Mysql 使用Distinct返回重复的值。如何避免这种情况？

查询：

结果:

  select distinct (Customer) ,CustomerID from history where Customer != '' and        Customer LIKE 'Ram%';

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尝试使用

MAX

和

group by

      Ramer ram100
      Raman ra45
      Raman ra45

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如果您还想查看所有客户ID，请使用

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@kurya:customerID也是字符串数据类型。没关系。顺便说一下，更清楚的是，您可以添加具有所需结果的示例记录。

 select Customer, MAX(CustomerID) CustomerID
 from   history
 where  Customer != '' AND Customer LIKE 'Ram%'
 GROUP BY Customer 

select customer, group_concat(distinct customerid)
from history
where Customer != '' and Customer like 'Ram%'
group by customer