CAST and MULTISET with nested table

Question

I am trying to figure out the syntax of using
MULTISET. I have two queries.
One very basic where I want to cast the station names
and ids, retrieved from a regular table into a nested
table.
e.g.
SELECT cast(multiset(stn_id, stn_name) as castTab) FROM station_tab WHERE stn_name like '%xyz%';
The other retrieve sections of a nested table and cast back as
nested table type.
SELECT * FROM CAST(MULTISET(SELECT * FROM
THE (SELECT tmn_history FROM tmin WHERE tmn_stn_ncdcid = 01063456) NT
WHERE (EXTRACT(YEAR FROM NT.dta_date) = 1915) AS data_tab ;
The schema/tables are as follows
=========================================================================
CREATE TABLE station_tab
     stn_id     INTEGER PRIMARY KEY,
     stn_name VARCHAR(50)
CREATE OR REPLACE TYPE data_point AS OBJECT
     dta_date      DATE,
     dta_val NUMBER,
     dta_dtobtnd DATE
CREATE OR REPLACE TYPE data_tab AS TABLE OF data_point;
CREATE TABLE tmin
tmn_stn_id     INTEGER ,
tmn_history data_tab
) NESTED TABLE tmn_history STORE AS tmn_history_tab;
CREATE OR REPLACE TYPE castObj AS OBJECT
     dta_val NUMBER,
     stn_name VARCHAR(50)
CREATE OR REPLACE TYPE castTab AS TABLE OF castObj;
=====================================================================
Thank you.
barr

Answer 1

With trial and error and going thru the examples
in AskTom and documentation found that the follwing syntax works.
(Also realized this is the wrong forum);
SELECT * FROM TABLE (cast(multiset
(SELECT stn_ncdcid,stn_name FROM station_tab WHERE stn_name LIKE '%WSFO%')
AS castTab));
select * FROM TABLE (CAST(MULTISET (SELECT * FROM
THE (SELECT tmn_history FROM tmin WHERE tmn_stn_ncdcid = 01063456) NT
WHERE (EXTRACT(YEAR FROM NT.dta_date) = 1915)
ORDER BY NT.dta_date) as data_tab)) ;