将一个MySQL表的ID名称连接到另一个MySQL表的ID

我有一个由ID标识的客户机详细信息表，如下所示：

ID (the clientcode), Name, Details

我想引用另一个包含销售信息的表中的ID，并在查询中提取客户的名称

仅获取ID（clientcode）的原始查询字符串如下：

我还想获取clientcode引用的客户机的名称

我尝试了一些左连接，但无法使查询正常工作。

这应该可以

SELECT c.ID, c.name, SUM(i.sales) 
FROM inventory i
JOIN clients c ON c.ID = i.clientcode
WHERE i.manufacturer='1' 
GROUP BY c.ID, ORDER BY SUM(i.sales) DESC

---

实现这一点的一个简单查询是：

SELECT i.clientcode, d.name, SUM(i.sales) FROM inventory i, details d
WHERE i.manufacturer='1'
  AND d.clientcode = i.clientcode
GROUP BY i.clientcode ORDER BY SUM(i.sales) DESC

来，试试这个

SELECT  inventory.clientcode, 
        SUM(inventory.sales),
        clientdetails.Name
FROM inventory 
        INNER JOIN clientdetails
            ON inventory.clientcode = clientdetails.clientcode
WHERE inventory.manufacturer='1' 
GROUP BY inventory.clientcode, clientdetails.Name
ORDER BY SUM(inventory.sales) DESC

---

让我们看看什么不起作用

SELECT i.clientcode, d.name, SUM(i.sales) FROM inventory i, details d
WHERE i.manufacturer='1'
  AND d.clientcode = i.clientcode
GROUP BY i.clientcode ORDER BY SUM(i.sales) DESC

SELECT  inventory.clientcode, 
        SUM(inventory.sales),
        clientdetails.Name
FROM inventory 
        INNER JOIN clientdetails
            ON inventory.clientcode = clientdetails.clientcode
WHERE inventory.manufacturer='1' 
GROUP BY inventory.clientcode, clientdetails.Name
ORDER BY SUM(inventory.sales) DESC

SELECT  a.clientcode, 
        SUM(a.sales),
        b.Name
FROM inventory a
        INNER JOIN clientdetails b
            ON a.clientcode = b.clientcode
WHERE a.manufacturer='1' 
GROUP BY a.clientcode, b.Name
ORDER BY SUM(a.sales) DESC