Question

Based on the following program and data, how many rows will be included in the payment table?

proc sort data=payment dupout=dups nodupkey;
by ID;
run;

ID-------AMOUNT
A-------$997.54
A-------$833.88
B-------$879.05
C-------$894.77
C-------$894.77
C-------$998.26

a. 1
b. 3
c. 5
d. 6

Answer 1

After the PROC SORT command with 'nodupkey' is executed in SAS, the 'payment' table will contain 5 rows. It will remove only the exact duplicate entries for the same ID and retain unique amount values even if the ID is repeated.

Step-by-step explanation:

The program provided involves a PROC SORT procedure in SAS (Statistical Analysis System), which is used to sort and remove duplicate values from a dataset. You are asked to determine how many rows will be in the 'payment' table after the code executes, given the provided data.

The code contains the following command: nodupkey, which removes duplicate rows based on the specified 'by' variable, which in this case is the ID. When we observe the provided data.
we can see that the ID 'C' has a duplicate amount of $894.77 which will be removed by the 'nodupkey' option. Therefore, after the PROC SORT procedure, the table will retain one instance of each unique ID and amount combination. Thus, the resulting number of rows will be 5, with IDs A, B, and C being represented (ID A has two different amounts, ID B has one amount, and ID C has two unique amounts).