


DELETE FROM speeds s
USING speeds ss 
WHERE s.ctid < ss.ctid
AND ss.value = s.value;


DELETE FROM brands s
USING brands ss 
WHERE s.ctid < ss.ctid
AND ss.name = s.name;


DELETE FROM download_limits s
USING download_limits ss 
WHERE s.ctid < ss.ctid
AND ss.value = s.value;



DELETE FROM models s
USING models ss 
WHERE s.ctid < ss.ctid
AND ss.name = s.name;
