Comparing two SQL tables - php

Question

I am looking to filter results by date, which I gotten to work just fine. Now I'm trying to have the database return values based on each employee in that filtered period. Example in the employee table:
ID Hourly
then in the data table
ID Hours
So I was trying for if the IDs match then look up how much the hourly and hours would total out to. Here's what I have thus far.
<?php
$con=mysqli_connect("MY_INFO.com","USER","*********","DB_NAME");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$data = mysqli_query($con,"Select * FROM employees
Select * FROM data
SELECT t1 *, t2.*
From employees t1
INNER JOIN data t2 on t1.id = t2.id
'");
while($data = mysqli_fetch_array($data)) {
echo $data['id'] . " " . $data['id'];
echo "<br>";
}
$result = mysqli_query($con,"SELECT * FROM friends
WHERE date >'2014-09-1' and date < '2014-9-30'");
while($row = mysqli_fetch_array($result)) {
echo $row['name'] . " " . $row['id'];
echo "<br>";
I'm trying to filter by date, and then match IDs from both tables so if an id equals an id from the other table then it could return an hourly wage. So if employee id: 1 had an hourly wage of $20 / hr and worked 2 hours then I could get it to return $40. The tables would have in them:
Employee:
ID $/hr
1 20
Data:
ID Hours
1 2