CASE BETWEEN语句

Question

我的数据库中有一个简单的日志表。对于每个页面访问，都会插入一行。现在我想总结一下今天和昨天的某个专栏。

我尝试了以下查询：

SELECT Sum(CASE 
             WHEN `time` > 1364767200 THEN `sqlquerycount` 
           end) AS `today`, 
       Sum(CASE 
             WHEN `time` BETWEEN 1364684400 AND 1364767200 THEN `sqlquerycount` 
           end) AS `yesterday` 
FROM   `log` 

以下PHP脚本的结果如下：

$sql = "SELECT 
        SUM(CASE WHEN `time` > ".strtotime("today")." THEN `sqlQueryCount` END) AS `today`,
        SUM(CASE WHEN `time` BETWEEN ".strtotime("yesterday")." AND ".strtotime("today")." THEN `sqlQueryCount` END) AS `yesterday`
    FROM `log`";

“昨天”仍然是空的，但我看不出这个查询有任何问题。有什么想法吗？

Answer 1

我敢打赌

$sql = "SELECT 
        SUM(CASE WHEN `time` > ".strtotime("today")." THEN `sqlQueryCount` ELSE 0 END) AS `today`,
        SUM(CASE WHEN `time` BETWEEN ".strtotime("yesterday")." AND ".strtotime("today")." THEN `sqlQueryCount` ELSE 0 END) AS `yesterday`
    FROM `log`";

..。假设sqlQueryCount是您要对其进行求和的列！