Php、MySql、带两个计数的单个查询

我需要在一个查询中执行两个不同的计数

First Query: count number of transactions from today 30 days back.
Second Query: count number of transactions from last 60 until last 30 days.

我的第一个查询工作正常，如下所示：

SELECT 
  COUNT(*) AS sales 
FROM
  transactions 
WHERE DATE(created) > DATE_SUB(NOW(), INTERVAL 30 DAY) 
  AND STATUS = 1;

---

如何将第二个查询合并到上述查询中？

您可以在以下情况下使用

COUNT

和

CASE：

SELECT 
  COUNT(CASE WHEN DATE(created) > DATE_SUB(NOW(), INTERVAL 30 DAY) THEN 1 END) AS c1,
  COUNT(CASE WHEN DATE(created) <= DATE_SUB(NOW(), INTERVAL 30 DAY) THEN 1 END) AS c2
FROM transactions 
WHERE DATE(created) > DATE_SUB(NOW(), INTERVAL 60 DAY) 
  AND STATUS = 1;

谢谢你，这很好用。我还没有测试过Union，但用例更干净了。@Alko不客气。如果您的问题已经解决，您可以：）
SELECT COUNT(*) AS sales 
FROM transactions 
WHERE DATE(created) > DATE_SUB(NOW(), INTERVAL 30 DAY) 
  AND STATUS = 1
UNION ALL
SELECT COUNT(*) 
FROM transactions 
WHERE DATE(created) > DATE_SUB(NOW(), INTERVAL 60 DAY) 
  AND DATE(created) < DATE_SUB(NOW(), INTERVAL 30 DAY) 
  AND STATUS = 1