Shifts now have a position field, that the schedule classes methods are...

Shifts now have a position field, that the schedule classes methods are updated to take positions and return position data.

SchedulerApp/src/main/java/com/example/scheduler_server/Staff.java

 package com.example.scheduler_server;
 
 import java.sql.*;
+import java.util.Locale;
 
 /*
     Name: Staff
@@ -123,6 +124,19 @@ public class Staff {
         return removedPosition;
     }
 
+    protected void removePositionALLEmployee(String position) {
+        try {
+            String positionLowerCase = position.toLowerCase(Locale.ROOT);
+            Statement myStatement = dbConnection.createStatement();
+            ResultSet myRs = myStatement.executeQuery("select * from Employees");
+            while (myRs.next()) {
+                removePosition(Integer.parseInt(myRs.getString("employee_ID")), positionLowerCase);
+            }
+        } catch (Exception exception) {
+            exception.printStackTrace();
+        }
+    }
+
     /*
     Name: printEmployees
     Parameters: none