如何将参数值传递给ColdFusion数据库查询

Question

我编写了一个数据库查询来提取ColdFusion中的信息,我想知道如何将值传递给WHERE子句以获取相关数据.这是我的代码示例.任何人都可以帮忙吗？

<cfquery name="FILM_STRIP_QUERY" datasource="#dsn#">
select   distinct tm.id as teachingmoduleid,
        (select concat(prs.first_name, ' ',prs.last_name) AS Video_presenter from presentations pss
            inner join topics tpcs on tpcs.id = pss.topic_id
            inner join presenters prs on prs.id = pss.presenter_id
            where pss.name = ps.name
            and tpcs.title = tp.title
            ) AS video_presenter,
        (select pss.43_png from presentations pss
            inner join topics tpcs on tpcs.id = pss.topic_id
            inner join presenters prs on prs.id = pss.presenter_id
            where pss.name = ps.name
            and tpcs.title = tp.title) AS png_name
        from teaching_modules  tm 
        inner join tm_segments sg on sg.module_id =  tm.id
        inner join topics tp on tp.id =  sg.topic_id
        inner join presenters prs on prs.id = tm.presenter_id
        left outer  join presentations ps on ps.id = sg.presentation_id
        where tm.id = 
</cfquery>

这是调用函数

<cfloop = "FILM_STRIP_QUERY">
    <!--- this is where I wanna pass the parameter--->
</cfloop>

Answer 1

你的意思是这样的吗？

<cfset tmId = 5 />
<!--- or something like <cfset tmId = url.id /> --->
<cfquery name="FILM_STRIP_QUERY" datasource="#dsn#">
  <!--- SELECT cols FROM wherever etc... --->
  WHERE tm.id = <cfqueryparam cfsqltype="cf_sql_integer" value="#tmId#" />
</cfquery>

您可以在没有CFQueryParam标记的情况下执行#tmid#,但最好使用它来增加安全性(验证),数据库也会缓存执行计划,希望在下次执行查询时提高性能.