set column with a string into null in coldfusion

[jsungmin]

I have a table which display quest_id,quest_ no, quest_malay, quest_eng and delete. After I click button delete I want to set my table row quest_malay and quest_eng into null.
this is my coding

UPDATE SURVEY_QUESTION 
SET quest_malay = <cfqueryparam cfsqltype="cf_sql_varchar" value="">,
    quest_eng = <cfqueryparam cfsqltype="cf_sql_varchar" value="">
    WHERE QUEST_ID = <cfqueryparam cfsqltype="CF_SQL_NUMERIC" value="#getDelete.QUEST_ID#"

but this code have error..
thanks.

[acoder]

Try

<cfqueryparam ... null="yes">