Hi, I need to create a view using hierarchical structure. Let me explain how is designed the table and what's the expected result. TABLE: coo_nro integer coo_nro_father integer level integer DATA: 100 – null – 1 106 – null – 1 134 – 100 – 2 725 – 100 – 2 635 – 106 – 2 423 – 134 – 3 814 – 725 – 3 EXPECTED RESULT: 100 - 1 134 – 2 423 – 3 725 – 2 814 – 3 106 – 1 635 – 2 . . . so on Basically, my result should be this way, not necessary spaces, but sorted by hierarchic. Is this possible on Postgres? Could you help me? _______________________________________________________ Yahoo! Mail - Sempre a melhor opção para você! Experimente já e veja as novidades. http://br.yahoo.com/mailbeta/tudonovo/