01-JAN-20转化为日期格式
SELECT TO_CHAR(TO_TIMESTAMP('01-JAN-20',
'dd-mon-yy',
'NLS_DATE_LANGUAGE = American'),
'yyyy-mm-dd HH24:MI:SS')
FROM DUAL;
SELECT TO_CHAR(TO_TIMESTAMP('01-JAN-20',
'dd-mon-yy',
'NLS_DATE_LANGUAGE = American'),
'yyyy-mm-dd HH24:MI:SS')
FROM DUAL;