SQLSTATE [23000]：违反完整性约束：1062 键 'group_key' 的重复条目 'xxxx'

Question

我目前有使用 PDO 的 SELECT，但我收到此错误消息

SELECT a.*, UNIX_TIMESTAMP(a.createdon) AS 时间戳, ct.cityname, ct.SeoCityName, scat.subcatname, scat.SeoSubcatName, COUNT(*) AS piccount, p.picfile, UNIX_TIMESTAMP(feat.featuredtill) AS featurestill FROM prefix_ads 一个 INNER JOIN prefix_cities ct ON a.cityid = ct.cityid INNER JOIN prefix_subcats scat ON a.subcatid = scat.subcatid 左外连接 prefix_adxfields axf ON a.adid = axf.adid 左外连接 prefix_adpics p ON a.adid = p.adid AND p.isevent = '0' LEFT OUTER JOIN prefix_featured feat ON a.adid = feat.adid AND feat.adtype = 'A' 其中 a.catid = '10' AND a.enabled = '1' AND a.verified = '1' AND a.expireson >= NOW() 由 a.adid 分组 ORDER BY a.createdon DESC 限制 0, 18

SQLSTATE[23000]：违反完整性约束：1062 键 'group_key' 的重复条目 'xxxx'

xxxx = 曾经是列表中的如果

有人可以帮忙吗？

解释

大批 ( [id] => 1 [0] => 1 [select_type] => 简单 [1] => 简单 [表] => scat [2] => 粪便 [类型] => 全部 [3] => 全部 [possible_keys] => 初级 [4] => 初级 [关键] => [5] => [key_len] => [6] => [参考] => [7] => [行] => 152 [8] => 152 [过滤] => 100.00 [9] => 100.00 [额外] => 使用临时；使用文件排序 [10] => 使用临时的；使用文件排序 ) 大批 ( [id] => 1 [0] => 1 [select_type] => 简单 [1] => 简单 [表] => 一个 [2] => 一个 [类型] => 参考 [3] => 参考 [possible_keys] => subcatid,cityid,已验证,启用,expireson,catid,ct_ads [4] => subcatid,cityid,已验证,启用,expireson,catid,ct_ads [key] => subcatid [5] => subcatid [key_len] => 2 [6] => 2 [参考] => DB.scat.subcatid [7] => DB.scat.subcatid [行] => 150 [8] => 150 [过滤] => 100.00 [9] => 100.00 [额外] => 使用 where [10] => 使用 where ) 大批 ( [id] => 1 [0] => 1 [select_type] => 简单 [1] => 简单 [表] => ct [2] => ct [类型] => eq_ref [3] => eq_ref [possible_keys] => 初级 [4] => 初级 [键] => 初级 [5] => 初级 [key_len] => 2 [6] => 2 [参考] => DB.a.cityid [7] => DB.a.cityid [行] => 1 [8] => 1 [过滤] => 100.00 [9] => 100.00 [额外] => [10] => ) 大批 ( [id] => 1 [0] => 1 [select_type] => 简单 [1] => 简单 [表格] => axf [2] => axf [类型] => 参考 [3] => 参考 [possible_keys] => 添加 [4] => 添加 [键] => 添加 [5] => 添加 [key_len] => 4 [6] => 4 [参考] => DB.a.adid [7] => DB.a.adid [行] => 1 [8] => 1 [过滤] => 100.00 [9] => 100.00 [额外] => 使用索引 [10] => 使用索引 ) 大批 ( [id] => 1 [0] => 1 [select_type] => 简单 [1] => 简单 [表格] => p [2] => p [类型] => 参考 [3] => 参考 [possible_keys] => 添加 [4] => 添加 [键] => 添加 [5] => 添加 [key_len] => 5 [6] => 5 [参考] => DB.a.adid,const [7] => DB.a.adid,常量 [行] => 1 [8] => 1 [过滤] => 100.00 [9] => 100.00 [额外] => [10] => ) 大批 ( [id] => 1 [0] => 1 [select_type] => 简单 [1] => 简单 [表格] => 壮举 [2] => 壮举 [类型] => eq_ref [3] => eq_ref [possible_keys] => 添加 [4] => 添加 [键] => 添加 [5] => 添加 [key_len] => 7 [6] => 7 [参考] => DB.a.adid,const [7] => DB.a.adid,常量 [行] => 1 [8] => 1 [过滤] => 100.00 [9] => 100.00 [额外] => [10] => ) id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE scat ALL PRIMARY NULL NULL NULL 152 使用临时；使用文件排序 1 SIMPLE a ref subcatid,cityid,verified,enabled,expireson,catid,c... subcatid 2 DB.scat.subcatid 150 使用 where 1 简单 ct eq_ref PRIMARY PRIMARY 2 DB.a.cityid 1 1 SIMPLE axf ref adid adid 4 DB.a.adid 1 使用索引 1 SIMPLE p ref adid adid 5 DB.a.adid,const 1 1 简单的壮举 eq_ref adid adid 7 DB.a.adid,const 1

问候 G

Answer 1

您的查询不正确。
您不应该正确使用那么多选择字段和分组依据。

例如：

SELECT                                                                                                  
    UNIX_TIMESTAMP(a.createdon) AS timestamp,                                                               
    ct.cityname,                                                                                            
    ct.SeoCityName,                                                                                         
    scat.subcatname,                                                                                        
    scat.SeoSubcatName,                                                                                     
    p.picfile,                                                                                              
    UNIX_TIMESTAMP(feat.featuredtill) AS featuredtill,                                                      
    COUNT(*) AS piccount                                                                                    
FROM                                                                                                    
    prefix_ads a                                                                                          
    INNER JOIN prefix_cities ct ON a.cityid = ct.cityid                                    
    INNER JOIN prefix_subcats scat ON a.subcatid = scat.subcatid                                 
    LEFT OUTER JOIN prefix_adxfields axf ON a.adid = axf.adid                                     
    LEFT OUTER JOIN prefix_adpics p ON a.adid = p.adid AND p.isevent = '0'                  
    LEFT OUTER JOIN prefix_featured feat ON a.adid = feat.adid AND feat.adtype = 'A'        
WHERE
    a.catid = '10'                                                                        
    AND a.enabled = '1' 
    AND a.verified = '1' 
    AND a.expireson >= NOW()                         
GROUP BY 
    1,2,3,4,5,6,7                                                                             
ORDER BY 
    a.createdon DESC                                                                   
LIMIT 0, 18

由于 COUNT 是一个分组函数，它不会继续 'group by' 子句