Question

我发现MySQL查询存在一个奇怪的问题我有这张桌子

+--------------+------------------+------+-----+---------+-------+
| Field        | Type             | Null | Key | Default | Extra |
+--------------+------------------+------+-----+---------+-------+
| aid          | varchar(50)      | NO   | PRI | NULL    |       |
| sid          | int(10) unsigned | NO   | PRI | NULL    |       |
| cid          | int(10) unsigned | NO   | PRI | NULL    |       |
| signature    | int(10) unsigned | NO   |     | NULL    |       |
| sig_name     | varchar(255)     | YES  |     | NULL    |       |
| sig_class_id | int(10) unsigned | YES  |     | NULL    |       |
| sig_priority | int(10) unsigned | YES  |     | NULL    |       |
| timestamp    | datetime         | NO   |     | NULL    |       |
| ip_src       | int(10) unsigned | YES  |     | NULL    |       |
| ip_dst       | int(10) unsigned | YES  |     | NULL    |       |
| ip_proto     | int(11)          | YES  |     | NULL    |       |
| layer4_sport | int(10) unsigned | YES  |     | NULL    |       |
| layer4_dport | int(10) unsigned | YES  |     | NULL    |       |
| isp          | varchar(16)      | YES  |     | NULL    |       |
| ispdst       | varchar(16)      | YES  |     | NULL    |       |
+--------------+------------------+------+-----+---------+-------+

当我执行

时

 SELECT DISTINCT timestamp
      , aid
      , sig_name
      , inet_ntoa(ip_src)
      , inet_ntoa(ip_dst)
 FROM acid_event
 WHERE ip_src !=0 
   AND ip_dst !=0
   AND 1=1 
   AND aid = '10.10.10.94' 
   AND ip_src = '3305661330'
GROUP BY aid
       , ip_src
       , ip_dst
       , timestamp
       , sig_name
       , isp
ORDER BY timestamp DESC 
LIMIT 0,25;

MySQL返回结果，一切正常但是当我将查询更改为

时

SELECT DISTINCT timestamp
     , aid
     , sig_name
     , inet_ntoa(ip_src)
     , inet_ntoa(ip_dst)
FROM acid_event 
WHERE ip_src !=0 
  AND ip_dst !=0 
  AND 1=1
  AND ip_src = '3305661330' 
GROUP BY aid
       , ip_src
       , ip_dst
       , timestamp
       , sig_name
       , isp 
ORDER BY timestamp DESC 
LIMIT 0,25;

MySQL重新调整空集

Answer 1

在两个查询中，您都将整数与varchar：

进行比较

ip_src = '3305661330'

但ip_src实际上是一个整数（10）无符号。所以试试这个：

ip_src = 3305661330

查询返回空集

1 个答案: