DB2时间函数大全_时间加减
时间加减：后边记得跟上时间类型如day、HOURTIMESTAMP ( TIMESTAMP(DEF_TIME)+1 day)+18 HOUR
DB2时间函数是我们最常见的函数之一，下面就为您介绍一些DB2时间函数，供您参考，希望可以让您对DB2时间函数有更多的了解。
[*]--获取当前日期：
[*]
[*]select current date from sysibm.sysdummy1;
[*]values current date;
[*]
[*]--获取当前日期
[*]select current time from sysibm.sysdummy1;
[*]values current time;
[*]--获取当前时间戳
[*]select current timestamp from sysibm.sysdummy1;
[*]values current timestamp;
[*]
[*]--要使当前时间或当前时间戳记调整到 GMT/CUT，则把当前的时间或时间戳记减去当前时区寄存器：
[*]
[*]values current time -current timezone;
[*]values current timestamp -current timezone;
[*]
[*]--获取当前年份
[*]
[*]values year(current timestamp);
[*]
[*]--获取当前月
[*]values month(current timestamp);
[*]
[*]--获取当前日
[*]values day(current timestamp);
[*]
[*]--获取当前时
[*]values hour(current timestamp);
[*]
[*]--获取分钟
[*]values minute(current timestamp);
[*]
[*]--获取秒
[*]values second(current timestamp);
[*]
[*]--获取毫秒
[*]values microsecond(current timestamp);
[*]
[*]--从时间戳记单独抽取出日期和时间
[*]
[*]values date(current timestamp);
[*]values VARCHAR_FORMAT(current TIMESTAMP,'yyyy-mm-dd');
[*]values char(current date);
[*]values time(current timestamp);
[*]
[*]--执行日期和时间的计算
[*]
[*]values current date+1 year;
[*]values current date+3 years+2 months +15 days;
[*]values current time +5 hours -3 minutes +10 seconds;
[*]
[*]--计算两个日期之间的天数
[*]
[*]values days(current date)- days(date('2010-02-20'));
[*]
[*]--时间和日期换成字符串
[*]
[*]values char(current date);
[*]values char(current time);
[*]
[*]--要将字符串转换成日期或时间值
[*]
[*]values timestamp('2010-03-09-22.43.00.000000');
[*]values timestamp('2010-03-09 22:44:36');
[*]values date('2010-03-09');
[*]values date('03/09/2010');
[*]values time('22:45:27');
[*]values time('22.45.27');
[*]
[*]--计算两个时间戳记之间的时差：
[*]
[*]--秒的小数部分为单位
[*]values timestampdiff(1,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--秒为单位
[*]values timestampdiff(2,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--分为单位
[*]values timestampdiff(4,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--小时为单位
[*]values timestampdiff(8,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--天为单位
[*]values timestampdiff(16,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--周为单位
[*]values timestampdiff(32,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--月为单位
[*]values timestampdiff(64,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--季度为单位
[*]values timestampdiff(128,char(current timestamp - timestamp('2010-01-01-00.00.00')));
[*]--年为单位
[*]values timestampdiff(256,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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