Question

通过计算大于MYSQL COUNT的记录，我的CURDATE状态效果很好。如何根据指定列的CURDATE明确指定此查询？

SELECT COUNT(ID) as total_count 
FROM HTG_ScheduleRequest 
WHERE (ScheduleDateCurrent > CURDATE()) 
    AND JobStatus = '3' 
GROUP BY SSR

Answer 1

以下查询可以解决问题

SELECT COUNT(ID) as total_count 
FROM HTG_ScheduleRequest 
WHERE (ScheduleDateCurrent BETWEEN DATE_ADD(DATE(CURDATE()), INTERVAL 1 DAY)
          AND  DATE_ADD(DATE(CURDATE()), INTERVAL 2 DAY)) 
    AND JobStatus = '3' 
GROUP BY SSR

Answer 2

“简单”的方式是：

WHERE date(ScheduleDateCurrent) = date_add(CURDATE(), interval 1 day) AND JobStatus = '3'

更好的方法是：

WHERE JobStatus = '3' AND
      ScheduleDateCurrent >= date_add(CURDATE(), interval 1 day) AND
      ScheduleDateCurrent < date_add(CURDATE(), interval 2 day)

这更好的原因是因为它可以利用JobStatus, ScheduleDateCurrent上的索引（如果有的话）。

Answer 3

要仅计算明天日期（和非NULL ID）的行，您可以这样做：

SELECT COUNT(ID) as total_count 
FROM HTG_ScheduleRequest 
WHERE (ScheduleDateCurrent = ADDDATE(CURDATE(),1)) 
    AND JobStatus = '3' 
GROUP BY SSR

MySQL COUNT在明天的日期基于CURDATE

3 个答案: