selectclock_timestamp();-- 带时区 2. 格式转换 -- select to_timestamp(double precision) selectto_timestamp(1663740005);-- unix时间戳转时间 selectdate(to_timestamp(1663743934638::numeric/1000));-- 时间保留到天 selectdate(localtimestamp); -- select to_date(text, text) selectto_date('05 D...
PostgreSQL官方说明:http://www.postgresql.org/docs/9.2/static/functions-datetime.html
##No need to import arcpy if you are running functions in the same Python window. import arcpyarcpy.ListUsers("c:\\temp\pgdb.sde") 返回用户连接的列表。 [user(ClientName=u'PC4', ConnectionTime=datetime.datetime(2018, 10, 18, 8, 30, 19), ID=18, IsDirecConnection=True, Name=u...
摘自: https://www.postgresql.org/docs/current/functions-datetime.html#FUNCTIONS-DATETIME-CURRENT 9.9.4. Current Date/Time PostgreSQL provides a number of functions that return values related to the current date and time. These SQL-standard functions all return values based on the start time of t...
CREATE PARTITION FUNCTION DailyPF (DATETIME2(0)) AS RANGE RIGHT FOR VALUES (@StartDay, DATEADD(dd,1,@StartDay), DATEADD(dd,2,@StartDay), DATEADD(dd,3,@StartDay), DATEADD(dd,4,@StartDay) ); GO 1. 2. 3. 4. 5. 6. 7.
backtrace_functions | {NOT_IN_SAMPLE} block_size | {NOT_IN_SAMPLE} data_checksums | {NOT_IN_SAMPLE,RUNTIME_COMPUTED} data_directory_mode | {NOT_IN_SAMPLE,RUNTIME_COMPUTED} debug_assertions | {NOT_IN_SAMPLE} debug_discard_caches | {NOT_IN_SAMPLE} ...
https://www.postgresql.org/docs/11/static/functions-datetime.html src/backend/utils/adt/timestamp.c 参考 https://docs.aws.amazon.com/zh_cn/redshift/latest/dg/r_DATEDIFF_function.html https://www.postgresql.org/docs/11/static/functions-datetime.html ...
datetime DATE、TIMESTAMP、INTERVAL等时间数据类型。 返回类型 char为TIMEZONE_REGION或者TIMEZONE_ABBR时,返回VARCHAR2数据类型。 char为其他字符串时,返回NUMBER数据类型。 示例 SELECT TZ_OFFSET('pst8pdt') FROM DUAL; tz_offset --- -07:00 SELECT TZ_OFFSET(SESSIONTIMEZONE) FROM DUAL; tz_offset --- ...
privateclassPersonType{publicstringFirstName{get;set;}publicstringLastName{get;set;}publicDateTimeBirthDate{get;set;}} A hint: Npgsql always converts the property name to a snake case column name, soFirstNameis mapped tofirst_nameby convention. You can use the[PgName]attribute to explicitly se...
CAST(x, AS type)函数将一个类型的值转换为另一个类型的值。 使用CAST函数进行数据类型的转换,将整数类型100转成两位字符串的类型10,SQL语句如下: SELECT CAST(100 AS CHAR(2)); 常见问题及解答 疑问1:如何从日期时间值中获取年、月、日等部分日期或时间值?