How to Count number of rows

Question

Hi All
If I have 2 tables with records in it, with primary Table A and Foreign key Table B structure.Then how to count the no of occurances of each records of table A in table B and print the values.
Thanx

Answer 1

Hi,
If I understood you can a query like this:
SGMS@ORACLE10> create table a (cod number);
Table created.
SGMS@ORACLE10> create table b (cod number,id number);
Table created.
SGMS@ORACLE10> alter table a add constraint pk_a primary key (cod);
Table altered.
SGMS@ORACLE10> alter table b add constraint fk_b_a foreign key (cod) references a;
Table altered.
SGMS@ORACLE10> insert into a values (1);
1 row created.
SGMS@ORACLE10> insert into a values (2);
1 row created.
SGMS@ORACLE10> insert into a values (3);
1 row created.
SGMS@ORACLE10> insert into b values (1,1);
1 row created.
SGMS@ORACLE10> insert into b values (1,2);
1 row created.
SGMS@ORACLE10> insert into b values (1,3);
1 row created.
SGMS@ORACLE10> insert into b values (2,1);
1 row created.
SGMS@ORACLE10> insert into b values (3,1);
1 row created.
SGMS@ORACLE10> insert into b values (3,2);
1 row created.
SGMS@ORACLE10> commit;
SGMS@ORACLE10> select b.cod,count(*) from b,a where a.cod = b.cod group by b.cod;
       COD   COUNT(*)
         1          3
         2          1
         3          2
SGMS@ORACLE10>Cheers