SQL count(*) return a wrong result

Question

Hi all, i've got 2 table F_1 and F_2. I also have a view VW based on the previous table that create the join clause.
If i execute
select * from
F_1   F_1,
VW VW,
F_2 F2
where
F_1.SEQ_LINE = VW.LINEA
AND
TO_NUMBER(VW.TESTA) = TO_NUMBER(F_2.SEQ_LINE)
i obtain 506 rows (the correct result). If i execute
select count(*) from
F_1   F_1,
VW VW,
F_2 F2
where
F_1.SEQ_LINE = VW.LINEA
AND
TO_NUMBER(VW.TESTA) = TO_NUMBER(F_2.SEQ_LINE)
the result is 0. Any idea?
Thanks, DecaXD

Answer 1

Hi all, TO_NUMBER was a copy paste error.
The table (dummy data) is
CREATE TABLE "F1"
(     "C1" VARCHAR2(5),
     "SEQ_LINE" NUMBER(8,0)
-- Records of F1
INSERT INTO "F1" VALUES ('aaa', '1');
INSERT INTO "F1" VALUES ('bbb', '4');
INSERT INTO "F1" VALUES ('ccc', '6');
CREATE TABLE "D2"
(     "C1" VARCHAR2(5),
     "SEQ_LINE" NUMBER(8,0)
-- Records of F2
INSERT INTO "F2" VALUES ('aaa1', '2');
INSERT INTO "F2" VALUES ('aaa2', '3');
INSERT INTO "F2" VALUES ('bbb1', '5');
INSERT INTO "F2" VALUES ('ccc1', '7');
The view is
select F2.SEQ_LINE LINEA ,max(F1.SEQ_LINE) TESTA from F1,F2
where F2.SEQ_LINE > F1.SEQ_LINE
group by F2.SEQ_LINE
ORDER BY 1,2