Rogerio,
Voce pode fazer o seguinte:
1 . Criar o type string_agg_type
[spoiler]create or replace type string_agg_type as object ( total varchar2(4000),
static function
ODCIAggregateInitialize(sctx IN OUT string_agg_type )
return number,
member function
ODCIAggregateIterate(self IN OUT string_agg_type ,
value IN varchar2 )
return number,
member function
ODCIAggregateTerminate(self IN string_agg_type,
returnValue OUT varchar2,
flags IN number)
return number,
member function
ODCIAggregateMerge(self IN OUT string_agg_type,
ctx2 IN string_agg_type)
return number
);
/
Type created.
create or replace type body string_agg_type
is
static function ODCIAggregateInitialize(sctx IN OUT string_agg_type)
return number
is
begin
sctx := string_agg_type( null );
return ODCIConst.Success;
end;
member function ODCIAggregateIterate(self IN OUT string_agg_type,
value IN varchar2 )
return number
is
begin
self.total := self.total || ‘,’ || value;
return ODCIConst.Success;
end;
member function ODCIAggregateTerminate(self IN string_agg_type,
returnValue OUT varchar2,
flags IN number)
return number
is
begin
returnValue := ltrim(self.total,’,’);
return ODCIConst.Success;
end;
member function ODCIAggregateMerge(self IN OUT string_agg_type,
ctx2 IN string_agg_type)
return number
is
begin
self.total := self.total || ctx2.total;
return ODCIConst.Success;
end;
end;
/
Type body created.[/spoiler]
- Criar a função para fazer a agregação:
[spoiler]CREATE or replace
FUNCTION stragg(input varchar2 )
RETURN varchar2
PARALLEL_ENABLE AGGREGATE USING string_agg_type;
/
Function created.
[/spoiler]
3.Usar a funçao:
select stragg(nome||’ ‘||tipo) from clientes where cidade=xx;
Essa dica eu peguei no site do AskTom. Achei muito bacana.
Boa sorte,
Vanessa