有人写了一个SQL Server查询，我的工作是将它移植到Postgres。
除了最基本的SQL命令之外，我对任何一个数据库都不太了解（我正在学习教程，并将继续学习这两种方法，但我希望尽早解决这个问题）。
不管怎样，我得到的错误是在第4行，
错误：列为TimelGotoDay.不存在DeaLogyLogd
我认为这来自第89行（标记为**）附近的部分，但我无法确定语法应该是什么——我已经尝试从文档中复制with/AS部分，但要么我仍在犯错误，要么错误在其他地方。下面可能有很多重复的/无关的代码，但是我认为最好包含所有这些代码，因为当我更改到Postgres语法时，我可以很容易地引入其他错误。
编辑：
如果删除有问题的部分，则错误将更改为
错误：列TimelGoGeDaySaGoo.DATEYLoG不存在
下一批类似的代码是什么，这使我相信我在命名临时表时犯了一些语法错误（正确的术语？）但我不知道出了什么问题，很难在文档中找到相关的部分。。。搜索“With”或“As”并不奇怪，没有帮助。
SELECT users.author,
users.display_name,
timeloggedToday.date_logged "DATE_LOGGED_TODAY",
timeloggedToday.time_in_hours "TIME_IN_HOURS_TODAY",
timeloggedToday.difference_days "DIFFERENCE_DAYS_TODAY",
CASE
WHEN Ifnull(timeloggedToday.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timeloggedToday.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_TODAY",
timelogged1daysago.date_logged "DATE_LOGGED_1DAYSAGO",
timelogged1daysago.time_in_hours "TIME_IN_HOURS_1DAYSAGO",
timelogged1daysago.difference_days "DIFFERENCE_DAYS_1DAYSAGO",
CASE
WHEN Ifnull(timelogged1daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged1daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_1DAYSAGO",
timelogged2daysago.date_logged "DATE_LOGGED_2DAYSAGO",
timelogged2daysago.time_in_hours "TIME_IN_HOURS_2DAYSAGO",
timelogged2daysago.difference_days "DIFFERENCE_DAYS_2DAYSAGO",
CASE
WHEN Ifnull(timelogged2daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged2daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_2DAYSAGO",
timelogged3daysago.date_logged "DATE_LOGGED_3DAYSAGO",
timelogged3daysago.time_in_hours "TIME_IN_HOURS_3DAYSAGO",
timelogged3daysago.difference_days "DIFFERENCE_DAYS_3DAYSAGO",
CASE
WHEN Ifnull(timelogged3daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged3daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_3DAYSAGO",
timelogged4daysago.date_logged "DATE_LOGGED_4DAYSAGO",
timelogged4daysago.time_in_hours "TIME_IN_HOURS_4DAYSAGO",
timelogged4daysago.difference_days "DIFFERENCE_DAYS_4DAYSAGO",
CASE
WHEN Ifnull(timelogged4daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged4daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_4DAYSAGO",
timelogged5daysago.date_logged "DATE_LOGGED_5DAYSAGO",
timelogged5daysago.time_in_hours "TIME_IN_HOURS_5DAYSAGO",
timelogged5daysago.difference_days "DIFFERENCE_DAYS_5DAYSAGO",
CASE
WHEN Ifnull(timelogged5daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged5daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_5DAYSAGO",
timelogged6daysago.date_logged "DATE_LOGGED_6DAYSAGO",
timelogged6daysago.time_in_hours "TIME_IN_HOURS_6DAYSAGO",
timelogged6daysago.difference_days "DIFFERENCE_DAYS_6DAYSAGO",
CASE
WHEN Ifnull(timelogged6daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged6daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_6DAYSAGO",
timelogged7daysago.date_logged "DATE_LOGGED_7DAYSAGO",
timelogged7daysago.time_in_hours "TIME_IN_HOURS_7DAYSAGO",
timelogged7daysago.difference_days "DIFFERENCE_DAYS_7DAYSAGO",
CASE
WHEN Ifnull(timelogged7daysago.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timelogged7daysago.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_7DAYSAGO",
lastReportedTime.last_time_logged
FROM
(SELECT lower_child_name AS "author",
cwd_user.display_name
FROM cwd_membership
LEFT JOIN cwd_user ON (cwd_membership.lower_child_name = cwd_user.user_name
AND cwd_user.directory_id = cwd_membership.directory_id)
WHERE lower_parent_name = 'jira-developers'
AND cwd_membership.directory_id = 10100) users
**LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '0 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timeloggedToday ON timeloggedToday.lower_user_name = users.author**
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-1 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged1daysago ON timelogged1daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-2 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged2daysago ON timelogged2daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-3 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged3daysago ON timelogged3daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-4 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged4daysago ON timelogged4daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-5 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged5daysago ON timelogged5daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-6 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged6daysago ON timelogged6daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '-7 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timelogged7daysago ON timelogged7daysago.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
Max(startdate) AS "last_time_logged"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
GROUP BY app_user.lower_user_name) lastReportedTime ON lastReportedTime.lower_user_name = users.author
编辑：更简单的查询
我想我已经删掉了一些无关的东西，希望能找到这个错误。无论如何，这个较短的查询至少会给我同样的错误，所以这可能更容易帮助我调试：
SELECT users.author,
users.display_name,
timeloggedToday.date_logged "DATE_LOGGED_TODAY",
timeloggedToday.time_in_hours "TIME_IN_HOURS_TODAY",
timeloggedToday.difference_days "DIFFERENCE_DAYS_TODAY",
CASE
WHEN Ifnull(timeloggedToday.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timeloggedToday.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_TODAY",
lastReportedTime.last_time_logged
FROM
(SELECT lower_child_name AS "author",
cwd_user.display_name
FROM cwd_membership
LEFT JOIN cwd_user ON (cwd_membership.lower_child_name = cwd_user.user_name
AND cwd_user.directory_id = cwd_membership.directory_id)
WHERE lower_parent_name = 'jira-developers'
AND cwd_membership.directory_id = 10100) users
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
AND startdate - Now() = INTERVAL '0 days'
GROUP BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now()),
worklog.startdate
ORDER BY app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d'),
Date(Now())) timeloggedToday ON timeloggedToday.lower_user_name = users.author
LEFT JOIN
(SELECT app_user.lower_user_name,
Max(startdate) AS "last_time_logged"
FROM worklog
LEFT JOIN app_user ON worklog.author = app_user.user_key
GROUP BY app_user.lower_user_name) lastReportedTime ON lastReportedTime.lower_user_name = users.author
最佳答案
编辑：
引用的大写字母使查询失败。在下面第二个失败的输出中，您可以看到Postgres不喜欢大写。它有一个小写的habbit，除非您强制使用"引号。
--fails
select a
from
(select 1 as "A") as t;
--fails
select A
from
(select 1 as "A") as t;
--works
select "A"
from
(select 1 as "A") as t;
psql:new.sql:5: ERROR: column "a" does not exist
LINE 1: select a
^
psql:new.sql:10: ERROR: column "a" does not exist
LINE 1: select A
^
A
───
1
(1 row)
select ...
timeloggedToday.date_logged "DATE_LOGGED_TODAY",
-- should be: timeloggedToday."DATE_LOGGED" "DATE_LOGGED_TODAY",
...
LEFT JOIN
(SELECT app_user.lower_user_name,
to_char(startdate, '%Y-%m-%d') AS "DATE_LOGGED",
Sum(timeworked) / 3600 "TIME_IN_HOURS",
startdate - Now() "DIFFERENCE_DAYS"
...
) timeloggedToday ON timeloggedToday.lower_user_name = users.author;
我会考虑去掉大写和引号。只会引起头痛。作为补充说明，您可以只通过以下方式编写左连接：
-- instead of enumerating each possible interval
WHERE to_char(Now() - INTERVAL '8 days', '%Y-%m-%d') < to_char(startdate, '%Y-%m-%d')
-- select the interval
now()::date - start_date as diff
-- then build up your columns like:
case(case when diff=0 then date_logged else null end) as date_logged_today
case(case when diff=1 then date_logged else null end) as date_logged_yesterday
-- and so on ...
你也可以
CASE
WHEN Ifnull(timeloggedToday.time_in_hours, 0) = 0 THEN 'No Time Logged'
WHEN timeloggedToday.time_in_hours < 3.0 THEN 'User has not logged sufficient time'
ELSE 'user has logged sufficient time'
END "STATUS_TODAY",
变成一个函数来摆脱繁琐的冗余。
关于sql - Postgres列不存在，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/25814856/