在MySQL中,可以使用DATE()函数从时间戳中提取日期部分。 sql SELECT DATE(timestamp_column) AS date_part FROM your_table; 2. PostgreSQL 在PostgreSQL中,可以使用::date类型转换或者DATE_TRUNC函数来提取日期。 sql -- 使用类型转换 SELECT timestamp_column::date AS date_part FROM your_table; -- 或者...
Currently I cannot see any way to do this, and even worse, I cannot use raw because each SQL dialect has a different way to extract the date from a timestamp. At least between sqlite3, mysql and mssql there is no common way to do this (maybe only between sqlite3 and mysql, but s...
Date: 22 September 2016, 07:08:34 On 09/21/2016 08:37 PM, Patrick B wrote: > Hi guys, > > I'm using postgres 9.2 and got the following column: > > start TIMESTAMP(6) WITHOUT TIME ZONE NOT NULL > > > SELECT start FROM test1; > > > 2015-12-18 02:40:00 > > I need...
datetime.fromtimestamp(timestamp[, tz]):根据时间戮创建一个datetime对象,参数tz指定时区信息; datetime.utcfromtimestamp(timestamp):根据时间戮创建一个datetime对象; datetime.combine(date, time):根据date和time,创建一个datetime对象; datetime.strptime(date_string, format):将格式字符串转换为datetime对象,data...
The Date, Time or Timestamp from which the information is required, is specified in factor 2, followed by the duration code. The entry specified in factor 2 can be a field, subfield, table element, or array element. The duration code must be consistent with the Data type of factor 2. ...
extract()函数:用于从一个date或者interval类型中截取到特定的部分 ### extract 语法 extract ( { year | month | day | hour | minute | second } | { timezone_hour | timezone_minute } | { timezone_region | timezone_abbr } from { date_value | interval_value } ) ...
GreenPlum学习笔记：date_part与extract提取⽇期时间、时间 差 GP可以使⽤date_part / extract从⽇期时间类型中抽取部分内容。⽅法⼀：extract 格式：extract(field from source) extract函数从⽇期、时间数值⾥抽取⼦域，例如年、⼩时等。 注意：source的类型type必须为：timestamp、time...
【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 2:38:40 ' ) 小时, extract(minute from timestamp '2001-2-16 2:38:40 ' ) 分钟, ...
int extract(<datepart> from date|datetime|timestamp <date>) 参数说明 datepart:必填。支持YEAR、MONTH、DAY、HOUR或MINUTE等时间取值。 date:必填。DATE、DATETIME、TIMESTAMP或STRING类型日期值,格式为yyyy-mm-dd、yyyy-mm-dd hh:mi:ss或yyyy-mm-dd hh:mi:ss.ff3。取值为STRING类型格式时,至少要包含yyyy-...
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...