MySQL查询的WHERE条件问题

Question

我有一个工作查询作为

SELECT p.id, 
      p.name AS ProductName, 
      count(DISTINcT s.salesid) as Sales, 
      Count(DISTINCT l.linkid) as Links 
    FROM products p 
LEFT JOIN sales s ON p.id=s.productid 
LEFT JOIN links l ON p.id=l.productid 
GROUP BY p.id 

现在，我只需要那些记录，或者销售不等于0或链接不等于0或两个不等于0

我该如何做到这一点？

Answer 1

添加HAVING子句

SELECT p.id, p.name AS ProductName, 
count(DISTINcT s.salesid) as Sales, Count(DISTINCT l.linkid) as Links 
FROM products p 
LEFT JOIN sales s ON p.id=s.productid 
LEFT JOIN links l ON p.id=l.productid 
GROUP BY p.id 
HAVING Sales > 0 OR Links > 0