Question

This is my current statement without join

$s1 = "SELECT * 
      FROM states
      WHERE 
      statecode='".intval($getStateCode)."'
      "; 

$s2 = "SELECT * 
      FROM county 
      WHERE 
      statecode='".intval($getStateCode)."' 
      AND 
      countycode='".intval($getCountyCode)."'
      "; 

$s3 = "SELECT * 
      FROM town 
      WHERE 
      statecode='".intval($getStateCode)."'
      AND
      countycode='".intval($getCountyCode)."' 
      AND 
      towncode='".intval($getTownCode)."'"; 

$s4 = "SELECT * 
      FROM villages 
      WHERE 
      statecode='".intval($getStateCode)."'
      AND
      countycode='".intval($getCountyCode)."' 
      AND 
      towncode='".intval($getTownCode)."' 
      AND 
      villagecode='".intval($getVillageCode)."'"; 

It’s possible to join all of my tables in one statement? Let me know.

Answer 1

<?php
$query = "SELECT *
FROM state s 
JOIN county c ON s.statecode = c.statecode
JOIN town t ON s.statecode = t.statecode AND c.countycode = t.countycode
JOIN villages v ON s.statecode = v.statecode AND c.countycode = v.countycode AND t.towncode = v.towncode
WHERE 
      s.statecode='".intval($getStateCode)."'
      AND
      c.countycode='".intval($getCountyCode)."' 
      AND 
      t.towncode='".intval($getTownCode)."' 
      AND 
      v.villagecode='".intval($getVillageCode)."'";