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--获取当前日期:
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select current date from sysibm.sysdummy1;
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values current date;
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--获取当前日期
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select current time from sysibm.sysdummy1;
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values current time;
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--获取当前时间戳
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select current timestamp from sysibm.sysdummy1;
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values current timestamp;
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--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:
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values current time -current timezone;
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values current timestamp -current timezone;
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--获取当前年份
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values year(current timestamp);
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--获取当前月
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values month(current timestamp);
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--获取当前日
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values day(current timestamp);
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--获取当前时
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values hour(current timestamp);
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--获取分钟
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values minute(current timestamp);
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--获取秒
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values second(current timestamp);
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--获取毫秒
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values microsecond(current timestamp);
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--从时间戳记单独抽取出日期和时间
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values date(current timestamp);
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values VARCHAR_FORMAT(current TIMESTAMP,'yyyy-mm-dd');
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values char(current date);
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values time(current timestamp);
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--执行日期和时间的计算
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values current date+1 year;
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values current date+3 years+2 months +15 days;
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values current time +5 hours -3 minutes +10 seconds;
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--计算两个日期之间的天数
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values days(current date)- days(date('2010-02-20'));
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--时间和日期换成字符串
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values char(current date);
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values char(current time);
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--要将字符串转换成日期或时间值
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values timestamp('2010-03-09-22.43.00.000000');
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values timestamp('2010-03-09 22:44:36');
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values date('2010-03-09');
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values date('03/09/2010');
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values time('22:45:27');
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values time('22.45.27');
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--计算两个时间戳记之间的时差:
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--秒的小数部分为单位
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values timestampdiff(1,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--秒为单位
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values timestampdiff(2,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--分为单位
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values timestampdiff(4,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--小时为单位
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values timestampdiff(8,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--天为单位
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values timestampdiff(16,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--周为单位
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values timestampdiff(32,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--月为单位
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values timestampdiff(64,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--季度为单位
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values timestampdiff(128,char(current timestamp - timestamp('2010-01-01-00.00.00')));
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--年为单位
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- values timestampdiff(256,char(current timestamp - timestamp('2010-01-01-00.00.00')));