Python psql被拆分为相应的列

在确定哪一天的状态错误超过1%时，我遇到了一些麻烦，如下表所示：

 path   | text                     |
 ip     | inet                     |
 method | text                     |
 status | text                     |
 time   | timestamp with time zone | default now()
 id     | integer                  | not null default nextval('log_id_seq'::regclass)
Indexes:
    "log_pkey" PRIMARY KEY, btree (id)

重要的部分是状态，它要么是200 OK，要么是一个错误，时间就是日期，其余的部分对于这个特殊的问题我相信是没用的

这是我到目前为止的代码：

def heavy_error_days():
    db = psycopg2.connect("dbname=news")
    c = db.cursor()
    c.execute("select date(log.time), errors\
     from log, (select count(status)::numeric/(select count(status)\
     from log)from log where status <> '200 OK'\
     and date(log.time) = date(log.time)) as errors\
     group by date, errors")
    print c.fetchone()

我相信我需要做的是把错误乘以100，然后把它们分成各自的日期，但我不知道怎么写

如果有人能帮我，我将非常感激

错误

我注意到时间是用双引号括起来的，这可能是问题所在，所以我将其改为单引号，并得到以下错误：

Traceback (most recent call last):
  File "news.py", line 41, in <module>
    heavy_error_days()
  File "news.py", line 33, in heavy_error_days
    c.execute("with a as (select distinct (sum(case when status <> '200 OK' then 1 else 0 end) over w * 100) / count(1) over w perc, 'time'::date d from log window w as (partition by 'time'::date))select * from a where perc > 1")
psycopg2.DataError: invalid input syntax for type date: "time"
LINE 1: ...else 0 end) over w * 100) / count(1) over w perc, 'time'::da...
                                                             ^

---

此查询应实现以下功能：

with a as (
  select distinct (sum(case when status <> '200 OK' then 1 else 0 end) over w * 100) / count(1) over w perc, "time"::date d
  from log
  window w as (partition by "time"::date)
)
select *
from a
where perc > 1

查询：

t=# with a as (
  select distinct (sum(case when status <> '200 OK' then 1 else 0 end) over w * 100) / count(1) over w perc, "time"::date d
  from log
  window w as (partition by "time"::date)
)
select *
from a
where perc >= 0
;
 perc |     d
------+------------
    0 | 2017-05-17
   33 | 2017-05-19
(2 rows)

---

当我尝试执行这个查询时，它告诉我上一次在python上使用psycopg运行它时出现了语法错误，我将用这个错误更新我的帖子，这样会更好formatted@DanielCampos我检查了错误-您必须转义双引号才能\time \-仅将双引号更改为单引号会更改整个查询。“时间”是文字，时间是标识符——它不仅仅是任何引号

t=# create table log("time" timestamptz, status text);
CREATE TABLE
t=# insert into log values (now(),'200 OK'),(now(),'200 OK'),(now(),'ERR'),(now()-'2 days'::interval,'200 OK');
INSERT 0 4

t=# with a as (
  select distinct (sum(case when status <> '200 OK' then 1 else 0 end) over w * 100) / count(1) over w perc, "time"::date d
  from log
  window w as (partition by "time"::date)
)
select *
from a
where perc >= 0
;
 perc |     d
------+------------
    0 | 2017-05-17
   33 | 2017-05-19
(2 rows)