//
select add_months(sysdate,1) from dual
//
select last_day(sysdate)+1 from dual
//
select to_date(to_char(sysdate,'yyyymm')||'01','yyyymmdd') from dual
//
select to_date('1970-1-1','yyyy-mm-dd') from dual
select add_months(sysdate,1) from dual
//
select last_day(sysdate)+1 from dual
//
select to_date(to_char(sysdate,'yyyymm')||'01','yyyymmdd') from dual
//
select to_date('1970-1-1','yyyy-mm-dd') from dual
