Question

我需要优化MySQL查询。我有一张桌子＆＃39;投注＆＃39;少于100.000条记录。我需要显示当月的所有记录。

SELECT betting.id 
FROM betting, members 
WHERE members.status = 1 
and members.id = betting.user 
and betting.date between '2016-09-01' and '2016-09-30' 
and betting.status = 1 
and betting.type = 1;

当我尝试解释命令时：

SIMPLE  betting range   user,date,type,type_2   type_2  7   NULL    4966    Using where
SIMPLE  members eq_ref  PRIMARY PRIMARY 4   betting.user    1   Using where

有没有机会减少数据库搜索？问题是显示此结果的页面调用过于频繁，导致大量CPU成本。不幸的是我无法缓存结果，因为它们需要生效。有什么想法吗？

Answer 1

以下是以更容易（至少对我而言）理解的格式编写的查询：

SELECT b.id 
FROM betting b join
     members m
     ON m.id = b.user 
WHERE m.status = 1  
      b.date between '2016-09-01' and '2016-09-30' and
      b.status = 1 and
      b.type = 1;

我认为最好的索引策略是：betting(status, type, date, user)和members(id, status)。

Mysql优化查询之间的日期

1 个答案: