Extract date, time from a given datetime in Oracle The EXTRACT() function is used to extract the value of a specified datetime field from a datetime or interval expression. Uses of Oracle EXTRACT (datetime) Fun
selectmonths_between(sysdate, add_months(sysdate,1) from dual ;-- 返回 1 2.6EXTRACT 格式:EXTRACT(timeunitFROMdatetime) 含义: 从日期值中提取部分日期,如从一个日期提取月份值。 EXTRACT ( {YEAR|MONTH|DAY|HOUR|MINUTE|SECOND} | { TIMEZONE_HOUR | TIMEZONE_MINUTE } | { TIMEZONE_REGION | TIMEZ...
When extracting from a datetime with a time zone value, the value returned is in UTC. For a listing of time zone region names and their corresponding abbreviations, query the V$TIMEZONE_NAMES dynamic performance view. 1. 获取当前日期中的年份 SQL> select extract(year from sysdate) as "year"...
EXTRACT(component FROM datetime): 提取日期/时间的特定部分(如YEAR、MONTH、DAY等)。 【示意图】 【示例】 我想获取2024-04-29中的各个数据,则可以使用下面的方式 代码语言:javascript 代码运行次数:0 运行 AI代码解释 selectSYSDATE,EXTRACT(yearFROMTO_TIMESTAMP('2024-04-29 01:02:03','yyyy-mm-dd hh:mi...
SELECT EXTRACT(YEAR FROM datetime) AS year FROM mytable;SELECTDEBUG_EQUIPMENT_TREND AS 调试台设备利用率 ,SHAKING_EQUIPMENT_TREND AS 震动台设备设备利用率 ,STICKERS_EQUIPMENT_TREND AS 电装标贴设备利用率,DEBUG_EQUIPMENT_FAILURERATE AS 调试台故障率,SHAKING_EQUIPMENT_FAILURERATE AS 震动台故障率,STICKER...
EXTRACT extracts and returns the value of a specified datetime field from a datetime or interval value expression. When you extract a TIMEZONE_REGION orTIMEZONE_ABBR (abbreviation), the value returned is a string containing the appropriate time zone na...
Oracle里的时间类型分两大类 —— Datetime 和 Interval Data Types,本文主要关注第一类Datetime。 Datetime又可以分为四类,其中与时区有关的是后两类: DATE TIMESTAMP TIMESTAMP WITH TIME ZONE TIMESTAMP WITH LOCAL TIME ZONE 1. DATE 存储日期+时间,精确到秒,不存储时区和地区信息。输出格式和语言由 NLS_DAT...
extract(datetime)函数 从给定的datetime中得到年、月、日、时、分、秒 SQL> select sysdate "date", 2 extract(year from sysdate)"year", 3 extract(month from sysdate)"month", 4 extract(day from sysdate)"day", 5 extract(hour from systimestamp)"hour", 6 extract(minute from systimestamp)"minu...
从Python 2.4 版开始,cx_Oracle 自身可以处理 DATE 和 TIMESTAMP 数据类型,将这些列的值映射到 Python 的 datetime 模块的 datetime 对象中。因为 datetime 对象支持原位的运算操作,这可以带来某些优势。内置的时区支持和若干专用模块使 Python 成为一台实时机器。由于有了 cx_Oracle 的映射机制,Python 和 Oracle 间...
获得小时数 extract()找出日期或间隔值的字段值 SELECT EXTRACT(HOUR FROM TIMESTAMP '2001-02-16 2:38:40') from offer SQL> select sysdate ,to_char(sysdate,'hh') from dual; SYSDATE TO_CHAR(SYSDATE,'HH') --- --- 2003-10-13 19:35:21 07 SQL> select sysdate ,to_char(sysdate,'hh24'...