獲取系統(tǒng)時(shí)間函數(shù)

select now(); –2013-11-28 16:20:25.259715+08
select current_timestamp; –2013-11-28 16:20:38.815466+08
select current_date; –2013-11-28
select current_time; –16:21:08.981171+08