错误：ORDER BY 子句在视图、内联函数、派生表、子查询和公用表表达式中无效答案

【问题标题】：Errors: The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions错误：ORDER BY 子句在视图、内联函数、派生表、子查询和公用表表达式中无效
【发布时间】：2021-08-30 16:33:20
【问题描述】：

以下是我的查询，它给了我 OrderBy 错误。我试图寻找解决方案，但它们都不起作用。请帮助我了解这里可能出了什么问题。

P.S：这是在 Salesforce Marketing Cloud 中

SELECT RIGHT(email_address, LEN(email_address) - CHARINDEX('@', email_address)) as domain,
COUNT(email_address) as domain_count
FROM   MY_DE
WHERE  LEN(email_address) > 0
GROUP BY RIGHT(email_address, LEN(email_address) - CHARINDEX('@', email_address))
ORDER BY domain_count DESC

【问题讨论】：

此查询没有 CTE 或子查询或内联函数，它没有创建视图。你有什么遗漏的吗？
在salesforce.stackexchange.com，特别是marketing-cloud 和query 标签，您将获得更多关注您的SFMC 问题。

标签： sql salesforce-marketing-cloud

【解决方案1】：

您可以将查询包装到另一个选择语句中，然后您可以通过以下方式应用订单：

SELECT domain, domain_count
From (
   SELECT RIGHT(email_address, LEN(email_address) - CHARINDEX('@', email_address)) as domain,
   COUNT(email_address) as domain_count
   FROM   MY_DE
   WHERE  LEN(email_address) > 0
   GROUP BY RIGHT(email_address, LEN(email_address) - CHARINDEX('@', email_address))
) TableName
ORDER BY domain_count DESC

【讨论】：

谢谢，但现在它给了我这个错误：保存查询字段时出错。关键字“ORDER”附近的语法不正确。
我想要子查询的表名（我已经在答案中更正了 SQL）

【解决方案2】：

在 SFMC 中，有一个技巧可以让 order-by 子句发挥作用——只需添加 top 100 percent：

SELECT top 100 percent
  x.domain
, x.domain_count
From (
   SELECT 
     RIGHT(email_address, LEN(email_address) - CHARINDEX('@', email_address)) as domain
   , COUNT(*) as domain_count
   FROM MY_DE
   WHERE 
   isnull(email_address,'') != ''
   GROUP BY 
   RIGHT(email_address, LEN(email_address) - CHARINDEX('@', email_address))
) x
ORDER BY x.domain_count DESC

【讨论】：