合并两个复杂的MYSQL查询

Question

我想要合并两个复杂的MYSQL查询的方法。

查询1：

SELECT p.* 
FROM posts p 
    INNER JOIN 
    (
     SELECT a.ID 
     FROM posts a 
       INNER JOIN post_tags b 
        ON a.ID = b.post_ID 
     WHERE a.post LIKE '%mmmm%' AND 
       b.tagname IN ('#test','#iseeyou') 
     GROUP BY ID 
     HAVING COUNT(DISTINCT b.tagname) = 2 
    ) sub ON p.ID = sub.ID 
ORDER BY p.upvotes DESC, p.unix_timestamp DESC 

问题2：

SELECT p.*, ((upvotes + 1.9208)/(upvotes + downvotes) - 1.96 * SQRT((upvotes * downvotes) 
/(upvotes + downvotes) + 0.9604)/(upvotes + downvotes)) 
/(1 + 3.8416/(upvotes + downvotes)) AS ci_lower_bound 
FROM posts p WHERE upvotes + downvotes > 0 
AND p.unix_timestamp BETWEEN 1363023402 AND 1363109802 ORDER BY ci_lower_bound DESC 

一个小的表定义在SQL Fiddle

实际上给出的，第一个是一个搜索查询和所述第二人给基于过去24小时内投票的最流行结果，所以我想使用基于第二个公式中使用的公式的搜索查询以及时间范围

Answer 1

最小的变化是这样的（如果我明白你想要什么正确）

SELECT p.*, ((upvotes + 1.9208)/(upvotes + downvotes) - 1.96 * SQRT((upvotes * downvotes) 
/(upvotes + downvotes) + 0.9604)/(upvotes + downvotes)) 
/(1 + 3.8416/(upvotes + downvotes)) AS ci_lower_bound 
FROM posts p 
    INNER JOIN 
    (
     SELECT a.ID 
     FROM posts a INNER JOIN post_tags b ON a.ID = b.post_ID 
     WHERE a.post LIKE '%mmmm%' AND b.tagname IN ('#test','#iseeyou') 
     GROUP BY ID 
     HAVING COUNT(DISTINCT b.tagname) = 2 
    ) sub ON p.ID = sub.ID 
WHERE upvotes + downvotes > 0 
AND p.unix_timestamp BETWEEN 1363023402 AND 1363109802 
ORDER BY ci_lower_bound DESC 

可能是一个触摸更有效地交换在子查询的WHERE子句周围（领导％上等不使用索引，因此可能更有效的参与，对上post_tags易索引检查））

SELECT p.*, ((upvotes + 1.9208)/(upvotes + downvotes) - 1.96 * SQRT((upvotes * downvotes) 
/(upvotes + downvotes) + 0.9604)/(upvotes + downvotes)) 
/(1 + 3.8416/(upvotes + downvotes)) AS ci_lower_bound 
FROM posts p 
    INNER JOIN 
    (
     SELECT a.ID 
     FROM post_tags b STRAIGHT_JOIN posts a ON a.ID = b.post_ID 
     WHERE a.post LIKE '%mmmm%' AND b.tagname IN ('#test','#iseeyou') 
     GROUP BY ID 
     HAVING COUNT(DISTINCT b.tagname) = 2 
    ) sub ON p.ID = sub.ID 
WHERE upvotes + downvotes > 0 
AND p.unix_timestamp BETWEEN 1363023402 AND 1363109802 
ORDER BY ci_lower_bound DESC