Question

The are many questions with this same title but I can’t find an answer among those.

What am I doing wrong?

CREATE TABLE J
    (A integer)
;

INSERT INTO J (A)
VALUES
    (1),
    (2),
    (3),
    (4),
    (5),
    (6),
    (7),
    (8),
    (9),
    (10)
;

The create alone works. The problem is just the insert. I tried in SQL Fiddle.

Answer 1

You can do it several ways (See SQL Fiddle with Demo):

INSERT ALL 
    INTO J (A) VALUES (1)
    INTO J (A) VALUES (2)
    INTO J (A) VALUES (3)
    INTO J (A) VALUES (4)
    INTO J (A) VALUES (5)
    INTO J (A) VALUES (6)
    INTO J (A) VALUES (7)
    INTO J (A) VALUES (8)
SELECT * FROM dual
;

Or (See SQL Fiddle With Demo):

INSERT INTO J (A)
select  (1) from dual union all
select  (2) from dual union all
select  (3) from dual union all
select  (4) from dual union all
select  (5) from dual union all
select  (6) from dual union all
select  (7) from dual union all
select  (8) from dual union all
select  (9) from dual union all
select  (10) from dual

Or even separate INSERT statements for each one:

INSERT INTO J (A) VALUES (1);
INSERT INTO J (A) VALUES (2);
INSERT INTO J (A) VALUES (3);
INSERT INTO J (A) VALUES (4);
INSERT INTO J (A) VALUES (5);
INSERT INTO J (A) VALUES (6);