Identify the IDS that relate to each other?

Hi all

I would appreciate some advice with a special query that is run please. I use Oracle 10 g.

I'm looking to identify children who relate to each other using their extended family relationships where they do not share a direct relationship.

I have two tables:

1 - my_children. This table has a view of the children interested.

2 - all_relations. It has 3 main passes that identifies the relatives of people in my_children and other relatives (see code below). Rel_ID2 is the ID of who have somehow relate to rel_ID1 (child_id). Rel_type explains how they relate (e.g. mother/father/sister/many others).
select * from
my_children mc,
all_relations ar
where mc.child_id = ar.rel_id1(+)
order by child_id
My_children children can share a relationship between them directly (i.e. sibling) or indirectly i.e. child1 concerns child2 (cousin) mother's brother (or any number of steps) but! cannot be entered directly as cousin/cousin (Data Quality). What is important is that there should be a relative ID string to each other through rel_ID1 and rel_ID2.

Using the table of all_relations, I need to identify what children in my_children relate to each other and assign them a value that identifies that they relate each other. This can be done by using a common rel_id or a general value, depending on what is more simple.

I think that this could be done with something like
Starts With Child_ID is not null CONNECT BY PRIOR rel_ID1 = rel_ID2
but I don't understand queries line enough to make it work in this context. I can't use the PL/SQL I need to deploy in another application.

Create tables below. desired1 is the endpoint that interests me. For example, ID A2000 connects indirectly to ID A5592 A4481 and A6000 but A2000 is not A5592 immediately.

So thanks a lot if someone can recommend an approach to this.

Create the table my_children
(child_id varchar (5),)
child_name varchar (20));

insert into my_children (child_id, child_name) values ('A1000', "John Benson");
insert into my_children (child_id, child_name) values ('à1453', "Alice Ronson");
insert into my_children (child_id, child_name) values ('A1822', 'Sarah Jones');
insert into my_children (child_id, child_name) values ('A2000","Mary Watson");
insert into my_children (child_id, child_name) values ('A5592', 'Harry Smythe');


create the table all_relations
(rel_pk varchar (5),)
rel_id1 varchar (5),
rel_id2 varchar (5),
rel_type varchar (20));

insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1349', 'A1000', 'A1459', 'Mother');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1546', 'A1000', 'À1453', 'Sister');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1941', 'À1453', '1973', 'Nièce');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1969', '1973', 'A3489', 'Sister');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R2954', 'A1822', 'A1000', "Half-sister");
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1301', 'A2000', 'A1359', 'Sister');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1366', 'A2000', 'A1359","Cousin");
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R1998', 'A1359', 'A2000', 'Sister');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R3491', 'A2000', 'A4481', 'Brother');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R3450', 'A4481","A6000","Half-brother");
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R7542', "A6000", "A5592', 'Half-twin');
insert into all_relations (rel_id1, rel_id2, rel_pk, rel_type) values ('R3889', 'A4498', 'A2213","Other");


create the table desired1
(child_id varchar (5),)
child_name varchar (20),
famgrpflag varchar (5));

insert into desired1 (child_id, child_name, famgrpflag) values ('A1000', 'John Benson","ZZZZ1");
insert into desired1 (child_id, child_name, famgrpflag) values ('à1453', 'Alice Ronson', 'ZZZZ1');
insert into desired1 (child_id, child_name, famgrpflag) values ('A1822","Sarah Jones","ZZZZ1");
insert into desired1 (child_id, child_name, famgrpflag) values ('A2000","Mary Watson","ZZZZ2");
insert into desired1 (child_id, child_name, famgrpflag) values ('A5592', 'Harry Smythe', 'ZZZZ2');

Hello

Here's a way to do what you asked:

WITH     connect_by_results     AS
(
     SELECT     rel_id1                    AS rel_id
     ,     CONNECT_BY_ROOT     rel_id2          AS root_rel_id
      FROM     all_relations
     CONNECT BY NOCYCLE     rel_id1     = PRIOR rel_id2
          OR           rel_id2     = PRIOR rel_id1
    UNION ALL
     SELECT     rel_id2                    AS rel_id
     ,     CONNECT_BY_ROOT     rel_id1          AS root_rel_id
      FROM     all_relations
     CONNECT BY NOCYCLE     rel_id1     = PRIOR rel_id2
          OR           rel_id2     = PRIOR rel_id1
)
,     got_grp_id     AS
(
     SELECT       rel_id
     ,       MIN (root_rel_id)     AS grp_id
     FROM       connect_by_results
     GROUP BY  rel_id
)
SELECT       c.*
,       g.grp_id
FROM       got_grp_id     g
JOIN       my_children     c  ON     c.child_id     = g.rel_id
ORDER BY  g.grp_id
,            c.child_id
;

Output:

CHILD CHILD_NAME           GRP_I
----- -------------------- -----
A1000 John Benson          A1000
A1453 Alice Ronson         A1000
A1822 Sarah Jones          A1000

A2000 Mary Watson          A1359
A5592 Harry Smythe         A1359

The grp_id is the first child_id (in alphabetical order) that each line is connected, which must not be my_children.
For the abstract grp_ids, use DENSE_RANK to map each grp_id to a single value. In other words, change the main query

SELECT       c.*
,       LPAD ( DENSE_RANK () OVER (ORDER BY  g.grp_id)
            , 5
            , 'Z'
            )          AS famgrpflag
FROM       ...

Everything can stay the same as above. Output:

CHILD CHILD_NAME           FAMGRPFLAG
----- -------------------- ----------
A1000 John Benson          ZZZZ1
A1453 Alice Ronson         ZZZZ1
A1822 Sarah Jones          ZZZZ1

A2000 Mary Watson          ZZZZ2
A5592 Harry Smythe         ZZZZ2

Thanks for posting the CREATE TABLE and INSERT. Instead of posting the results desired in a table, it would be more useful (and less confusing) If you posted at the exit.

Little Penguin says:
... I think that this could be done with something like

Starts With Child_ID is not null CONNECT BY PRIOR rel_ID1 = rel_ID2

Exactly! But don't forget the reflexive nature of your data. It looks like what you call rel_id1 and rel_id2 are arbitrary, at least sometimes. For example, instead of:

insert into all_relations (rel_pk, rel_id1,rel_id2, rel_type) values ('R1366', 'A2000', 'A1359', 'Cousin');

as well, you could say:

insert into all_relations (rel_pk, rel_id1,rel_id2, rel_type) values ('R9999', 'A1359', 'A2000', 'Cousin');

you shouldn't do both. So whatever you do with rel_id1 and rel_id2, you also have to do with rel_id2 and rel_id1 (that is, with the inverse ID).

Tags: Database

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