select to_char(sysdate,'mm') as nowMonth from dual; //获取时间的月 select to_char(sysdate,'dd') as nowDay from dual; //获取时间的日 select to_char(sysdate,'hh24') as nowHour from dual; //获取时间的时 select to_char(sysdate,'mi') as nowMinute from dual; //获取时间的分 select...
1. 日期和字符转换函数用法(to_date,to_char)select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') as nowTime from dual; //日期转化为字符串 select to_char(sysdate,'yyyy') as nowYear from dual; //获取时间的年 select to_char(sysdate,'mm') as nowMonth from dual; //获取时间的月 select ...
1、Oracle中的时间类型只有date和TIMESTAMP,TIMESTAMP是比date更精确的类型 ⑴DATE类型:ORACLE最常用的日期类型,它可以保存日期和时间,常用日期处理都可以采用这种类型 ⑵TIMESTAMP类型:ORACLE常用的日期类型,它与date的区别是TIMESTAMP类型不仅可以保存日期和时间,还能保存小数秒,小数位数可以指定为0-9,默认为6位 2、...
postgresql内核开发之Oracle date类型兼容 ORACLE的date类型,不专注于date,还带有time,不像postgres,date就date,不带时间,两者之间的差异就造成了一些应用做迁移时的麻烦,如果原来逻辑就是需要date有时分秒,不能接受postgres的date没有时分秒,这就需要增加一个新的date类型。 古人云:谋而后动,知止而有得。先看看post...
输入的格式要看你安装的ORACLE字符集的类型, 比如: US7ASCII, date格式的类型就是: '01-Jan-01' alter system set NLS_DATE_LANGUAGE = American alter session set NLS_DATE_LANGUAGE = American //或者在to_date中写 select to_char(to_date('2002-08-26','yyyy-mm-dd'), ...
YearMonth date = YearMonth.now(); System.out.printf("%s: %d%n", date, date.lengthOfMonth()); YearMonth date2 = YearMonth.of(2010, Month.FEBRUARY); System.out.printf("%s: %d%n", date2, date2.lengthOfMonth()); YearMonth date3 = YearMonth.of(2012, Month.FEBRUARY); ...
This function returns the current date. The date is determined by the system in which the Oracle BI Server is running. Syntax Copy CURRENT_DATE Example: TIMESTAMPDIFF(SQL_TSI_DAY, "Requisition Dates"."First Fully Approved Date", CURRENT_DATE) ...
***1.row***DATE_SUB(NOW(),INTERVAL5DAY):2021-08-1814:56:32DATE_SUB('2014-01-10',INTERVAL5MICROSECOND):2014-01-0923:59:59.999995DATE_SUB('2014-01-10',INTERVAL5SECOND):2014-01-0923:59:55DATE_SUB('2014-01-10',INTERVAL5MINUTE):2014-01-0923:55:00DATE_SUB('2014-01-10',INTERVAL5...
NOW([fsp]) Returns the current date and time as a value in 'YYYY-MM-DD hh:mm:ss' or YYYYMMDDhhmmss format, depending on whether the function is used in string or numeric context. The value is expressed in the session time zone. If the fsp argument is given to specify a fractional...
Oracle CURRENT_DATE function : CURRENT_DATE returns the current date in the session time zone, in a value in the Gregorian calendar of datatype DATE. This tutorial explains how to use the CURRENT_DATE function with syntax, parameters, examples and explan