Oracle-时间与字符串转换

--UPDATE_TIME 是时间，直接转成字符串
SELECT to_char(MAX(UPDATE_TIME), \'yyyy-mm-dd hh24:mi:ss\') as lastUpdateTime,
       to_char(sysdate, \'yyyy-mm-dd hh24:mi:ss\') as accountTime
  FROM QLK_AREA;
  
-- LASTUPDATETIME 是字符串，先转成时间，再转成字符串
SELECT to_char(to_date(MAX(LASTUPDATETIME), \'yyyymmddhh24miss\'),
               \'yyyy-mm-dd hh24:mi:ss\') as lastUpdateTime,
       to_char(sysdate, \'yyyy-mm-dd hh24:mi:ss\') as accountTime
  FROM PSN_MZ_LHDJXX_BL;