PL/SQL insert nested table value into another nested table.

Question

Hi Guy
I've created a table with nested table in and inserted some values. note: this is just an example the real table has more values inserted.
REATE OR REPLACE TYPE tt_hours AS OBJECT(hours INTEGER, data NUMBER);
CREATE OR REPLACE TYPE tt_day AS VARRAY(7) OF tt_hours;
CREATE TABLE old_table
DAY DATE,
VALUE_hours tt_day
INSERT INTO old_table
(day, value_hours)
VALUES
(TO_DATE('01/06/2012 22:00:34'),
tt_DAY(
tt_hours(1,0.025727),
tt_hours(2,0.012047),
tt_hours(3,0.012857),
tt_hours(4,0.012107),
tt_hours(5,0.012849),
tt_hours(6,0.01215),
tt_hours(7,0.0129)))
I've also created another table with same structure but with no value inserted.
REATE OR REPLACE TYPE yy_hours AS OBJECT(thours INTEGER, tdata NUMBER);
CREATE OR REPLACE TYPE yy_day AS VARRAY(7) OF yy_hours;
CREATE TABLE new_table ( tDAY DATE, VALUE_thours yy_day )
I run a select from statement which workout the average of data from old table by group.
SELECT to_char(DAY, 'Day'), hours, AVG(data)
FROM old_table n, TABLE(n.value_hours) v
GROUP BY to_char(DAY, 'Day'), hours;
How do I insert the result in new_table's ?

Answer 1

I believe I said
>
You basically need to construct the INSERT statement just like you did manually for the first table.
>
and instead you used
INSERT INTO new_table a (tday, t.hours, t.DATA) TABLE(a.value_thours) t This is what you did manually for the first table. Do you see TABLE (...) in here anywhere?
INSERT INTO old_table
(day, value_hours)
VALUES
(TO_DATE('01/06/2012 22:00:34'),
tt_DAY(
tt_hours(1,0.025727),
tt_hours(2,0.012047),
tt_hours(3,0.012857),
tt_hours(4,0.012107),
tt_hours(5,0.012849),
tt_hours(6,0.01215),
tt_hours(7,0.0129)))NO YOU DON'T - you used a tt_DAY constructor for the outer nested table and multiple tt_hours constructors for the inner nested table.
You need to do the same thing in your INSERT query.