PROC SQL - UPDATE WITHOUT OVERWRITING WITH MISSING VALUES

kmcnulty — Fri, 09 Jun 2017 14:32:39 GMT

I am trying to update a master table with a reference table but my reference table isn't perfect and I don't want it to overwrite my master table if it's missing some of the devices I need.

I was thinking when I submit the following code it wouldn't update my speeds in my master table if they weren't in my reference table but it seems to still set my master table values to missing if they are not in the reference table. Am I missing something?

proc sql;

update mastertable tableA

set speed = (select Speed

from referencetable

where (tableA.device = device and tablea.daydate between min_daydate AND max_daydate));

where device in(select device from referencetable);

quit;

Re: PROC SQL - UPDATE WITHOUT OVERWRITING WITH MISSING VALUES

kmcnulty — Fri, 09 Jun 2017 16:11:02 GMT

I figured it out!!!!

proc sql;

update mastertable tableA

set speed = case when device in (select device from referencetable) then (select Speed

from referencetable

where (tableA.device = device and tablea.daydate ge min_daydate and tablea.daydate lt max_daydate)) else speed end;

where device in (select device from referencetable);

quit;

topic PROC SQL - UPDATE WITHOUT OVERWRITING WITH MISSING VALUES in SAS Programming

PROC SQL - UPDATE WITHOUT OVERWRITING WITH MISSING VALUES

Re: PROC SQL - UPDATE WITHOUT OVERWRITING WITH MISSING VALUES