Convert multiple columns to one column

[swimmer23]

Hello, 

I have the following dataset (here is an excerpt from it): 

product_category	part1	part2	part3	part4
hose_connector	connector1	connector2	connector3	connector4
printer	printer1	printer2	printer3	printer4
glasses	glasses1	glasses2	glasses3	glasses4

I want to convert the dataset shown above into the following one:

hose_connector	connector1
hose_connector	connector2
hose_connector	connector3
hose_connector	connector4
printer	printer1
printer	printer2
printer	printer3
printer	printer4
glasses	glasses1
glasses	glasses2
glasses	glasses3
glasses	glasses4

Can anyone tell me what SAS command I can use to create this transpose of the data?

Thank you in advance for your support. 

[Reeza · Accepted solution]

Have you tried PROC TRANSPOSE?

https://stats.oarc.ucla.edu/sas/modules/how-to-reshape-data-wide-to-long-using-proc-transpose/

proc transpose data=have out=want;
by product_category;
run;