删除嵌套表类型列的元素值

SQL> create or replace type nt is table of varchar2(20);

  2  /

Type created

SQL> create table tmp(id number,cont nt) nested table cont store as cont_tbl;

Table created

SQL> insert into tmp values(1,nt('a','b','c','d'));

1 row inserted

SQL> select * from table(select cont from tmp where id=1);

COLUMN_VALUE

--------------------

a

b

c

d

SQL> delete from table(select cont from tmp where id=1) where column_value='c';

1 row deleted

SQL> select * from table(select cont from tmp where id=1);

COLUMN_VALUE

--------------------

a

b

d

SQL>