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HomeDatabaseMysql TutorialOracle时间型数据的insert语句

insert into Table_A(name,AddTime) values(

  insert into Table_A(name,AddTime) values('A5db09',to_date('2004-9-13 17:47:34','yyyy-mm-dd hh:mm:ss')------------------------------------------------------------Oracle中date类型字段的处理

  ——ORACLE/JSP技术涉及日期、时间问题的处理

  (1)在英文版本的ORACLE中默认日期格式为'DD-MON-YY',例如'01-JAN-98'

  在汉化的中文版本中ORACLE默认日期格式为'日-月-年',例如'21-8月-2003'或'21-8月-03'

  (2)转换字符串为日期

  使用ORACLE内部函数to_date()

  to_date()函数的参数是to_char()函数参数的反转。

  to_date(string_value , date_format)

  变量定义如下:

  string_value :为字符串直接值(字符串本身)、字符串列(数据库中定义的某个表的某列)或某字符串内部函数的返回值。

  date_format为合法的Oracle日期格式。

  下列更新语句均符合ORACLE的日期格式,更新成功:

  create table student (name varchar2(10) not null primary key , enrolldate date not null);//创建student表

  insert into student values('mark',to_date('08-21-2003','MM-DD-YYYY'));

  insert into student values('mark1',to_date('21-08-2003','DD-MM-YYYY'));

  insert into student values('mark2','21-8月-2003');

  insert into xiongxiaomin.student values('mark3','21-8月-03');

  (3)转换日期为字符串

  使用ORACLE内部函数to_char()

  to_char(date_value,date_format)

  变量定义如下:

  date_value :为日期型直接值(日期本身)、日期型列值(数据库中定义的某个表的某列)或某内部函数的返回的日期型值。

  date_format为合法的Oracle日期格式。

  选择enrolldate字段的时间部分:

  select (to_char(enrolldate,'HH24:MI:SS'))enrolldate from   student;

  (4)注意:ORACLE中的date数据类型定义的列包含日期和时间。

  1、系统当前日期为2003年8月21日,之后执行下列语句

  insert into student values('mark5',to_date('09:28:03','HH:MI:SS'));//注意此种在一条记录的date类型字段中插入时间的方法,系统默认的日期为系统当前日期所在月份的第一天,因此得到的记录为

  Name            enrolldate

  -----------------------------------

  mark5    01-八月 -2003 09:28:03 AM

  2、修改系统当前日期为2003年7月21日,之后执行下列语句

  insert into student values('mark6',to_date('09:28:03','HH:MI:SS'));

  得到的记录为

  Name            enrolldate

  -----------------------------------

  mark6     01-七月 -2003 09:28:03 AM

  insert into student values('mark8',to_date('20:28:03','HH24:MI:SS'));

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