如何在 JOIN 中包含另一个表

Question

下面是我的mysql查询

SELECT 
    opensalesorder.so_number,
    items.VendorName,
    opensalesorder.item_number,
    items_custom_fields.FieldValue AS `Stock Item`,
    vendor_custom_fields.FieldValue AS `Paid Freight Allowance`,
    items.QuantityOnHand,
    items.ReorderPoint,
    items.MaxQty,
    SUM(opensalesorder.quantity_on_order),
    items.PurchaseCost,
    items.VendorName,
    items.VendorName,
    items.PurchaseCost,
    opensalesorder.status,
    items.ItemType
FROM
    vendor,
    `opensalesorder` 
inner join  items 
  on opensalesorder.item_number = items.ItemName
JOIN items_custom_fields 
  ON items_custom_fields.ItemName = items.ItemName
JOIN vendor_custom_fields 
  ON vendor_custom_fields.VName = vendor.VName
WHERE opensalesorder.item_number = items.ItemName 
        and items_custom_fields.FieldName ='Stock Item' 
        and vendor_custom_fields.FieldName ='Paid Freight Allowance' 
        and opensalesorder.status NOT LIKE 'on po'  
        AND opensalesorder.so_number NOT IN ('2','3') 
        AND items.VendorName NOT IN ('Access') 
        AND opensalesorder.item_number NOT IN ('018-0001')  
        group by opensalesorder.item_number
LIMIT 100

在执行此查询时，我收到类似的错误

#1054 - Unknown column 'vendor.VName' in 'on clause' 

但我在 FROM 子句中包含了供应商表。 这是在 JOIN 中包含表的正确方法吗？ 那么这个查询有什么问题呢？

编辑：

显示为 opensalesorder 创建表

CREATE TABLE `opensalesorder` (
  `so_number` decimal(10,0) NOT NULL,
  `item_number` varchar(20) NOT NULL,
  `quantity_on_order` int(11) NOT NULL,
  `quantity_to_order` int(11) NOT NULL,
  `status` varchar(20) NOT NULL,
  `editsequence` text NOT NULL,
  `TxnLineID` text NOT NULL,
  `TxnID` text NOT NULL,
  `dateCreated` date NOT NULL,
  `shipDate` date NOT NULL,
  `customer` text NOT NULL,
  `itemclass` text NOT NULL,
  UNIQUE KEY `unique_mapping` (`so_number`,`item_number`),
  KEY `so_number` (`so_number`),
  KEY `item_number` (`item_number`),
  KEY `status` (`status`)
)  

显示为项目创建表

CREATE TABLE `items` (
  `ItemName` varchar(30) NOT NULL,
  `VendorName` varchar(40) DEFAULT NULL,
  `QuantityOnHand` int(11) DEFAULT NULL,
  `QuantityOnSalesOrder` int(11) DEFAULT NULL,
  `ReorderPoint` int(11) DEFAULT NULL,
  `PurchaseCost` double DEFAULT NULL,
  `AverageCost` double DEFAULT NULL,
  `SalesPrice` double DEFAULT NULL,
  `PurchaseDesc` varchar(200) DEFAULT NULL,
  `SalesDesc` varchar(200) DEFAULT NULL,
  `ItemType` varchar(30) DEFAULT NULL,
  `FreeCode` int(11) DEFAULT NULL,
  `SubGroup` varchar(10) DEFAULT NULL,
  `DateNewItem` date DEFAULT NULL,
  `Notes` text,
  `MaxQty` int(11) DEFAULT NULL,
  `QuantityOnPO` int(11) DEFAULT NULL,
  PRIMARY KEY (`ItemName`),
  KEY `ItemName` (`ItemName`),
  KEY `VendorName` (`VendorName`)
)

显示为 vendor_custom_fields 创建表

CREATE TABLE `vendor_custom_fields` (
  `VName` text NOT NULL,
  `FieldName` text NOT NULL,
  `FieldValue` text NOT NULL,
  `FieldType` text NOT NULL,
  PRIMARY KEY (`VName`(120),`FieldName`(120)),
  FULLTEXT KEY `VName_index` (`VName`)
) 

显示为供应商创建表

 CREATE TABLE `vendor` (
  `VName` varchar(60) NOT NULL,
  `CompanyName` varchar(100) NOT NULL,
  `Address1` varchar(120) NOT NULL,
  `Address2` varchar(120) NOT NULL,
  `City` varchar(40) NOT NULL,
  `State` varchar(50) NOT NULL,
  `PostalCode` varchar(13) NOT NULL,
  `Phone` varchar(13) NOT NULL,
  `Fax` varchar(13) NOT NULL,
  `AlternatePhone` varchar(13) NOT NULL,
  `AlternateContact` varchar(30) NOT NULL,
  `Email` varchar(40) NOT NULL,
  `AccountNumber` varchar(30) NOT NULL,
  `Balance` double NOT NULL,
  `RepEmail` varchar(40) NOT NULL,
  `FreightAllowance` double DEFAULT NULL,
  `MinimumPOLimit` double DEFAULT NULL,
  `Notes` text NOT NULL,
  PRIMARY KEY (`VName`)
) 

Answer 1

我认为问题在于将隐含连接与（未隐含的）“声明”连接混合在一起。当我将“供应商”作为常规连接放入时，查询很好。

（我不得不注释掉对“items_custom_fields”的引用，因为您没有包含表定义）

这是fiddle。