Before select * from task where to_date (deadline, 'yyyymm') <to_date ( '201909', 'yyyymmdd') // query specified month
select * from task where to_date (deadline, 'yyyymmdd') <now () // query before the current date
Before select * from task where to_date (deadline, 'yyyymm') <to_date ( '201909', 'yyyymmdd') // query specified month
select * from task where to_date (deadline, 'yyyymmdd') <now () // query before the current date