I am currently running the following Korn shell script which works fine:

#!/usr/bin/ksh
count=`db2 -x "select count(*) from schema.tablename"`
echo "count"

I would like to add a "where" clause to the 2nd line that would allow me to get a record count of all the records from schema.tablename where PROCESS_DT(a datetime variable in tablename which is formatted as DATE9.) is equal to the today's unix system date - 1. I'm not sure of the proper syntax. Please help.

count=`db2 -x "select count(*) from schema.tablename where PROCESS_DT=UNIX system date-1"`