Calling a function from a select

Question

Hi, I'd like to know, from a select, how can I call a function which has in input more than one values (for example all the cities).
For example from this select I retrieve:
SELECT STORE.CITY ,LENGTH(STORE.CITY) FROM VIDEO5.STORE STORE
CITY                           LENGTH(STORE.CITY)
New York                                        8
Atlanta                                         7
Los Angeles                                    11
San Francisco                                  13
Pittsburgh                                     10
New Orleans                                    11
Seattle                                         7
Dallas                                          6
Cincinnati                                     10
Minneapolis                                    11
Louisville                                     10
CITY                           LENGTH(STORE.CITY)
Phoenix                                         7
Denver                                          6
St. Louis                                       9
Washington                                     10
Miami                                           5
Boston                                          6
Nashville                                       9
Chicago                                         7
Philadelphia                                   12
20 rows selected. Now, if I want to know also the Store Name, for each city, I need to call a function (STATISTIC_REPORT_2) which retrieves for each city the Store Name,.....but I don't know how to pass the "city parameter" inside the function.
So....in this way
SELECT LENGTH(STORE.CITY), STORE.CITY, test.STATISTIC_REPORT_2(STORE.CITY)
FROM VIDEO5.STORE STORE
I have the following error: ORA-06553: PLS-306: wrong number or types of arguments in call to 'STATISTIC_REPORT_2'
Before I define a type as:
create type Tot_Tks_Created_type is table of varchar2(200);
and the function is
FUNCTION STATISTIC_REPORT_2 (p_ypiresia Tot_Tks_Created_type)
return Tot_Tks_Created_type
IS
Tot_Tks_Created Tot_Tks_Created_type; VARCHAR2(200); Tot_Tks_Created_type;
begin
select store_name bulk collect into Tot_Tks_Created from store;
return Tot_Tks_Created;
end;
Anyone knows the correct syntax or where I make a mistake ?
Thanks in advance
Alex

Answer 1

There's nothing technically wrong with having more than one store per city especially when you are returning a table type as originally specified by the OP:
drop table stores
drop table stores succeeded.
create table stores as (select 1 id, 'Seattle' City, '5th Ave Deli' Store_name from dual
  union all select 2, 'Seattle', '13th St Gas-n-Go' from dual
  union all select 3, 'Seattle', 'Convention Center Lemon Juicer' from dual
  union all select 4, 'Portland', 'Bagle Bistro' from dual
  union all select 5, 'Portland', 'Lime Time' from dual
  union all select 6, 'Tacoma', 'Taco Hut' from dual)
create table succeeded.
create or replace type varchar200_tt is table of varchar2(200);
type varchar200_tt Compiled.
create or replace function city_stores(city_list varchar200_tt) return varchar200_tt as
  store_list varchar200_tt;
begin
  select s.store_name bulk collect into store_list
  from stores s
  where city in (select column_value from table(city_list));
  return store_list;
end;
function city_stores(city_list Compiled.
select city, city_stores(varchar200_tt(city))
from (select distinct city from stores)
CITY     CITY_STORES(VARCHAR200_TT(CITY))                                      
Portland VARCHAR(Lime Time,Bagle Bistro)                                       
Seattle  VARCHAR(Convention Center Lemon Juicer,13th St Gas-n-Go,5th Ave Deli) 
Tacoma   VARCHAR(Taco Hut)                                                     
3 rows selected