ORA-00932: inconsistent datatypes: expected UDT got NUMBER

Question

Hello Friends...
i got this error while inserting record ..
ORA-00932: inconsistent datatypes: expected UDT got NUMBER
wht is that UDT ??
Thanks..

Answer 1

You cannot insert into your table STUDENT using the COURSE_TAB collection, since the column SUB is defined as a single object type.
So either you have to modify your insert into two inserts as follows;
INSERT INTO STUDENT VALUES(1,COURSE('1','ORACLE') )
INSERT INTO STUDENT VALUES(1,COURSE('2','JAVA') )
/or you have to modify your table structure so you can store a nested table, which will allow you to have a single insert
something like this:
drop table s
drop type course_tab
create or replace type course_type as  object (
CNO CHAR(1),
C_CNAME VARCHAR2(10)
CREATE or replace  TYPE course_tab AS TABLE OF course_type;
create table s ( c course_tab )
nested table c store as course_list
-- You can now have a single insert as follows:
  1* insert into s (c) values ( course_tab ( course_type('1','Java'), course_type('2','Oracle'))  )
SQL> /
1 row created.Be careful of using nested tables though. asktom reckons one should not use them.
P;