选择总和

Question

我有两个表“发票”和“invoices_account”

通过查询

SELECT DATE_FORMAT(inv_created, '%Y') as 'year', 
     COUNT(*) as 'total' 
FROM invoices as i 
WHERE inv_way = "OUT" 
GROUP BY DATE_FORMAT(inv_created, '%Y') 

我拿到发票的金额，每年这样的：

2011 | 80 
2012 | 120 

等。

我需要的是在第一个查询中，按年份从“invoices_account”。“inv_total”中获取所有条目的摘要。关系是1：1。这意味着2011年的80份发票在“invoices_account”中有80行。我需要有这样的事情

2011 | 80 | 1.000.000 € 
2012 | 120 | 230.000.000 € 

Answer 1

检查INNER JOIN

SELECT DATE_FORMAT(inv_created, '%Y') as 'year', 
     COUNT(*) as 'total', 
     SUM(ia.inv_total) as money_total 
FROM invoices as i 
JOIN invoices_account ia 
    ON i.id = ia.id 
WHERE inv_way = "OUT" 
GROUP BY DATE_FORMAT(inv_created, '%Y')