{caseDTK_DATE:break;caseDTK_CURRENT:ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),errmsg("date/time value \"current\" is no longer supported")));GetCurrentDateTime(tm);break;caseDTK_EPOCH:GetEpochTime(tm);break;caseDTK_LATE:DATE_NOEND(date);PG_RETURN_DATEADT(date);caseDTK_EARLY...
datetime 占8字节,精度3.33ms 日期范围1753年1月1日到9999年12月31日 smalldatetime 占4字节,精度1ms,日期范围1900年1月1日到2079年6月6日 日期和时间常量在SQL中用引号分隔符分隔。Set DateOfBirth='2/21/1983 10:10 AM' 整数 int smallint tinyint bigint bit逻辑真或逻辑假 近似数字(近似计算) 避免使...
您如何实际执行datetime操作,如添加日期、查找差异、找出一个间隔中不包括周末的天数?我个人开始将其中的一些操作传递给我的postgresql dbms,因为通常我只需要发出一条sql语句来获得答案,然而,要以PHP的方式完成这项工作,我必须编写更多的代码,这意味着发生错误的可能性更大…… PHP中有没有以不需要大量代码的方式执行...
If you runSELECT current_timestamp;in thecommand line– so directly on your server -, you’ll get the current datetime in yourserver’s time zone. (Quite often, it’s GMT by default.) But if you runSELECT current_timestamp;in yourSQL manager tool(e.g. in SQL workbench), you’ll g...
start_date = get_next_month_first_day(d1) # Gets the 1st of the next two months as the end value of the partitioned table end_date = get_next_month_first_day(d2) # get sub table name getmonth = datetime.datetime.strftime(d2, '%Y_%m') ...
In the above snippet, the NOW() function is first used to get the current DateTime. After that, an interval “1 Month, 2 Days and 3 Hours” is added to the current DateTime using the “+” operator: The output shows the current DateTime and current DateTime after 1 month, 2 days, ...
end_date = get_next_month_first_day(d2) # get sub table name getmonth = datetime.datetime.strftime(d2, '%Y_%m') sub_table = table + '_' + getmonth create_table(db, table, sub_table, start_date, end_date) if __name__ == '__main__': create_sub_table('test', 'tbl_game...
-- MySQLSELECTNOW();-- PostgreSQLSELECTCURRENT_TIMESTAMP;SELECTCURRENT_DATE; 3. 日期时间的增减 MySQL使用DATE_ADD()和DATE_SUB()等函数来添加或减少日期时间,而PostgreSQL则使用INTERVAL。例如: 代码语言:sql AI代码解释 -- MySQLSELECTDATE_ADD(NOW(),INTERVAL1DAY);SELECTDATE_SUB(NOW(),INTERVAL1DAY);...
A. Current_date:获取当前的日期 SELECT CURRENT_DATE; Result:2001-12-23 B. Current_time:获取当前时间 SELECT CURRENT_TIME; Result: 14:39:53.662522-05 C. Current_tiestamp:获取当前日期和时间,开始于当前的事务 SELECT CURRENT_TIMESTAMP; Result:2001-12-23 14:39:53.662522-05 ...
https://www.postgresql.org/docs/16/functions-datetime.html#FUNCTIONS-DATETIME-ZONECONVERT 3)数据库配置: TimeZone (string) Sets the time zone for displaying and interpreting time stamps. The built-in default is GMT, but that is typically overridden in postgresql.conf; initdb will install a setti...