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b******s
发帖数: 345 | 1 The following SAS program is submitted:
data work.empsalary;
set work.people(in=inemp) work.money(in=insal);
if insal and inemp;
run;
The SAS data set work.people has 5 observations, and the data set work.money
has 7 observations.
How many observations will the data set work.empsalary contain?
A. 0
B. 5
C. 7
D. 12
Answer: A
我怎么觉得是D啊，请知道正确答案的讲解下，谢谢！！！ | s******r
发帖数: 1524 | 2 set work.people(in=inemp) work.money(in=insal);
by XXXXXX;
baozi
money
【在 b******s 的大作中提到】
: The following SAS program is submitted:
: data work.empsalary;
: set work.people(in=inemp) work.money(in=insal);
: if insal and inemp;
: run;
: The SAS data set work.people has 5 observations, and the data set work.money
: has 7 observations.
: How many observations will the data set work.empsalary contain?
: A. 0
: B. 5
| b******s
发帖数: 345 | 3 你的意思是 set语句后面紧跟着BY?
谢谢回复！包子已发。
【在 s******r 的大作中提到】
: set work.people(in=inemp) work.money(in=insal);
: by XXXXXX;
: baozi
:
: money
| y********0
发帖数: 638 | 4 查一下in=的意思就知道了.
if insal and inemp 是说the new obs can be found in both the datasets.
但是set a b只是简单的concatenate ,就是两个数据接起来.永远都是
insal=1,inemp=0 或者insal=0,inemp=1组合.
money
【在 b******s 的大作中提到】
: The following SAS program is submitted:
: data work.empsalary;
: set work.people(in=inemp) work.money(in=insal);
: if insal and inemp;
: run;
: The SAS data set work.people has 5 observations, and the data set work.money
: has 7 observations.
: How many observations will the data set work.empsalary contain?
: A. 0
: B. 5
| b******s
发帖数: 345 | 5 谢谢！
【在 y********0 的大作中提到】
: 查一下in=的意思就知道了.
: if insal and inemp 是说the new obs can be found in both the datasets.
: 但是set a b只是简单的concatenate ,就是两个数据接起来.永远都是
: insal=1,inemp=0 或者insal=0,inemp=1组合.
:
: money
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