3臺數查詢mysql的

我有3個表3臺數查詢mysql的

products [which contains data related to products] 
    productid (int) 
    name (varchar) 
    price (float) 

sales [which contains data related to sales] 
    salesid (int) 
    productid (int) 
    time (datetime) 

links [which contains data related to links from products] 
    linkid (int) 
    productid (int) 
    link (text)

我需要這樣

ProductID Name TotalSales TotalLinkAvailable 
    1  ABCD  10    12 
    1  EFGH  7    25

輸出如何能夠做到這一點使用單個查詢？

感謝

編輯

我曾嘗試下面的查詢，沒有工作：

select p.name,count(s.salesid) as Sales, count(l.linkid) as Links 
from products p 
left join sales s on p.productid=s.productid 
left join links l on p.products=l.productid 
group by p.productid

來源

2010-12-10 I-M-JM

使用'JOIN'，'GROUP BY'和'COUNT'。我只是懶得寫現在的查詢。 – Bobby 2010-12-10 12:58:41

@Bobby：我試過以下查詢select p.name，count（s.salesid）as Sales，count（l.linkid）as鏈接 from產品p left join sales s on p.productid = s.productid left join links l on p.products = l.productid group by p.productid，但它不起作用 – 2010-12-10 12:59:55

請務必在問題中告訴我們您已經嘗試了什麼，它可以幫助您儘可能多地幫助您。 – Bobby 2010-12-10 13:13:37

SELECT p.productid AS ProductID, p.name AS Name, COUNT(s.salesid) AS TotalSales, COUNT(l.linkid) AS TotalLinkAvailable 
FROM products AS p 
LEFT JOIN sales AS s ON s.productid = p.productid 
LEFT JOIN links AS l ON l.productid = p.productid 
GROUP BY p.productid, p.name

假設有一個在示例性查詢結果的第二行中關於ProductID的拼寫錯誤。

來源

2010-12-10 13:00:48 Flinsch

類型的意思，請解釋一下嗎？ – 2010-12-10 13:20:15

@ I-M-JM - 在您的示例中，您將列出帶有2個不同名稱的產品1。 – JNK 2010-12-10 14:02:02

@ I-M-JM：* typo *（「打字錯誤」），而不是* type *。 – Flinsch 2010-12-12 17:06:36

select p.productid, p.name, count(s.salesid) as TotalSales, count(l.linkid) as TotalLinkAvailable 
    from products p 
     left join sales s 
      on p.productid = s.productid 
     left join links l 
      on p.productid = l.productid 
    group by p.productid, p.name

來源

2010-12-10 12:59:26

錯誤計數是兩遍 – 2010-12-10 13:18:04

select p.pname,count(s.salesid) as Sales ,count(l.linkid) as Links 
from products p left join sales s on p.productid=s.productid 
left join links l on p.products=l.productid 
group by p.productid

來源

2010-12-10 12:59:37 Chandresh

3臺數查詢mysql的

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