select a value in dropdown list from two database tables - php

Question

I want to edit the employees's information in a dropdown list, I have two database tables where there is a shared field :
in table1, I have many fields and one of them is the employee Position which is a number. in table2 I have two fields: EmpPos(which is equal to Position in table1) and PosName.
Now, in the dropdown list, when I add a new employee I fill the list with PosName from table2 but store Position number in table1.
the problem is in the edit form, I print all employee's info from table1 in the form to edit them but I don't know how to select employee's PosName from its associated Position in the dropdown list
here is my code:
echo" <b>Position: </b> <select name='Position' >";
$sql="SELECT * FROM table1 LEFT JOIN table2 ON table1.Position = table2.EmpPos";
$result = $conn->query($sql);
if ($result->num_rows > 0)
{
while($row = $result->fetch_assoc()) {
$PosName=$row["PosName"];
$Id=$row['EmpPos'];
echo" <option name= '$PosName' value='$PosName' ' . (($Id==$Position) ? 'selected' : '') . '>$PosName</option>";
}
}
thanks

Answer 1

Write query to get all position from position table:
$sql="SELECT * FROM positionTable order by position name asc";
$result = $conn->query($sql);
$Empquery = "Fetch all data related to that employee.";
echo" <b>Position: </b> <select name='Position' >";
if ($result->num_rows > 0)
{
while($row = $result->fetch_assoc()) {
$PosName=$row["PosName"];
$Id=$row['EmpPos']; //it must emp's position id fetch from other query.
echo" <option name= '$PosName' value='$PosName' ' . (($Id==$Position) ? 'selected' : '') . '>$PosName</option>";
}
}
echo "</select>";