topic Re: Merge two datasets without common variable in SAS Programming

Merge two datasets without common variable

DingDing — Sun, 25 Oct 2015 21:32:46 GMT

I want to merge two datasets the variable in dataset 1is IATA and in dataset2 is UNIQUE_CARRIER. In the output, I want to remove the obserbations that "IATA" does'not have. Generally I know use the "PROC merge" like that. but it seems it only works when they have common variable. I don't know how to do if they don't have common name of a variable. could anybody give me some instructions?

DATA  dataset3;
MERGE dataset1 (IN=a) 
dataset2 (IN=b );
By common_variable
IF a=1;
RUN;

one is

IATA

UNIQUE_CARRIER

Re: Merge two datasets without common variable

kannand — Sun, 25 Oct 2015 22:03:22 GMT

Rename the key variable for the merge as shown below and it should take care of your problem.

DATA IATA  ;
 INPUT IATA:$2.;
DATALINES;
B1      
OO     
QU      
;
RUN;
DATA UNIQUE_CARRIER ;
 INPUT UNIQUE_CARRIER:$2.;
DATALINES; 
AA
AA
B1                               
OO                              
QU  
;
RUN;
PROC SORT DATA=IATA;
  BY IATA;
RUN;
PROC SORT DATA=UNIQUE_CARRIER(RENAME=UNIQUE_CARRIER=IATA);
  BY IATA;
RUN;
DATA NEW_IATA;
     MERGE IATA(IN=A)
           UNIQUE_CARRIER(IN=B);
        BY IATA;
     IF A;
RUN;
PROC PRINT;
RUN;

The output it generates is here for your reference:


Obs	IATA
1	B1
2	OO
3	QU

Re: Merge two datasets without common variable

kannand — Sun, 25 Oct 2015 22:10:03 GMT

I should have mentioned that the rename is in the sort step in my code above

Re: Merge two datasets without common variable

DingDing — Sun, 25 Oct 2015 22:45:40 GMT

You are the most experienced man I have ever seen. Thank you, so nice of you !

Re: Merge two datasets without common variable

kannand — Sun, 25 Oct 2015 22:48:31 GMT

Thanks for your kind words. I'm learning too. There are much more knowledgeable and experienced experts in this forum, you'll notice. Not to mention, there are employees of SAS as well, you are here to help us.

Good luck and have fun with SAS DingDing.