start 大于stop,step 是负数 david=# select generate_series(5,1,-1); generate_series --- 5 4 3 2 1 (5 rows) david=# 3.2) 时间类型 david=# select generate_series(now(), now() + '7 days', '1 day'); generate_series --- 2013-04-03 14:22:26.391852+08 2013-04-04 14:22:26....
-- 生成过去 10 天的日期序列 WITH date_series AS ( SELECT to_char(generate_series(CURRENT_DATE - INTERVAL '10 days', CURRENT_DATE, '1 day'), 'yyyy-mm-dd') AS date ), -- 获取符合条件的 data_table 数据 filtered_data_table AS ( SELECT id, name, date_series.date FROM data_table ...
select date(day) as day from generate_series('2020-05-22'::timestamp, current_date, '1 day'::interval) as day ``` ### Hive实现指定指定开始结束日期的日期序列 在Hive中,可以借助 posexplode(list)、datediff(end_date, start_date)来实现。 首先创建一个表名为calender,字段为day,类型为date,存...
generate_series ( start integer, stop integer [, step integer ] ) → setof integer generate_series ( start bigint, stop bigint [, step bigint ] ) → setof bigint generate_series ( start numeric, stop numeric [, step numeric ] ) → setof numeric generate_series ( start timestamp, ...
t_girl=# insert into test_series select seq, current_date - '1 day'::interval*seq from generate_series(1,20) as g(seq);INSERT020t_girl=# select * from test_series;id|log_date---+---1|2014-03-022|2014-03-013|2014-02-284|2014-02-275|2014-02-266|2014-02-257|2014-02-248...
select to_char(t,'yyyy-MM') as day from generate_series(current_date - interval '12 month' ,now(), '1 months') as t; 图片.png 获取进30天所有日期 select to_char(t,'yyyy-MM-DD') as day from generate_series(current_date - interval '30 day' ,now(), '1 days') as t order...
在PostgreSQL 和 Hive中生成日期序列 Postgresql实现日期序列 在postgresql中，有 generate_series(start_date, end_date, interval)函数来生成日期序列 ```select date(day) as day from generate_series('2020-05-22'::timestamp, current_date, '1 day'::interval) as day ```Hive实现指定指定...
上述SQL语句中的generate_series函数用于生成指定范围内的连续日期序列。 现在,表中的日期列将包含从2022年1月1日到2022年1月31日之间的所有日期。 PostgreSQL的优势在于其稳定性、可靠性和扩展性。它具有强大的功能和丰富的数据类型支持,适用于各种应用场景,包括Web应用程序、企业级应用程序和大数据分析等。 腾讯云提供...
PostgreSQL的generate_series（）函数的用法说明 PostgreSQL的generate_series（）函数的⽤法说明我就废话不多说了，⼤家还是直接看代码吧~SELECT generate_series(1,12) AS month;SELECT generate_series(1,12,1) AS month;SELECT generate_series(‘2020-01-01'::DATE,‘2020-12-31'::DATE,‘1 month'::...
generate_series function. In essence, it does not accord for the day of the month correctly. I have many different frequencies (provided by the user) that need to be calculated between a given start and end date. The start date can be any date and thus any day of the month. This ...