SQL> alter session set NLS_TERRITORY='RUSSIA'; Session altered. SQL> select to_char(to_date('13-09-2015','DD-MM-YYYY'),'D') from dual; T - 7 SQL> alter session set NLS_TERRITORY='AMERICA'; Session altered. SQL> select to_char(to_date('13-09-2015','DD-MM-YYYY'),'D') from dual; T - 1
decode(day_number_start, 1, 'ПН', 2, 'ВТ', 3, 'СР', 4, 'ЧТ', 5, 'ПТ', 6, 'СБ', 7, 'ВС' )
select to_char(sysdate,'DAY'), to_char(to_date(to_char(sysdate,'DAY'),'DAY'),'D') from dual
select to_char(sysdate,'DAY'), to_char(to_date('ВТОРНИК','DAY'),'D') from dual