Question

我正在尝试创建一个检查客户端表的查询，并返回具有最近30天，365天和所有时间的特定值的用户数。

所有时间都很简单：

$stmt = $conn->prepare("SELECT count(id) AS count FROM clients WHERE referred =  :refid");
$stmt->bindParam(':refid', $refid);
$stmt->execute();
$totalreferrals = $stmt->fetchAll();

表：

id |   signup   | reffered |
----------------------------
2  | 2012-08-24 |   14     |
----------------------------
3  | 2011-10-13 |   14     |

我不确定是否可以使用UNION组合查询，或者我是否应该只进行三个不同的查询。有什么帮助吗？

Answer 1

我认为你想在列中而不是在行中，如果是这样的话，那么

SELECT  COUNT(CASE WHEN DATEDIFF(CURDATE(),signup) <= 30 THEN id
                   ELSE NULL
              END) AS Last30days ,
        COUNT(CASE WHEN DATEDIFF(CURDATE(), signup) <= 365 THEN id
                   ELSE NULL
              END) AS Last365Days ,
        COUNT(*) AS Alltime
FROM    Table1
WHERE   reffered = 14

SQLFiddle http://sqlfiddle.com/#!2/6e6ce/2

Answer 2

也许这可以解决问题：

SELECT count(id) AS count FROM clients WHERE referred = :refid AND BETWEEN ADDDATE(NOW(), INTERVAL -1 MONTH) AND NOW();

SELECT count(id) AS count FROM clients WHERE referred = :refid AND BETWEEN ADDDATE(NOW(), INTERVAL -1 YEAR) AND NOW();

MySQL - 计算用户数量（最近30天，最后一年，所有时间）

2 个答案: