Converting PostgreSQL interval to string To convert an interval value to a string, you use the TO_CHAR() function. TO_CHAR(interval,format) The TO_CHAR() function takes the first argument as an interval value, the second one as the format, and returns a string that represents the interval...
test=#selectinterval'1 year 2 months 3 days 4 hours 5 minutes 6 seconds'; interval---1year2mons3days04:05:06(1row) test=#selectinterval'2 year 2 months 3 days 4 hours 5 minutes 6 seconds'; interval---2years2mons3days04:05:06(1row) test=#selectinterval'2 year 2 month 3 day ...
date_part(text, interval) double precision 获取interval时间类型中的指定的年月日时分秒等,text的值包括了year(简写 y ),month(m),day(d),hour(h),minute(m),second(s) select date_part(‘hour’,interval ‘2 years 3 months 12 days 10 hours 30 minutes 10 seconds’); 10 date_trunc(text, ti...
6 seconds 可以⽤单词复数，也可以不⽤ test=# select interval '1 year 2 months 3 days 4 hours 5 minutes 6 seconds';interval --- 1year2 mons 3 days 04:05:06 (1 row)test=# select interval '2 year 2 months 3 days 4 hours 5 minutes 6 seconds';interval --- 2 years 2 mons 3...
-- (For greater precision, we would use tde day-to-second interval) i1 INTERVAL YEAR TO MONtd := INTERVAL '3-2' YEAR TO MONtd ; -- Five days, four hours, tdree minutes, two and 1/100 seconds i2 INTERVAL DAY TO SECOND := INTERVAL '5 04:03:02.01' DAY TO SECOND ; ...
' seconds...' ); end; to_char() function The following are number examples for theto_charfunction. The following is a list of valid parameters when theto_charfunction is used to convert a date to a string. These parameters can be used in many combinations. ...
to_char(..., 'ID')的一周中日的编号匹配extract(isodow from ...)函数,但是to_char(..., 'D')不匹配extract(dow from ...)的日编号。 to_char(interval)格式化HH和HH12为显示在一个 12 小时的时钟上,即零小时和 36 小时输出为12,而HH24会输出完整的小时值,对于间隔它可以超过 23. ...
前期,我参与了公司开发的数据库数据迁移工具的工作,以及之前的对Page的分析记录,在此进一步将数据库的数据类型做一下分析记录。 一、数据库系统表pg_type PostgreSQL的所有数据类型都存储在系统表pg_type中。 pg_type的表结构如下(这里是从源码中进行介绍的,源码可以点击pg_type.h): ...
Case 1: we are switching fromAustralia/Sydneytime toAsia/Tokyotime, which is 2 hours behind. This involves moving from 10am to 8am, but underneath removing the UTC time zone offset to the absolute “TIMESTAMP” value of 8am. Case 2: we have a TIMESTAMP which we wish to convert to Syd...
Interval TimeSpan String Boolean Boolean Boolean Point String String Line String String Iseg String String Box String String Path String String Polygon String String Circle String String Cidr String String Inet String String Macaddr String String Macaddr8 String String Tsvector String String Tsquery Stri...