current_timetime with time zone当前时间select current_time;15:15:56.394651-07 current_timestamptimestamp with time zone当前时间戳select current_timestamp;2016-07-08 15:16:50.485864-07 date_part(text,timestamp)double precision获取时间戳中的某个子域,其中text可以为year,month,day,hour,minute,second等...
current_time(integer) →time with time zone 一天中的当前时间;有限精度 current_time(2)→14:39:53.66-05 current_timestamp→timestamp with time zone 当前日期和时间(当前事务的开始) current_timestamp→2019-12-23 14:39:53.662522-05 current_timestamp(integer) →timestamp with time zone 当前日期和...
clock_timestamp() timestamp with time zone 当前时间戳(语句执行时变化) select clock_timestamp(); 2016-07-08 15:14:04.197732-07 current_date date 当前日期 select current_date; 2016-07-08 current_time time with time zone 当前时间 select current_time; 15:15:56.394651-07 current_timestamp tim...
是一个 timestamp without time zone,而 TIMESTAMP '2021-03-06 18:02:00 +08' 1. 是一个 timestamp with time zone。 +08:表示 时区与全球统一时间 UTC 偏移量为 8 小时 AT TIME ZONE 构造允许把时间戳转换成不同的时区与timezone(zone,timestamp) 函数等效 SELECT current_timestamp AT TIME ZONE '...
clock_timestamp()timestamp with time zone当前时间戳(语句执行时变化)select clock_timestamp();2016-07-08 15:14:04.197732-07 current_datedate当前日期select current_date;2016-07-08 current_timetime with time zone当前时间select current_time;15:15:56.394651-07 ...
Example 1: How to Get Today’s DateTime Via LOCALTIMESTAMP? To get the current date and time, you must use the LOCALTIMESTAMP function with the collaboration of the Postgres SELECT command: SELECT LOCALTIMESTAMP; The output retrieves the current DateTime without a time zone. ...
A new record without a time zone information has been inserted into the “emp_joining_date” column. Example 3: Inserting DateTime Values Via Different Built-in Functions In Postgres, the functions likeNOW(),CURRENT_TIMESTAMP,TRANSACTION_TIMESTAMP(), etc., retrieve the current date and time wi...
类型`time with time zone`是 SQL 标准定义的,但是该定义显示出了一些会影响可用性的性质。在大多数情况下, `date`、`time`、`timestamp without time zone`和`timestamp with time zone`的组合就应该能提供任何应用所需的全范围的日期/时间功能。 ### 1. 日期/时间输入 日期和时间的输入可以接受几乎任何...
TIME [(p)][WITHOUT TIMEZONE] TIMESTAMP [(p)]WITHOUT TIMEZONE TIMESTAMP [(p)][WITHOUT TIMEZONE] CHAR(n),CHARACTER(n),VARCHAR(n),CHARACTER ,VARYING(n),TEXT STRING BYTEA BYTES 写入 内部类型 PostgreSQL 类型 TINYINT - SMALLINT SMALLINT,INT2,SMALLSERIAL,SERIAL2 ...
timestamp --- 2016-01-11 17:43:50 (1 row) 4、使用cast函数做类型转换去掉时区 test=# select cast(current_timestamp(0) as timestamp without time zone); timestamp --- 2016-01-11 17:44:10 (1 row) 三、标准格式 1)日期输入格式 January 8, 1999...