All possible combinations of the strings in the array in PL/SQL

Hello

I'm trying to figure out how to build a list of all possible combinations of string values that are stored in a single table.

There are several 'levels' (a level being of the order in which the value appears in the output string) and multiple values per level...

I am using Oracle 10 g R2, and my table structure is as follows:
--not the best naming conventions, but it works for discussion...
CREATE TABLE FamilyValues
(
  myID      INTEGER                             NOT NULL,
  FamilyID  INTEGER                             NOT NULL,
  myLevel     INTEGER                             NOT NULL,
  myValue     VARCHAR2(10)
)

insert into familyvalues values(1,1,1,'I',);
insert into familyvalues values(2,1,1,'E',);
insert into familyvalues values(3,1,2,'2',);
insert into familyvalues values(4,1,2,'J',);
insert into familyvalues values(5,1,2,'B',);
insert into familyvalues values(6,1,3,'0',);
insert into familyvalues values(7,1,3,'1',);
insert into familyvalues values(8,1,3,'2',);
insert into familyvalues values(9,1,3,'3',);
insert into familyvalues values(10,1,3,'4',);
insert into familyvalues values(11,1,3,'5',);
insert into familyvalues values(12,1,3,'6',);
insert into familyvalues values(13,1,3,'7',);
insert into familyvalues values(14,1,3,'N',);
insert into familyvalues values(15,1,3,'T',);
insert into familyvalues values(16,1,3,'V',);
insert into familyvalues values(17,1,3,'W',);
insert into familyvalues values(18,1,4,'0',);
insert into familyvalues values(19,1,4,'1',);
insert into familyvalues values(20,1,4,'2',);
insert into familyvalues values(21,1,4,'3',);
insert into familyvalues values(22,1,4,'4',);
insert into familyvalues values(23,1,4,'B',);
insert into familyvalues values(24,1,4,'D',);
insert into familyvalues values(25,1,4,'F',);
insert into familyvalues values(26,1,4,'H',);
insert into familyvalues values(27,1,4,'J',);
insert into familyvalues values(28,1,4,'K',);
insert into familyvalues values(29,1,4,'L',);
insert into familyvalues values(30,1,4,'M',);
insert into familyvalues values(31,1,4,'N',);
insert into familyvalues values(32,1,4,'P',);
insert into familyvalues values(33,1,4,'R',);
insert into familyvalues values(34,1,4,'T',);
insert into familyvalues values(35,1,4,'V',);
insert into familyvalues values(36,1,4,'W',);
insert into familyvalues values(37,1,4,'X',);
insert into familyvalues values(38,1,4,'Y',);
insert into familyvalues values(39,1,4,'Z',);
I want to get results, for the sample data above (using only 3 levels for a reasonable amount of data):
I     2     0
I     2     1
I     2     2
I     2     3
I     2     4
I     2     5
I     2     6
I     2     7
I     2     N
I     2     T
I     2     V
I     2     W
E     J     0
E     J     1
E     J     2
E     J     3
E     J     4
E     J     5
E     J     6
E     J     7
E     J     N
E     J     T
E     J     V
E     J     W
so far my best attempt is:
select
    A.myValue || '-' || B.myValue || C.myValue || D.myValue
from
    FamilyValues A
    FULL JOIN FamilyValues B ON (B.myLevel -1) = A.myLevel
    FULL JOIN FamilyValues C ON (C.myLevel -1) = B.myLevel
    FULL JOIN FamilyValues D ON (D.myLevel -1) = C.myLevel
WHERE
    A.myValue IS NOT NULL
    AND B.myValue IS NOT NULL
    AND C.myValue IS NOT NULL
    AND D.myValue IS NOT NULL
I read on the post to (Re: all possible combinations of string in PL/SQL but think it is a slightly different implementation...)

I wish I could recusively pass by the table and make all possible combinations with each of the values in the table in the positions provided by the level... 
select ltrim(sys_connect_by_path(myValue,' ')) combination
  from  familyvalues
  where connect_by_isleaf = 1
  start with myLevel = 1
  connect by FamilyID = prior FamilyID
         and myLevel = prior myLevel + 1
/
COMBINATION
--------------------------------
I 2 0 0
I 2 0 1
I 2 0 2
I 2 0 3
I 2 0 4
I 2 0 B
I 2 0 D
I 2 0 F
I 2 0 H
I 2 0 J
I 2 0 K
I 2 0 L
I 2 0 M
I 2 0 N
I 2 0 P
I 2 0 R
I 2 0 T
I 2 0 V
I 2 0 W
I 2 0 X
I 2 0 Y
I 2 0 Z
I 2 1 0
I 2 1 1
I 2 1 2
I 2 1 3
I 2 1 4
.
.
.

SY.

Tags: Database

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    Sample data model
    ------------------------------












    --
    --
    --
    --

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