Iterate through all rows in table PL/SQL - oracle

Question

From table1 I would like to gather values from certain columns. First of all I have tried to copy one table to another but I stuck when tried to:
for row in row_count
for column in column_count
insert into table2 at (x,y) value from (row,column)
column++
end
row++
end
My first function to count how many rows is:
create or replace FUNCTION func_count_rows(table_name IN varchar2,
debug boolean default false)
RETURN number IS
total number(2) := 0;
BEGIN
IF debug = true THEN
DBMS_OUTPUT.put('Function count rows: ');
DBMS_OUTPUT.PUT_LINE('select count(*) from ' || table_name || ';');
DBMS_OUTPUT.put('Returns: ');
DBMS_OUTPUT.PUT_LINE('');
END IF;
execute immediate 'select count(*) from ' || table_name into total;
RETURN total;
END;
Then my procedure to first print values but I stuck here:
create or replace procedure gather_values (rows_quantity in VARCHAR2,
column_count in VARCHAR2,
debug boolean default false
)
is begin
select
FOR i IN 1..rows_quantity LOOP
DBMS_OUTPUT.PUT_LINE('#### ROW 1 ####');
FOR i IN 1..94 LOOP
END LOOP;
END LOOP;
end;
I don't know how to get column quantity and value from exact (x,y) of table.
Could you kindly help me? Thank you.
I have forget to tell that I'm using oracle SQL enviroment.

Answer 1

First of all, this has nothing in common with PL/SQL:
for row in row_count
for column in column_count
insert into table2 at (x,y) value from (row,column)
column++
end
row++
end
See documentation here.
To copy all rows from one table to another:
insert into table2 (x,y)
select a, b
from table1;
It is a simple SQL query, it can be used as is or inside a PL/SQL procedure.
There is a lot of possibilities to iterate all rows of a table. The most simple:
for i in (select column1, column2, ... from table1) loop
dbms_output.put_line(i.column1);
end loop;
Another ways:
Using cursors
Using collections
Using dynamic SQL and dbms_sql package
To count rows in a table, you can use SQL query:
select count(*)
from table1
or almost the same PL/SQL code (you don't need to use execute immediate):
declare
total number;
begin
select count(*)
into total
from table1;
dbms_output.put_line('count of rows: ' || total);
end;
/
But in any case you don't need to know, how many rows and columns a table contains, to iterate them. You need only to know, how to filter, which of them you want to iterate.