Return N columns from a table function - oracle

Question

I need to implement a table function, which I will submit a request with an unknown number of columns. It looks like:
SELECT * from TABLE (function())
where function, for example'SELECT x, y FROM z. I don't know how do this, so I'd like to hear some sort of way to solve, just as an idea.

Answer 1

I think what you are asking is you are getting multiple rows in the o/p when you are using
the function in select statement .
if i create a function as follows:
create or replace function get1job
(id in varchar2)
return varchar2 is
tittle jobs.JOB_TITLE%type;
begin
select job_title into tittle from jobs where job_id=id;
return tittle;
end get1job;
and use it in select statement .
i will write :
select get_job('AD_PRES') from dual;
i will get only one row
if i write :
select get_job('AD_PRES') from jobs;
the number of rows displayed will be equal to the number of rows in the table jobs.

Answer 2

Here is an example for a fully dynamic SQL, you can insert any SELECT statement and it prints out a corresponding HTML:
CREATE OR REPLACE PROCEDURE HtmlTable(sqlStr IN VARCHAR2) IS
cur INTEGER := DBMS_SQL.OPEN_CURSOR;
columnCount INTEGER;
describeColumns DBMS_SQL.DESC_TAB;
res INTEGER;
c INTEGER;
aCell VARCHAR2(4000);
BEGIN
DBMS_OUTPUT.PUT_LINE('<table>');
DBMS_SQL.PARSE(cur, sqlStr, DBMS_SQL.NATIVE);
DBMS_SQL.DESCRIBE_COLUMNS(cur, columnCount, describeColumns);
DBMS_OUTPUT.PUT_LINE('<thead><tr>');
FOR i IN 1..columnCount LOOP
DBMS_OUTPUT.PUT_LINE(' <td>'||describeColumns(i).COL_NAME||'</td>');
DBMS_SQL.DEFINE_COLUMN(cur, i, aCell, 4000);
END LOOP;
DBMS_OUTPUT.PUT_LINE('</tr></thead>');
res := DBMS_SQL.EXECUTE(cur);
DBMS_OUTPUT.PUT_LINE('<tbody>');
WHILE (DBMS_SQL.FETCH_ROWS(cur) > 0) LOOP
DBMS_OUTPUT.PUT_LINE('<tr>');
c := 1;
WHILE (c <= columnCount) LOOP
DBMS_SQL.COLUMN_VALUE(cur, c, aCell);
DBMS_OUTPUT.PUT_LINE(' <td>'||aCell||'</td>');
c := c + 1;
END LOOP;
DBMS_OUTPUT.PUT_LINE('</tr>');
END LOOP;
DBMS_OUTPUT.PUT_LINE('</tbody>');
DBMS_OUTPUT.PUT_LINE('</table>');
DBMS_SQL.CLOSE_CURSOR(cur);
END HtmlTable;
Use this as a base for your application. Then you can execute it like this:
BEGIN
HtmlTable('SELECT x, y FROM z');
END;