Question

我正在执行两个查询来构建来自同一数据库中两个表的数据的表。我现在的代码如下，但我知道我正在以这种方式创建一个不必要的负载。我一直试图加入表格以获得相同的结果，但没有运气。有什么输入吗？

<cfquery name="GetWeekends">
   SELECT id, weekend_type, community_id, start_date, end_date, language
   FROM _weekends
   WHERE weekend_type = 1 and start_date > Now()
   ORDER BY start_date ASC
</cfquery>  

<cfloop query="GetWeekends">                
    <cfquery name="GetCommunity">
        SELECT community_id, location, language, state, country
        FROM _communities
        WHERE community_id = #getweekends.community_id#
    </cfquery>                  
    <tr>
        <td>#DateFormat(start_date, "mm/dd/yyyy")#</td>
        <td>#GetComm.location#</td>
        <td>#GetComm.state#</td>
        <td>#GetComm.country#</td>
        <td>#GetComm.language#</td>
   </tr>
</cfloop>

Answer 1

数据库连接非常基础。你应该好好教育自己。

无论如何，看起来你想做这样的事情：

<cfquery name="GetWeekends">
SELECT w.id, w.weekend_type, w.community_id, w.start_date, w.end_date,
  w.language,
  c.community_id, c.location, c.language, c.state, c.country
FROM _weekends w
  INNER JOIN _communities c
    ON w.community_id=c.community_id
WHERE w.weekend_type = 1 and w.start_date > Now()
ORDER BY w.start_date ASC
</cfquery>

在ColdFusion查询中连接表

1 个答案: