Improve UNIQUE constraint of table, to make it easier to issue REPLACE INTO instructions

central_db.sql.php

@@ -1,13 +1,14 @@
 USE NETWORK;
 DROP TABLE IF EXISTS mDNS;
 CREATE TABLE mDNS (
- id INT PRIMARY KEY AUTO_INCREMENT,
  Host VARCHAR(255) NOT NULL,
  Type ENUM('A','PTR','SRV') NOT NULL,
  Name VARCHAR(255),
- Data VARCHAR(1024)
+ Data VARCHAR(1024),
+ PRIMARY KEY (Host,Type,Name)
 );
 
+
 <?php
 $hosts = [
     ["hostname" => "hostname01", "password" => "password01"],