Postgresql 如何返回周数+年数+星期五周数

在sql中，它如下所示：

select to_char(d,'WW')    as Week
     , to_char(d,'YYYY')  as Year
     , to_char(d,'DD')    as "Day of Friday"
     , d
from (
      select (level-1)*7 + to_date('02/01/2015','DD/MM/YYYY') d
        from dual
      connect by level <= 53*5);

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但是我需要一个Postgres脚本…

你一年前试过吗？看看

Postgres的日期时间掩码几乎是一样的。在你的情况下，我想他们是平等的：

select to_char(d,'WW')    as Week
     , to_char(d,'YYYY')  as Year
     , to_char(d,'DD')    as "Day of Friday"
     , d
from to_date('02/01/2015','DD/MM/YYYY') d

给出：

01；2015;12;2015-01-12

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除非本周不是第一天，周五也不是一个月的某一天……

谢谢您的回复

这就是我想要的：

SELECT 
     extract('week' from d) as "Week"
    ,extract('year' from d) as "Year"
    ,extract('day' from d)  as "Friday Number"
FROM generate_series('2015-01-02'::date, '2015-12-31'::date, '1 week'::interval) d

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您需要编写脚本的所有内容都在中。