Doubts with varray operation

Question

Hi all
Please see the following example.
SQL> create type tools_va is varray(5) of varchar2(8);
2 /
Type created.
SQL> create table tool_borrower(ename varchar2(12) primary key,tools tools_va);
Table created.
SQL> desc tool_borrower;
Name Null? Type
ENAME NOT NULL VARCHAR2(12)
TOOLS TOOLS_VA
SQL> insert into tool_borrower values('satya',tools_va('a','b'));
1 row created.
SQL> insert into tool_borrower values('dash',tools_va('a','c'));
1 row created.
SQL> select *from tool_borrower;
ENAME
TOOLS
satya
TOOLS_VA('a', 'b')
dash
TOOLS_VA('a', 'c')
SQL> select ename,n.* from tool_borrower,table(tools) n;
ENAME COLUMN_V
satya a
satya b
dash a
dash c
SQL>
Q1.How can i add one more tool for borrower 'satya'
Q2.How can i retrieve only those person who has borrowed tool 'c'
please can anyone give me some idea on this.i am newly using varray and collection.
Thanks in advance
Rudra

Answer 1

Q1.How can i add one more tool for borrower 'satya'
SQL> update tool_borrower set tools = tools_va('a','c','d') where ename = 'satya';
1 row updated.
SQL> declare
  2   tv tools_va;
  3   pk tool_borrower.ename%type := 'satya';
  4  begin
  5   select tools into tv from tool_borrower where ename = pk;
  6   tv.extend;
  7   tv(tv.count) := 'e';
  8   update tool_borrower set tools = tv where ename = pk;
  9  end;
10  /
PL/SQL procedure successfully completed.
SQL> select ename,n.* from tool_borrower,table(tools) n;
ENAME        COLUMN_V
satya        a
satya        c
satya        d
satya        e
dash         a
dash         c
6 rows selected.Q2.How can i retrieve only those person who has borrowed tool 'c'
SQL> insert into tool_borrower values('someone',tools_va('a','f'));
1 row created.
SQL> select ename,n.* from tool_borrower,table(tools) n;
ENAME        COLUMN_V
satya        a
satya        c
satya        d
satya        e
dash         a
dash         c
someone      a
someone      f
8 rows selected.
SQL> select ename from tool_borrower,table(tools) n where n.column_value = 'c';
ENAME
satya
dashRgds.