Question

我有一个sql语句如下：

    SELECT  s.sp_id,s.synopsis,s.logline,s.user_id,s.bin_status,s.sp_order,s.sp_down_count,s.sp_name,
            `users`.firstname as `firstname`,`users`.lastname as `lastname`,s.status,
            `users`.email as `email`,`users`.phone as `phone`,`users`.address1 as `address1`,
            `users`.address2 as `address2`,`users`.`r_group`, view_coverages.grade,coverages.comments  

    FROM s 
    LEFT JOIN `users` ON `users`.user_id=s.user_id  
    LEFT JOIN view_coverages ON view_coverages.sp_id=s.sp_id 
    LEFT JOIN `coverages` ON `coverages`.sp_id=s.sp_id  

    WHERE $email_filter lower(s.synopsis) like '%$search_word_fix%'
    OR lower(s.sp_name) like '%$search_word_fix%'
    OR lower(s.logline) like '%$search_word_fix%'
     OR lower(coverages.comments) like '% $search_word_fix %'
    ORDER BY view_coverages.grade DESC

当我显示结果时，我得到了很多重复。我想显示搜索结果，其中s.sp_name不重复。

Answer 1

您有两种选择：

将SELECT更改为SELECT DISTINCT，只选择唯一且不重复的结果。
GROUP BY s.sp_name但您需要在所选的所有其他字段上执行聚合功能。

由于我确定您无法对某人的姓名，地址，电话号码等进行平均或求和，因此您应该尝试选项1（SELECT DISTINCT）。如果您的重复行中有非唯一字段，则除了唯一字段外，您需要GROUP BY每个字段;在剩余的唯一字段上使用聚合函数（即SUM，AVG等）。

Answer 2

Ty this：

SELECT  s.sp_id,s.synopsis,s.logline,s.user_id,s.bin_status,s.sp_order,s.sp_down_count,s.sp_name,
            `users`.firstname as `firstname`,`users`.lastname as `lastname`,s.status,
            `users`.email as `email`,`users`.phone as `phone`,`users`.address1 as `address1`,
            `users`.address2 as `address2`,`users`.`r_group`, view_coverages.grade,coverages.comments  

    FROM s 
    LEFT JOIN `users` ON `users`.user_id=s.user_id  
    LEFT JOIN view_coverages ON view_coverages.sp_id=s.sp_id 
    LEFT JOIN `coverages` ON `coverages`.sp_id=s.sp_id  

    WHERE $email_filter lower(s.synopsis) like '%$search_word_fix%'
    OR lower(s.sp_name) like '%$search_word_fix%'
    OR lower(s.logline) like '%$search_word_fix%'
     OR lower(coverages.comments) like '% $search_word_fix %'
  ADD --->       group by s.sp_name  
    ORDER BY view_coverages.grade DESC

LEFT JOIN和重复结果

2 个答案: