(boarded) > 150;
The table Sasuser.Internationalflights contains 201 rows, 7 unique values of FlightNumber, 115 unique values of Boarded, and 4 different flight numbers that have an average value of Boarded that is greater than 150. How many rows of output will the query generate?
Antworten
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a. 1
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b. 150
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c. 4
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d. 7
Frage 8
Frage
You are writing a PROC SQL query that will display the names of all library cardholders who work as volunteers for the library, and the number of books that each volunteer currently has checked out. You will use one or both of the following tables:
Library.Circulation lists the name and contact information for all library cardholders, and the number of books that each cardholder currently has checked out.
Library.Volunteers lists the name and contact information for all library volunteers.
Assume that the values of Name are unique in both tables. Which of the following PROC SQL queries will produce your report?
Antworten
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a. proc sql; select name from library.volunteers where name, checkedout in (select name, checkedout from library.circulation);
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b. proc sql; select name, checkedout from library.circulation where name in (select name from library.volunteers);
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c. proc sql; select name, checkedout from library.circulation where name in (select name from library.volunteers;);
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d. proc sql; select name, checkedout from library.circulation where * in (select * from library.volunteers);
Frage 9
Frage
You are creating a PROC SQL query that will list all employees who have spent (or overspent) their allotted 120 hours of vacation for the current year. The hours that each employee used are stored in the existing column Spent. Your query defines a new column, Balance, to calculate each employee's balance of vacation hours.
Which query will produce the report that you want?
Antworten
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a. proc sql; select name, spent, 120-spent as calculated Balance from Company.Absences where balance <= 0;
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b. proc sql; select name, spent, 120-spent as calculated Balance from Company.Absences where calculated balance <= 0;
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c. proc sql; select name, spent, 120-spent as Balance from Company.Absences where balance <= 0;
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d. proc sql; select name, spent, 120-spent as Balance from Company.Absences where calculated balance <= 0;
Frage 10
Frage
Which statement about the following PROC SQL query is false?
proc sql;
validate
select name label='Country',
rate label='Literacy Rate'
from world.literacy
where 'Asia' =
(select continent
from world.continents
where literacy.name =
continents.country)
order by 2;
Antworten
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a. PROC SQL will not execute this query when it is submitted.
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b. The query syntax is not valid.
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c. After the query is submitted, the SAS log will indicate whether the query has valid syntax.
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d. The outer query must pass values to the subquery before the subquery can return values to the outer query.
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