SQL查詢通過給出錯誤的順序

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))"; 

我正在使用此查詢進行訪問，它工作正常，但不適用於在Order by附近給出語法錯誤的sql。

Answer 1

在sql中，所有派生表都必須是別名。注：將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))" 

編輯

除非RND是一個自定義功能，你可能想RAND