I have the following sample two datasets which I would like to merge together and add the following flags: completeyr would be flagged if regcomplete is between startdate and enddate completegrace would be flagged if regcomplete is between extdate and startdate noncompliant would be flagged if the two conditions above are not met data data1; infile datalines delimiter = ','; input ID $ REPORT_ORDER $ ENTERDATE:mmddyy10. MONYR:monyy7. STARTDATE:mmddyy10. ENDDATE:mmddyy10. EXTDATE:mmddyy10.; format ENTERDATE STARTDATE ENDDATE EXTDATE mmddyy10. MONYR:monyy7.; datalines; 100,7,04/30/2019,APR2019,04/30/2018,04/30/2019,01/31/2018 100,11,08/31/2019,AUG2019,08/31/2018,08/31/2019,05/31/2018 100,3,12/31/2018,DEC2018,12/31/2017,12/31/2018,09/30/2017 100,5,02/28/2019,FEB2019,02/28/2018,02/28/2019,11/30/2017 100,4,01/31/2019,JAN2019,01/31/2018,01/31/2019,10/31/2017 100,10,07/31/2019,JUL2019,07/31/2018,07/31/2019,04/30/2018 200,9,06/30/2019,JUN2019,06/30/2018,06/30/2019,03/31/2018 200,6,03/31/2019,MAR2019,03/31/2018,03/31/2019,12/31/2017 200,8,05/31/2019,MAY2019,05/31/2018,05/31/2019,02/28/2018 200,2,11/30/2018,NOV2018,11/30/2017,11/30/2018,08/31/2017 200,1,10/31/2018,OCT2018,10/31/2017,10/31/2018,07/31/2017 200,13,10/31/2019,OCT2019,10/31/2018,10/31/2019,07/31/2018 200,12,09/30/2019,SEP2019,09/30/2018,09/30/2019,06/30/2018 ; run; data data2; infile datalines delimiter = ','; input ID $ MONYR:monyy7. REGCOMPLETE:mmddyy10.; format MONYR monyy7. REGCOMPLETE mmddyy10.; datalines; 100,DEC2017,12/08/2017 100,DEC2018,12/03/2018 100,OCT2019,10/24/2019 200,JUL2018,07/25/2018 ; run; In certain instances an ID can be flagged for completeyr and completegrace, in which case I would like to use the completeyr flag. Can anyone assist me with this? Below is an example of how I would like the data to look. If the complete data were represented there would be several other Id's and the other flag columns would have flags. ID REPORT_ORDER ENTERDATE MONYR STARTDATE ENDDATE EXTDATE REGCOMPLETE COMPLETEYR COMPLETEGRACE NONCOMPLIANT 100 3 12/31/2018 Dec-18 12/31/2017 12/31/2018 9/30/2017 12/3/2018 1 100 10 7/31/2019 Jul-19 7/31/2018 7/31/2019 4/30/2018 7/25/2018 1 200 13 10/31/2019 Oct-19 10/31/2018 10/31/2019 7/31/2018 10/24/2018 1
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