How to pass a variable to SQL query on AppMaker?

问题:

I have to query some data from BigQuery. The code looks like this:

function GetQuery(employeeId) {
 var projectId = 'xxxx-xx-xxx';
   var request = {
     query: 'SELECT HOD_Email ' +
            'FROM [xxxx-xx-xxx.table_name.dataset] ' +
            'WHERE EmployeeId = employeeId'
   };
 }

And I don't think it works