how to delete the company if any of the observation is missing?

[srikanthyadav44]

dear all 

i have the panel data of nearly 2000 companies for 10 years. for each company, each company is multiple number of board of directors. the number is not same of all the companies. the status of director is either independent or non-independent. 

For some companies in the dataset, director status is missing. 

i want to delete all the companies which are having missing observation on director status for a concerned year. the same company may not be having any missing observations on director status in other years. so, year-wise, i have to delete the companies which are having such missing observations. 

the example of the dataset is as follows

company_name	director	year	director_status
20 Microns Ltd.	CHANDRESH PARIKH	2018	Non-independent
20 Microns Ltd.	RAJESH PARIKH	2018
20 Microns Ltd.	ATIL C PARIKH	2018	Independent
20 Microns Ltd.	SUDHIR R PARIKH	2018	Independent
3M India Ltd.	P M SHAH	2018	Independent
3M India Ltd.	R A DEVIDAYAL	2018	Independent
3M India Ltd.	ATUL H PATEL	2018	Non-independent
3M India Ltd.	DARSHA KIKANI (MRS.)	2018	Non-independent
20 Microns Ltd.	AJAY I RANKA (DR.)	2017	Non-independent
20 Microns Ltd.	SEJAL R PARIKH (MRS.)	2017	Non-independent
20 Microns Ltd.	ASHOK SHAH	2017	Independent
20 Microns Ltd.	SAROJINI DIKHALE (MS.)	2017	Independent
3M India Ltd.	SHANTANU PRASAD	2017	Independent
3M India Ltd.	SHASHANK DESAI (DR.)	2017	Independent
3M India Ltd.	GAUTAM DUTTA	2017	Non-independent
3M India Ltd.	SHANTI LAL JAIN	2017	Non-independent
20 Microns Ltd.	PADMANABHAN IYER	2016	Non-independent
20 Microns Ltd.	BHARAT D SHAH	2016	Non-independent
20 Microns Ltd.	RADHIKA RAJAN	2016	Independent
20 Microns Ltd.	BIREN GABHAWALA	2016	Independent
3M India Ltd.	DEBARATI SEN	2016	Independent
3M India Ltd.	B V SHANKARANARAYANA RAO	2016	Independent
3M India Ltd.	ALBERT C WANG	2016
3M India Ltd.	AMIT LAROYA	2016	Non-independent

In the above data set, i have to delete 20 Microns Ltd.in the year 2018 and 3M India Ltd. in 2016. 

please suggest me an appropriate SAS code, to perform the said function. 

thanks in advance. 

[novinosrin]

Hi @srikanthyadav44  See if this helps

proc sql;
create table want as
select *
from have
group by company_name,year
having not sum(director_status=' ');
quit;

[Kurt_Bremser · Accepted solution]

Sort by company_name and year, then do

data want;
merge
  have
  have (in=d where=(director_status = ''))
;
by company_name year;
if not d;
run;