Question

我有以下MySQL查询：

SELECT Ychastok_number AS 'Номер участка',podrazdelenie.Name AS Объект,type.Name AS Машина,avto.Marka AS Марка, avto.Gos_number AS 'Гос.Номер', avto.Invent_num AS 'Инвентарный номер', SUM(OtrabotanoMachine_hours) as 'Часов в рабочих сменах',SUM(sec.Hours) as Простои,SUM(TimeRaboty_dvigatelya)AS 'Отработано времени',TRUNCATE((SUM(sec.Hours)/ SUM(OtrabotanoMachine_hours))*100,1) as 'Процент простоев от часов рабочих смен', TRUNCATE((SUM(TimeRaboty_dvigatelya)/ SUM(OtrabotanoMachine_hours))*100,1) as 'Процент работ', CONVERT(group_concat(concat(prostoy.Prichina,'=',sec.Hours) separator ';') USING 'utf8') as 'Причины простоев'
FROM
jos_addRabotyAndProstoyMain main
INNER JOIN avto ON main.Marka=avto.ID_Avto
INNER JOIN typeconstructionmechanizm type ON main.Machine = type.ID_TypeConstructionMechanizm
INNER JOIN podrazdelenie ON main.Ychastok = podrazdelenie.ID_Podrazdelenie
INNER JOIN prostoy ON jos_addRabotyAndProstoySecond.Prostoy = prostoy.ID_Prosyoy
INNER JOIN (
   SELECT id_fk, SUM(Hours) AS Hours
   FROM jos_addRabotyAndProstoySecond 
   GROUP BY id_fk) sec ON sec.id_fk = main.id
GROUP BY  Ychastok_number,podrazdelenie.Name,type.Name,avto.Marka,avto.Gos_number,avto.Invent_num

我收到了这个错误：

＃1054 - 'on clause'中的未知列'jos_addRabotyAndProstoySecond.Prostoy'

添加此行后

INNER JOIN prostoy ON jos_addRabotyAndProstoySecond.Prostoy = prostoy.ID_Prosyoy

如何解决此错误？

Answer 1

您没有包含别名或名称jos_addRabotyAndProstoySecond的表格。因此该栏目未知。

事实上，除了子查询之外，查询中根本没有此表的证据。你可以：

使用另一个表中的（适当的）列
在FROM子句
将join放入子查询

目前还不清楚你想要完成什么;所以很难提出具体的建议。

＃1054 on子句错误中的未知列

1 个答案: