Get the parent-child hierarchy of column delimited
I've been on this forum once before, and someone helped me, so I hope I can get help again!
4-15-5987');
Thus, the hierarchy is divided on the hyphen. first parent being 4245, then the next value is-4 (including the hyphen) and what follows is - 1, for example
CREATE TABLE REGEXTEST ( ITEM VARCHAR(20)); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-1'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-10'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-11'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-12'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-13'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-14'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-15'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-15-59A7'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-15-59D7'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-4-15-59F7'); INSERT INTO REGEXTEST (ITEM) VALUES ('4245-
I have to be able to bind-1, -4, 4245. Perhaps the simplest is to build a new table with a primary key where it is assigned the id of the parent to the child.
I just can't understand how to divide the individual elements and maintain the hierarchy. As previously mentioned, someone helped me with another part of the problem before where I needed to maintain the entire path of each child with the following query:
select nvl(prior item,item) parent, nvl2(prior item,item,null) child from REGEXTEST connect by substr(item,1,instr(item,'-',-1) - 1) = prior item order by child,parent
Now, if I could extrapolate that into a new table:
CREATE TABLE FileHierarchy (ItemID INT NOT NULL PRIMARY KEY, ItemName varchar(50) NOT NULL, ParentID INT NULL);
ItemName is the 4245 or - 4 or - 1 (only) - Yes, including the hyphen.
The ID of the parent-1 would be the ID-4, etc...
Thank you very much in advance!
J.F. Larente
Solution for not having stored the high level:
SQL > select *.
regextest 2
3.
POINT LEV
-------------------- ----------
4245 4
4245 4-1
4245 4-10
4245 4-11
4245 4-12
4245 4-13
4245 4-14
4245 4-15
4245 4-15-59 A 7
4245 4-15-59 D 7
4245-4-15-59F7
11 selected lines.
SQL > with t1 as)
2. Select item
regextest 3
4 Union all the
5 select distinct substr (item, 1, instr(item,'-',1))
6 of regextest
7 ),
8 t2 as)
9. select element,
10 row_number() on id (order by article)
11 from t1
12 )
13. select id,
14 regexp_substr (rtrim (point,'-'), case level when 1 then ' [^-] + $' other '-[^-] + $' end) child.
parentID 15 prior id,
16 regexp_substr (prior rtrim (point,'-'), case level - 1 when 1 then ' [^-] + $' other '-[^-] + $' end) parent
17 of t2
beginning 18 with substr(item,-1) = '-'
19 connect by substr (item, 1, instr(item,'-',-1) - 1) = prior rtrim(item,'-')
20 and article! point prior =
21.
ID PARENTID PARENT CHILD
---------- -------------------- ---------- --------------------
1 4245
2 -4 1 4245
3 -1 2 -4
4 -10 2 -4
5 -11 2 -4
6 -12 2 -4
7 -13 2 -4
8 -14 2 -4
9 -15 2 -4
10-59A 7 9-15
11 59 D 7 9 - 15
ID PARENTID PARENT CHILD
---------- -------------------- ---------- --------------------
12 59F7 9-15
12 selected lines.
SQL >
SY.
Tags: Database
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