SQLは隣接する行のシーケンスをチェックします

試してみてください

select t1.name, t1.id as id1,t2.id as id2 
from tablename t1, tablename  t2 
where t1.flag = 0 and t2.id = t1.id+1 and t2.flag = 1 and t1.name = t2.name