Restful Data Serice - multiple parameters

Question

Hello,
               I have some problems with RESTful web services and especially with finding tutorials or videos on this topic explaining more than simple one-parameter-get services.
I have studied the simple one-parameter-get service explained in Oracle documentaton (oracle.example.hr) and I test the template employees/{id} with the handler GET that works fine..
Now I want to modify the query. I want to filter the employees for the columns depno and sal, so I need two parameters.
Here is what I have done:
1) modify query in "select * from emp  where deptno = :id and sal = :s" ;
2) modify "Source Type" from "Query on row" to "Query";
3) add a new parameter named s;
Now I have a question: which is the correct URI Template that I have to insert? I have tried with emplyees/{id, s}, emplyees/{id},{s}, emplyees/{id}/employees/{s} and many other but it doesn't work.
I set the bind variables with the values 20 (id) e 800 (s). The result the I aspect is the JSON of the employee SMITH but I see only {items: [ ] }
In my browser I see this adress: "http://localhost:8080/ords/gt/hr/employees/20%7Bs%7D". The first variable is correctly binded into 20 but the second isn't binded.
Other question about the oracle.example.hr: in the query of the template empsec/{empname} is used twice the variable :empname but there isn't the corresponding bind variable. Why? When is necessary use bind variables?
Thanks in advance.
Federico

Answer 1

Thanks Vlad for your answer.
I followed your suggestion and I manually replaced the second parameter with its values in the address but it doesn't work, the result is the same {items: [ ] } .
This is the address that I have in my browser http://localhost:8080/ords/gt/hr/employees/20/employees/800 and my Uri Template is employees/{id}/employees/{s}.
What am I doing wrong?
Thanks,
Federico