Ajax Issues on Input field

Hi Team,

I have a one issues when I am using the Ajax Subform. 

Problem:

Input text : Enter the project number on the based on project number populate the values in the dropdown list.

Select Box: Populate the list of values once enter the value , input project number field

Using the JDBC binder for retrieve the data under ajax Subform.

Query: I was trying to use the below query but it is not working

1.  Select c_projectnumber, ipa_number from app_fd_ipadetails where c_projectnumber=#form.ipadetails.projectnumber#  
2.  Select c_projectnumber, ipa_number from app_fd_ipadetails where c_projectnumber=?  

Please guide me how to retrieve the details