Question

我有一个select语句，我需要首先按相关性排序，获得前十个相关性，按rand（）排序，然后将其限制为1，但我认为不可能这样做有2个不同的顺序和限制声明。所以，我的问题是，这个问题有解决办法吗？感谢。

SELECT id, input, response, 
MATCH (
input
)
AGAINST (
 'cat frogs trees'
IN NATURAL LANGUAGE
MODE
) AS relevance
FROM allData
HAVING relevance >0
ORDER BY relevance DESC
LIMIT 10
ORDER BY RAND()
LIMIT 1

Answer 1

使用子查询：

SELECT t.*
FROM (SELECT id, input, response, 
             MATCH (input) AGAINST ('cat frogs trees' IN NATURAL LANGUAGE MODE) AS relevance
      FROM allData
      HAVING relevance > 0
      ORDER BY relevance DESC
      LIMIT 10
     ) t
ORDER BY RAND()
LIMIT 1;

在SQL中有两个不同的顺序和限制语句

1 个答案: