如果EVENT_GMT_TIMESTAMP的数据类型是TIMESTAMP，则它是简单的标准SQL：
CAST(EVENT_GMT_TIMESTAMP AS DATE)CAST(EVENT_GMT_TIMESTAMP AS TIME)
如果是CHAR，则也需要应用FORMAT：
CAST(CAST(EVENT_GMT_TIMESTAMP AS TIMESTAMP FORMAT 'dd/mm/yyyyBhh:mi:SS.s(6)') AS DATE)CAST(CAST(EVENT_GMT_TIMESTAMP AS TIMESTAMP FORMAT 'dd/mm/yyyyBhh:mi:SS.s(6)') AS TIME)
编辑：
为了简单地更改显示格式，您需要在字符串中添加FORMAT和CAST：
CAST(CAST(EVENT_GMT_TIMESTAMP AS FORMAT 'YYYYMMDDHHMI') AS CHAr(12))orCAST(CAST(EVENT_GMT_TIMESTAMP AS FORMAT 'YYYYMMDDHHMISS') AS CHAr(14))
如果您不关心显示，只想截断秒数：
EVENT_GMT_TIMESTAMP - (EXTRACT(SECOND FROM EVENT_GMT_TIMESTAMP) * INTERVAL '1.000000' SECOND)
使用时间戳有点棘手:-)
