Error executing query, using ajax? - coldfusion

Question

I'm updating a query using a form and ajax.
I added a new column (select option) to the form, it work before adding the select option.
I'm trying to get the value of the #dept_id# but i keep getting error
'NetworkError: 500 Error Executing Database Query'.
This has to do with the update query I have in delete_record.cfc.
when adding dept=#selectDept# to the query is when i get the error.
Taking this part off the query works and it updates.
Below its the form and after that its the delete_record.cfc file.
I also made a http://jsfiddle.net/6focvy54/4/
where I poster the ajax call and have the delete_record.cfc file code.
<form method="post" action="" id="confrm_key">
<table >
<tr>
<th >Add?</th>
<th >Delete?</th>
</tr>
<cfoutput query="total">
<tr id="hd#emp_id#">
<td>
<select name="selectDept" >
<option selected="selected" >Select Department</option>
<cfloop query="department">
<option value="#dept_id#">#dept_name#</option>
</cfloop>
</select>
</td>
<td> <input type="checkbox" name="check_delete" value="#emp_id#" >Yes</td>
</tr>
</cfoutput>
</table>
<p><input type="button" name="Submit" value="Remove" onclick="sub_keys();"></p>
</form>