How to write multiple SQL query statement and PL/SQL statement inside one PL/SQL statement - sql

Question

In 1 PL/SQL block have to use multiple SELECT query and one block statement. In this block statement we have to take counts before insert query and once insert statement run then after have to take its after_counts of the id value that mentioned below.
set heading off
set colsep '|'
set feedback off
set sqlformat csv
set trimspool on
spool output.txt
declare
ln_rec tab1%rowtype;
lv varchar(20);
sid tab.id%type;
b_cnts number;
a_cnts number;
type sh_id is varray(10) of tab.col1%type;
id sh_id := sh_id(1, 3, 5, 7, 9, 11, 13, 15, 17, 19);
begin
select a.id, count(b.sub_id) into sid, b_cnts as "before_counts" from tab a, tab1 b;
for i in (select distinct b.sub_id from tab a, tab1 b where a.id in (1, 3, 5, 7, 9, 11, 13, 15, 17, 19))
loop
select * into ln_rec from tab1 where sub_id = i.sub_id;
insert into new_tab values(id, i.sub_id, lv);
commit;
end loop;
select a.id, count(b.sub_id) into sid, a_cnts as "after_counts" from tab a, tab b;
end;
spool off
But when i execute it then got error because of above SET system variable summary and in the insert statement due to id. I want output in the csv format or output format like where 3 columns should be generated as id, before_counts, after_counts & its proper value. Like this:-
<id> <before_counts> <after_counts> -- This heading should not appear because above used heading off
1 135 138
3 246 250
5 298 302
7 389 399
.........

Answer 1

Something like this:
DECLARE
type sh_id is varray(10) of tab.col1%type;
a_cnts number;
b_cnts number;
lv varchar2(20) := NULL; -- This is never modified in your code.
ids sh_id := sh_id(1, 3, 5, 7, 9, 11, 13, 15, 17, 19);
BEGIN
FOR i IN 1 .. ids.COUNT LOOP
SELECT count(b.sub_id)
INTO b_cnts
FROM tab a
INNER JOIN tab1 b
ON ( <some join conditions> ) -- you need to specify the join
WHERE a.id = ids(i);
INSERT INTO new_tab
SELECT DISTINCT
ids(i),
b.sub_id,
lv
FROM tab a
INNER JOIN tab1 b
ON ( <some join conditions> ) -- you need to specify the join
WHERE a.id = ids(i);
-- Assuming you have a trigger to populate tab or tab1 from new_tab then
a_cnts := b_cnts + SQL%ROWCOUNT;
-- Otherwise:
SELECT count(b.sub_id)
INTO a_cnts
FROM tab a
INNER JOIN tab1 b
ON ( <some join conditions> ) -- you need to specify the join
WHERE a.id = ids(i);
DBMS_OUTPUT.PUT_LINE( ids(i) || CHR(9) || b_cnts || CHR(9) || a_cnts );
END LOOP;
-- Commit outside the loop
COMMIT;
END;
/