在PostgreSQL 中,如果您从另一个中减去一个日期时间值(TIMESTAMP,DATE 或 TIME 数据类型),则将获得一个 INTERVAL 值,格式为“ddddayshh:mi:ss”。 SELECT '2011-12-31 01:00:00'::timestamp - '2011-12-29 23:00:00'::timestamp; -- Result: "1 day 02:00:00" SELECT '2011-12-31 01:00:00...
minus (-) TIMESTAMP '2001-09-28 13:30:00' - 3 25-SEP-01 13:30:00 minus (-) TIMESTAMP '2001-09-29 03:00:00' - TIMESTAMP '2001-09-27 12:00:00' @ 1 day 15 hours Overview of date and time functions In the date/time functions of the following table...
Make to_char()'s localized month/day names depend on LC_TIME, not LC_MESSAGES (Euler Taveira de Oliveira) 现在 to_char() 的月/日本地化显示依赖于 LC_TIME ,而不是 LC_MESSAGES。 Cause to_date() and to_timestamp() to more consistently report errors for invalid input (Brendan Jurd) to...
If you want to get end of day, you may try to convert it to `begin of next day minus 1 second`. select date_trunc('day', now()) + interval '7 day' - interval '1 sec'; This may not be accurate considering about time like `23:59:59.999`. Then you can change your query a ...
timestamp interval date decimal numeric To use a data type supplied bypgtypeslib, you must#includethe proper header file. Type codes The following table contains the type codes forexternaldata types. An external data type is used to indicate the type of a C host variable. When an application...
In last articleFinding Contiguous primary keyswe detailed one of many ways of finding continuous ranges in data, but the approach would only work on higher-end dbs like Oracle 11G, SQL Server 2012, and PostgreSQL 8.4+. Oracle you'd have to replace the EXCEPT I think with MINUS. It wouldn...
WWWeek number of year (1-53); the first week starts on the first day of the year IWISO week number of year; the first Thursday of the new year is in week 1 CCCentury (2 digits); the 21st century starts on 2001-01-01 SCCSame as CC except BC dates are pre...
timestamp interval date decimal numeric To use a data type supplied bypgtypeslib, you must#includethe proper header file. Type Codes The following table contains the type codes forexternaldata types. An external data type is used to indicate the type of a C host variable. When an application...
Format patterns that result in a non-immutable function include any variations of spelled out or abbreviated months(MONTH, MON), days(DAY, DY), median indicators(AM, PM), or era indicators(BC, AD). For the following example, a table with aTIMESTAMPcolumn i...