MySQL INTERVAL Mins

Question

我正在尝试使用此查询获取2小时或更长时间的所有记录

$minutes = 60 * 2

SELECT COUNT(id) AS TOTAL, job_id 
  from tlb_stats 
 WHERE log_time >= DATE_SUB(CURRENT_DATE, INTERVAL $minutes MINUTE) 
GROUP BY job_id

它只选择最近的记录并跳过旧记录.当我更改log_time <=时,它只选择旧的并跳过新的.

我究竟做错了什么？

Answer 1

Try

$minutes = 60 * 2

SELECT COUNT(`id`) AS `TOTAL`, `job_id` 
  FROM `tlb_stats` 
  WHERE `log_time` < DATE_SUB(NOW(), INTERVAL $minutes MINUTE) 
  GROUP BY `job_id`

• use backticks to quote fields (words like "total" and "id" may some day mean something in mysql)
• use NOW() for CURRENT_DATE just means 2010-08-04, not including the time
• use < to get entries older than that date.