1.4.TO_TIMESTAMP: 功能:将字符串转换为时间戳变量,使用方法与TO_DATE相似。 1.5 CAST(value AS type): 功能:将一个变量值转换为第二个参数的类型 例如:select cast('03-4月-2008' as DATE) FROM DUAL; 2.日期函数: 2.1 ADD_MONTHS(a_date DATE,a_number NUMBER): 将当前的日期a_date增加a_number个...
select to_number(to_char(last_day(sysdate), 'dd')) into v_days from dual; end; i := 1; begin select last_day(add_months(sysdate, -1)) into v_date from dual; while i <= v_days loop insert into hkb_date values(v_date + i, to_char(v_date + i, 'yyyymmdd'),to_number(to...
v_curr_limit1=to_char(to_date(v_curr_limit,'yyyy-mm-dd')+interval'1 year','yyyy-mm-dd'); v_partition_name=to_char(to_date(v_curr_limit,'yyyy-mm-dd'),'yyyy');SELECTcount(1)intov_cntfrompg_tableswhereschemaname=v_schema_nameandtablename=v_table_name||'_'||v_partition_name;...
date_trunc($2, $1 + interval '12 hour') INTO r; ELSIF $2 = 'week' THEN SELECT date_trunc($2, $1 + interval '84 hour') INTO r; ELSIF $2 = 'month' THEN SELECT date_trunc($2, $1 + interval '15 day') INTO r; ELSIF $2 = 'year' THEN SELECT date_trunc($2, $1 + ...
mysql:mysql中时间相关的类型有日期date、时间time以及datetime、timestamp和year类型。 pg:pg中的时间数据类型基本和mysql一致。区别在于pg中支持timez类型,即带时区的时间类型,这个mysql中不支持,但是pg中不支持mysql中的year类型,不过我们仍然可以通过创建domain的方式来在pg中实现year类型。
Oracle中的to_date返回的是时间类型,而在PostgreSQL中to_date是日期类型,所以Oracle中的to_date在PostgreSQL中应该对应to_timestamp。 trunc(arg1, [arg2]) 在Oracle中trunc函数有两种用法。 第一种是对数字进行截取, trunc(num,[int]); 是去掉数字num小数位以后的部分,并且不进行四舍五入。这种用法和在PostgreSQ...
y Year M Month w Week d Day h Hour m Minute s Second ms Millisecond Database user permissions Important The database user that you specify when you add the data source should only be granted SELECT permissions on the specified database and tables you want to query. Grafana does not vali...
DateArray String String Range String String Bpchar String String Lookup activity properties To learn details about the properties, check Lookup activity. Upgrade the PostgreSQL connector Here are steps that help you upgrade your PostgreSQL connector: Create a new PostgreSQL linked service and configure ...
current_date→ date当前日期 current_date→ 2019-12-23 current_time→ time with time zone一天中的当前时间 current_time→ 14:39:53.662522-05 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 ...
CREATE TABLE rank (id int, rank int, year int, gender char(1), count int ) DISTRIBUTED BY (id) PARTITION BY LIST (gender) ( PARTITION girls VALUES ('F'), PARTITION boys VALUES ('M'), DEFAULT PARTITION other ); 创建多级分区表 支持创建多级的分区表。下述建表语句创建了具有三级表分区的...