CIVILNR i civilståndstabellen

Detta villkor är uppfyllt... ...om denna SQL... ...returnerar ... och eventuell kommentar.
Varje person som har CIVILNR = 15 ska också ha en post där CIVILNR = 14.
Varje person som har CIVILNR = 14 ska också ha en post där CIVILNR = 13. osv.
select count(*)
from K136.CIVILSTAND
where (civilnr = 15 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 14) ) or 
      (civilnr = 14 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 13) ) or 
      (civilnr = 13 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 12) ) or 
      (civilnr = 12 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 11) ) or  
      (civilnr = 11 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 10) ) or 
      (civilnr = 10 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 9) ) or  
      (civilnr = 9 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 8) ) or  
      (civilnr = 8 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 7) ) or  
      (civilnr = 7 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 6) ) or  
      (civilnr = 6 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 5) ) or  
      (civilnr = 5 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 4) ) or  
      (civilnr = 4 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 3) ) or  
      (civilnr = 3 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 2) ) or  
      (civilnr = 2 and 
         ddbid not in (select ddbid from k136.CIVILSTAND 
                         where civilnr = 1) ) 
						 
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