Passing table name and columns name as parameters to procedure

Question

i need a procedure that take table name and column names as parameters .
it should display all values in those columns
like
if i execute procedure p ( t1,c1,c2)
it should display c1,c2 values in t1 table
if i execute procedure p ( t1, c1,c2,c3)
it should display c1,c2,c3 values in t1 tables
no of column parameters changes

Answer 1

See if this helps...
First, read the manual on collections.
Second, define your expected results. You want to output the results to the screen? You cannot perform a 'select' in PL/SQL. You will have to select your output into another collection, then loop through that.
Finally, I am curious why this is necessary versus performing a regular query.
Take a look at this incomplete code.
create or replace
package dave_pac
IS
TYPE col_name_list IS VARRAY(20) OF VARCHAR2(30);
PROCEDURE SFA_TAB_COL1
(p_tname  IN    VARCHAR2
,p_cnames IN    col_name_list);
END;
create or replace
package  body dave_pac
IS
PROCEDURE SFA_TAB_COL1
(P_tname  IN varchar2
,p_cnames in col_name_list)
IS
l_stmt long;
l_rc number;
begin
l_stmt :='select '||p_cnames(1);
for i in 2..p_cnames.count
loop
l_stmt :=l_stmt||' , '||p_cnames(i);
end loop;
l_stmt:= l_stmt||' from '|| p_tname ;
execute immediate l_stmt;
end ;
END dave_pac;