在SQL中的select语句中按字段排序

Question

我需要创建一个仅提取customer_no列的查询（因为软件限制本身如此，因此我无法在外部进行编码）。但是我需要能够通过create_dt（相反）列对数据进行排序。代码/ SQL限制了我使用以下内容，因为为了对某些数据进行排序，必须将这些数据显示在select语句中。

我无法在其中显示它-有什么办法解决吗？

 Select Distinct top 3500 a.customer_no 
  From T_CUSTOMER a  WITH (NOLOCK)
  JOIN (Select a1.customer_no From VXS_CUST_TKW a1 WITH (NOLOCK) Where a1.tkw in (141)) as e ON      e.customer_no = a.customer_no
  Where 1 = 1
 order by a.create_dt desc

Answer 1

当然可以。您的查询看起来像SQL Server，在其中可能会执行您想要的操作：

  Select top 3500 a.customer_no 
  From T_CUSTOMER a  WITH (NOLOCK) JOIN
       (Select a1.customer_no
        From VXS_CUST_TKW a1 WITH (NOLOCK)
        Where a1.tkw in (141)
       ) e
       ON e.customer_no = a.customer_no
  Where 1 = 1
  group by a.customer_no
  order by max(a.create_dt) desc;

MySQL中的等效查询如下所示：

  Select a.customer_no 
  From T_CUSTOMER a JOIN
       (Select a1.customer_no
        From VXS_CUST_TKW a1 
        Where a1.tkw in (141)
       ) e
       ON e.customer_no = a.customer_no
  Where 1 = 1
  order by a.create_dt desc
  limit 3500;

我删除了，distinct因为可能没有必要。如果是，请重新添加。