SQL查询通过给出错误的顺序

Question

"select top 5 db_statesid 
    from seo_states 
    where db_statesid in (" + 
      "SELECT TOP 5 db_statesid 
       FROM (SELECT DISTINCT a.db_statesid 
         FROM seo_states a 
         where country_id=" + country_id + ") 
       ORDER BY RND(db_statesid))"; 

我正在使用此查询进行访问，它工作正常，但不适用于在Order by附近给出语法错误的sql。

Answer 1

在sql中，所有派生表都必须是别名。注：将t1前ORDER BY

"select top 5 db_statesid 
    from seo_states 
    where db_statesid in (" + 
      "SELECT TOP 5 db_statesid 
       FROM (SELECT DISTINCT a.db_statesid 
         FROM seo_states a 
         where country_id=" + country_id + ") t1 
       ORDER BY RND(db_statesid))" 

编辑

除非RND是一个自定义功能，你可能想RAND