0

问题：我需要根据 unitlog_table 上的 UnitNo 获取用户名。

这是我的查询：

select distinct(avh.UnitNo), 
    isnull((select count(UnitNo) from unitlog_table 
            where UnitNo = avh.UnitNo 
              and timestamp between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00' 
              and speed >= 41),0) as overord,
    isnull((select count(UnitNo) from unitlog_table 
            where UnitNo = avh.UnitNo 
              and timestamp between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00' 
              and speed >= 71),0) as overex ,
    isnull((select count(UnitNo) from unitlog_table 
            where UnitNo = avh.UnitNo 
              and timestamp between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00' 
              and speed >= 91),0) as overc,
    isnull((select count(UnitNo) from unitlog_table 
            where UnitNo = avh.UnitNo 
              and timestamp between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00' 
              and speed >= 41 and speed >= 71 and speed >= 91), 0) as ttover,
    (select distinct(username) 
     from unit_table av 
     inner join users_table ut on ut.UnitNo = av.UnitNo 
     where UnitNo = avh.UnitNo) as username
from 
    unitlog_table avh 
where 
    avh.UnitNo in (select UnitNo from unit_table where userid = '1122')  
    and timestamp between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00'

这是我的表 1 ( unitlog_table)：

UnitNo        timestamp           speed
----------------------------------------
 unit1   2021-09-01 07:36:21.00    7.72
 unit1   2021-09-01 07:36:30.00    9.58
 unit1   2021-09-01 07:37:16.00    7.2
 unit1   2021-09-01 07:37:37.00    18.32
 unit1   2021-09-01 07:38:18.00    1.85
 unit1   2021-09-01 07:38:27.00    13.32
 unit1   2021-09-01 07:38:45.00    12.94
 unit1   2021-09-01 07:47:39.00    8.34
 unit1   2021-09-01 07:48:07.00    30.04
 unit1   2021-09-01 07:48:24.00    31.825
 unit1   2021-09-01 07:49:06.00    30.26
 unit1   2021-09-01 07:49:24.00    33.875
 unit1   2021-09-01 07:49:33.00    33.54
 unit1   2021-09-01 07:50:21.00    37.235
 unit1   2021-09-01 07:50:43.00    15.22
 unit1   2021-09-01 07:50:51.00    13.435
 unit1   2021-09-01 07:51:24.00    17.03
 unit1   2021-09-01 07:52:17.00    16.915
 unit1   2021-09-01 07:52:33.00    18.435
 unit1   2021-09-01 07:52:54.00    16.805
 unit1   2021-09-01 07:53:15.00    76.225
 unit1   2021-09-01 07:53:29.00    24.375
 unit1   2021-09-01 07:54:21.00    29.925
 unit1   2021-09-01 07:55:14.00    17.39
 unit1   2021-09-01 07:55:29.00    22.975
 unit1   2021-09-01 07:56:19.00    8.015
 unit1   2021-09-01 07:56:28.00    42.68
 unit1   2021-09-01 07:56:57.00    24.33
 unit1   2021-09-01 07:57:16.00    33.575
 unit1   2021-09-01 07:57:25.00    13.215
 unit1   2021-09-01 07:57:39.00    31.245
 unit1   2021-09-01 07:58:16.00    90.705
 unit1   2021-09-01 07:58:31.00    58.665
 unit1   2021-09-01 07:58:47.00    44.06
 unit1   2021-09-01 07:59:16.00    40.32
 unit2   2021-09-01 07:57:25.00    13.215
 unit2   2021-09-01 07:57:39.00    31.245
 unit2   2021-09-01 07:58:16.00    60.705
 unit2   2021-09-01 07:58:31.00    58.665
 unit2   2021-09-01 07:58:47.00    44.06
 unit2   2021-09-01 07:59:16.00    40.32
 unit3   2021-09-01 07:57:25.00    43.215
 unit3   2021-09-01 07:57:39.00    71.245
 unit3   2021-09-01 07:58:16.00    60.705
 unit3   2021-09-01 07:58:31.00    98.665
 unit3   2021-09-01 07:58:47.00    44.06
 unit3   2021-09-01 07:59:16.00    40.32

这是我的表 2 ( unit_table)：

 UnitNo  userid
 --------------
 unit1   1122
 unit2   1122
 unit3   1122
 unit4   5577
 unit5   5577
 unit6   8888

这是我的表 3 ( users_table)：

 userid   username
--------------------
 1122     Rolly
 1122     Efren
 1122     Mark   --  edited to match OP comment
 5577     Bert
 5577     Jay
 8888     Eric

预期成绩：

 用户名 userid UnitNo overord overex overc ttover
 罗利 1122 单元 1 2 1 2 5
 埃弗伦 1122 单元 2 1 1 1 3
4

2 回答 2

0 
-- Please try this code and see if it works for you.
-- It doesnt match the result set you posted, but I beleive it is correct based on your sample data

SELECT
-- without a table that we can use to xref unitno to username we are forced to use CASE
-- this is not recommended and you should consider creating the necessary xref table
  CASE WHEN avh.UnitNo = 'unit1' THEN 'Rolly' 
       WHEN avh.UnitNo = 'unit2' THEN 'Efren' 
       WHEN avh.UnitNo = 'unit3' THEN 'Mark' END AS Username,
-- ---------------------------------------------------------------------------------------
  av.userid,
  avh.UnitNo,

-- I consider that you need to reference upper limits to give you the requisite breaks -- as below
  SUM(CASE WHEN speed >= 41 AND speed < 71 THEN 1 ELSE 0 END) AS overord,
  SUM(CASE WHEN speed >= 71 AND speed < 91 THEN 1 ELSE 0 END) AS overex,
  SUM(CASE WHEN speed >= 91 THEN 1 ELSE 0 END) AS overc,
  SUM(CASE WHEN speed >= 41 THEN 1 ELSE 0 END) AS ttover
FROM 
    unitlog_table AS avh
INNER JOIN 
    unit_table AS av ON avh.UnitNo = av.UnitNo
WHERE 
--  removed BETWWEEN and addeed half open intervals....google is your friend
    avh.timestamp >= '2021-09-01 00:00:00.00' AND avh.timestamp < '2021-09-01 08:00:00.00'
    AND av.userid = 1122
GROUP BY
    avh.UnitNo,
    av.userid
用户名 用户身份 单位编号 超标 过度交易 过关 超过
罗利 1122 单元1 3 2 0 5
埃弗伦 1122 单元2 3 0 0 3
标记 1122 单元3 3 1 1 5
于 2021-10-26T15:43:14.973 回答
0

看起来你真的想要条件聚合。你只需要加入一些表，组，然后有条件地聚合它们

这个条件speed >= 41 and speed >= 71 and speed >= 91在逻辑上似乎是不正确的。
而且条件between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00'似乎也不对。
始终使用half open intervals >= AND < rather thanBETWEEN`

select avh.UnitNo, 
    count(case when speed >= 41 then 1 end) as overord,
    count(case when speed >= 71 then 1 end) as overex ,
    count(case when speed >= 91 then 1 end) as overc,
    count(case when speed >= 41 and speed >= 71 and speed >= 91 then 1 end) as ttover,
    ut.username
from 
    unitlog_table avh 
inner join
    unit_table unt on avh.UnitNo = unt.UnitNo
inner join
    users_table ut on ut.userid = unt.userid
where 
    ut.userid = '1122'
    and timestamp between '2021-09-01 00:00:00.00' and '2021-09-01 08:00:00.00'
group by
    avh.UnitNo;
于 2021-10-26T23:56:43.123 回答