text: 
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-1' ) where boundarytype in (select id from eg_boundary where name = 'Revenue Ward No 1' );
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-2' ) where boundarytype in (select id from eg_boundary where name = 'Revenue Ward No 2' );
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-3' ) where boundarytype in (select id from eg_boundary where name = 'Revenue Ward No 3' );
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-4' ) where boundarytype in (select id from eg_boundary where name = 'Revenue Ward No 4' );
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-1' ) where boundarytype in (select id from eg_boundary where name = 'Revenue');
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-2' ) where boundarytype in (select id from eg_boundary where name = 'Revenue Ward: 6');
  update eg_boundary set parent = (select id from eg_boundary where name = 'Zone-3' ) where boundarytype in (select id from eg_boundary where name = 'Gandhi Road');