How could you auto-increment a number in a select

Question

i have some select sentences that i think i could do in one line:
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0001)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0001 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0002)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0002 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0003)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0003 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0004)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0004 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0005)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0005 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0006)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0006 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0007)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0007 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0008)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0008 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0009)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0009 AND F_PAGADO IS NULL;
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = 0010)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO = 0010 AND F_PAGADO IS NULL;
note that only the number changes. i would need it to go through EVERY row from table "RECIBO". please, some idea? thanks!
Edited by: user13475720 on 01-mar-2011 3:17

Answer 1

hi there
create s sequence
CREATE SEQUENCE scott.SEQ
  START WITH 1
  MAXVALUE 99
  MINVALUE 1
  NOCYCLE
  NOCACHE
  NOORDER;then put seq.nextval
in ur query
UPDATE RECIBO SET RECARGO = (SELECT FLOOR((SELECT MONTHS_BETWEEN (SYSDATE , (SELECT F_EMISION FROM RECIBO WHERE N_RECIBO = SEQ.NEXTVAL)) / 12 FROM DUAL)) FROM DUAL) WHERE N_RECIBO =  SEQ.NEXTVAL AND F_PAGADO IS NULL;Regards
Hitesh