oracle获取当前时间,精确到毫秒并指定精确位数的实现方法

oracle获得当前时间的，精确到毫秒   可以指定精确豪秒的位数

select to_char(systimestamp, 'yyyymmdd hh24:mi:ss.ff ') from dual;--20120516 11:56:40.729083

select to_char(systimestamp, 'yyyymmdd hh24:mi:ss.ff3') from dual;--20120516 11:58:42.755

desc ct_cdr_comparison

名称                          空值       类型           
--------------------------- -------- -------------
DATTCDRCOMPARISONGUID       NOT NULL TIMESTAMP(9) 
VC2CUSTOMER                          VARCHAR2(200)
VC2M800                              VARCHAR2(200)
NUMSTATE                             NUMBER(1)    
NUMMARGINCALLTIME_MIN                NUMBER(10)   
NUMMARGINCBEGIN_MIN                  NUMBER(10)   
NUMCDR_COMPARISONDETAILGUID          NUMBER(10)   
DATCREATEADATE                       DATE         
DATOPERATEDATE                       DATE         
VC2CREATECODE                        VARCHAR2(200)
VC2OPERECODE                         VARCHAR2(200)
VC2REMARK                            VARCHAR2(200)

 
select * from ct_cdr_comparison;
 
2012-05-16 13:17:14.340213000 a m800 0 20 20 1 2012-05-16 13:17:14  liuwen 
2012-05-16 13:19:36.659724000 a m800 0 20 20 2 2012-05-16 13:19:36  liuwen 

如果结果没显示：请设置时间戳

工具==》选项==》数据库==》NLS

时间戳格式：YYYY-MM-DD HH24:MI:SS.FF

insert into ct_cdr_comparison 
 ( dattCDRCOMPARISONGUID,
 VC2CUSTOMER,
 VC2M800,
 NUMSTATE,
 NUMMARGINCALLTIME_MIN,
 NUMMARGINCBEGIN_MIN,
 NUMCDR_COMPARISONDETAILGUID,
 DATCREATEADATE,
 vc2createcode
 )
values (systimestamp,'a','m800',0,20,20,2,sysdate,'liuwen');