我已经尝试了我能想到的一切。问题。主表具有与第二个表名匹配的列。我不能加入。有什么帮助吗?
SELECT
Inspections.Id,
Inspections.Custom_Specs,
Custom_Specs.Id AS Custom_Id
FROM Inspections
JOIN Custom_Specs ON Inspections.Custom_Specs=Custom_Specs.Id
Inspections.Id, (Value: 1)
Inspections.Custom_Specs, (Value: 5)
Custom_Specs.Id, (Value: 5)
Custom_Specs.Spec_Name , (Value: Name Of Spec)
Custom_Specs.Id AS Specs_Id
输出:
<option value=\"". $row["Specs_Id."] ."\">". $row["Spec_Name"] ."</option>
更新:
查询哪个对我有用:
SELECT
Inspections.Id,
Inspections.Custom_Specs,
Custom_Specs.Id,
Custom_Specs.Spec_Name
FROM Inspections
LEFT JOIN Custom_Specs ON Inspections.Custom_Specs = Custom_Specs.Id
答案 0 :(得分:0)
您将规格与ID列进行比较。这是两种不同的数据类型。下面的查询应该为您完成工作:
SELECT
Custom_Specs.Id
Custom_Specs.Spec_Name
FROM Inspections
LEFT JOIN Custom_Specs ON Inspections.Custom_Specs = Custom_Specs.Id