SQL Oracle get the all columns of a cursor to use in a insert into - sql

Question

I want to create a procedure in which I use a cursor to select certain lines and then insert them in another table. I wonder if there is a notation to write it faster.
For instance here is the complete procedure
create or replace procedure myProc as
Cursor lines is
select * from table1 where c = '2';
begin
for line in lines loop
insert into table2 values(line.a, line.b, line.c, line.d ....);
end loop;
end;
/
I want to know if I can replace the 'insert into' line by something like
insert into table2 values(line.something);
or
insert into tables2 values(something(line));
(I think a view could be more effective but it's not the question here.)

Answer 1

Absolutely:
create or replace procedure myProc as
begin
insert into table2( . . .)
select a, b, c, d, . .
from table1
where c = '2';
end;
/
You should list the columns in table2 as well. That is what the table2( . . . ) means.

Answer 2

Despite the following code should work in case structure of both tables were identical...
INSERT INTO target_table
SELECT * FROM source_table;
... you should avoid this way of programming because any column addition to source or target table will end in SQL became invalid.

Answer 3

Looks like you're looking for a short-cut in order to avoid qualifying column names in an insert statement.
Well, although I do not recommend this, it can be done bug it's a little tedious. Here is an example:
if you have a table employee (employee_id, employee_name, designation). You'll need to create two types in the database-
a. An object type which is similar to employee-
create type employee_obj as object (employee_id number(28,0),
employee_name varchar2(100),
designation varchar2(30));
b. Create the set type of this record-
create type employee_obj_set is table of employee_obj;
c. In your PL/SQL procedure you can use something like:
DECLARE
empset employee_obj_set;
-- More variables here
BEGIN
-- other operations
-- populate your empset
-- other operations
INSERT INTO employee
SELECT * FROM table(empset);
-- other operations
END;
/

Answer 4

For faster inserts use bulk collect/FORALL insert instead of singular inserts.Find below sample...
DECLARE
CURSOR lines is select * from table1 where c = '2';
type lines_ty is table of table2%rowtype;
l_lines_t2 lines_ty;
BEGIN
OPEN lines;
LOOP
FETCH lines BULK COLLECT INTO l_lines_t2 LIMIT 500;
FORALL i IN 1..l_lines_t2.COUNT
INSERT INTO table2 VALUES l_lines_t2(i);
EXIT WHEN lines%NOTFOUND;
END LOOP;
CLOSE lines;
END;