PostgreSQL实现按年、月、日、周、时、分、秒的分组统计
作者：小旭2021
这篇文章介绍了PostgreSQL实现按年、月、日、周、时、分、秒分组统计的方法，文中通过示例代码介绍的非常详细。对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
按年查询
select to_char(date::DATE, 'YYYY') as year,sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by year order by year
按月查询
select to_char(date::DATE, 'YYYY-MM') as month,sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by month order by month
按周查询
select to_char(date::DATE-(extract(dow from date::TIMESTAMP)-1||'day')::interval, 'YYYY-mm-dd') week, sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by week order by week
按天查询
select to_char(date::DATE, 'YYYY-MM-DD') as day,sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by day order by day
按小时查询
select to_char(date::DATE, 'YYYY-MM-DD HH24') as hour,sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by hour order by hour
按分钟查询
select to_char(date::DATE, 'YYYY-MM-DD HH24:MI ') as minute,sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by minute order by minute
按秒查询
select to_char(date::DATE, 'YYYY-MM-DD HH24:MI:SS ') as second,sum(shares) as shares, sum(visits) as visits from database_table where date >= '2019-01-01' and date <= '2020-01-01' group by second order by second
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。