You can use the analogue tForeach component, and set the ID's values inside it. After that, you should connect the iterate output and reference the current value with the variable ((String)globalMap.get("tForeach_1_CURRENT_VALUE"))
where the tForeach_1
is the name of your tForeach component.
And set the Query to something like:
"select id, name from employee
where id="+((String)globalMap.get("tForeach_1_CURRENT_VALUE"))