d1 日期型(date)/日期时间型(timestamp) c1 为字符型(参数) 返回值 字符 示例 (1)使用 extract 函数提取指定日期中的年月日时分秒,如下: SQL> select 2 extract(hour from timestamp '2022-05-07 23:24:30') 小时, 3 extract(minute from timestamp '2022-05-07 23:24:30') 分钟, 4 extract(sec...
从timestamp中获取年月日时分秒 selectextract(yearfromsystimestamp)year,extract(monthfromsystimestamp)month,extract(dayfromsystimestamp)day,extract(minutefromsystimestamp) minute ,extract(secondfromsystimestamp) second ,extract(timezone_hourfromsystimestamp) th ,extract(timezone_minutefromsystimestamp) ...
在Oracle数据库中,EXTRACT函数用于从日期或时间戳值中提取特定的日期或时间部分。关于EXTRACT函数返回值的类型,以下是详细解答: 1. EXTRACT函数的基本用法 EXTRACT函数的基本语法如下: sql EXTRACT(field FROM source) field:指定要提取的日期或时间部分,如YEAR、MONTH、DAY、HOUR等。 source:日期或时间戳表达式,从中...
select extract(hour from systimestamp) hour from dual; select extract(minute from systimestamp) minute from dual; select extract(second from systimestamp) second from dual; 其中,获取year month day 时,可以使用date或timestamp类型的值;获取hour minut second时,必须使用timestamp类型的值。 下面参考:h...
SELECT EXTRACT(MONTH FROM SYSDATE) FROM DUAL; //return Current Month SELECT EXTRACT(DAY FROM SYSDATE) FROM DUAL; //return Current Day SELECT EXTRACT(HOUR FROM SYSDATE) FROM DUAL;//Error SELECT EXTRACT(HOUR FROM TIMESTAMP '2005-10-10 10:10:10') FROM DUAL;// Correct SELECT ...
oracle的抽取函数是 extrac() 语法: SELECT EXTRACT(YEAR FROM SYSDATE) FROM DUAL; return Current Year SELECT EXTRACT(MONTH FROM SYSDATE) FROM DUAL; return Current Month SELECT EXTRACT(DAY FROM SYSDATE) FROM DUAL; return Current Day SELECT EXTRACT(HOUR FROM TIMESTAMP '2010-10-10 10:10:10') FR...
Extracting hours from a timestamp: SELECTEXTRACT(HOURFROMTIMESTAMP'1999-12-31 23:59:59.10')FROMdual;Code language:SQL (Structured Query Language)(sql) Result Extracting minutes from a timestamp: SELECTEXTRACT(MINUTEFROMTIMESTAMP'1999-12-31 23:59:59.10')FROMdual;Code language:SQL (Structured Que...
[sql] SELECT EXTRACT (HOUR FROM (CURRENT_TIMESTAMP – MAX (stuff))) FROM times; — stuff is a column in table times that contains a timestamp value — CURRENT_TIMESTAMP is an Oracle function (<a href="http://download.oracle.com/docs/cd/B14156_01/doc/B13812/html/sqfunc.htm#i100759...
oracle中的extract(hour from systimestamp) from dual;结果是? 和extract(hour from systimestamp) from dual ;的结果? 答案 应该是时区 东8区 返回 8 相关推荐 1 oracle中的extract(hour from systimestamp) from dual;结果是? 和extract(hour from systimestamp) from dual ;的结果? 反馈 收藏 ...
oracle函数extract(c1 from d1) 【功能】:日期/时间d1中,参数(c1)的值【参数】:d1日期型(date)/日期时间型(timestamp),c1为字符型(参数) 【参数表】:c1对应的参数表详见示例 【返回】:字符 【示例】 select extract(hour from timestamp '2001-2-16 2:38 日期时间 当前日期 oracle函数 转载 mob...