Issue of SQL Hieraerchical

Oracle Enterprise Version 11.2.0,.3

I need to write a hierarchical query to give me registration with the version of henriq # if the record is a child of a parent. If the folder has no children so I need the parent to save himself.

{code}

Employee:

ID ParentId Version #
11
21
322
433
544
61
755
81

For example:

so I need to show the sheet 1 1 recordID did no parentid

RecordID 8 has no parentid so I need to see the card 8

RecordID 2 has 4 levels of children, I need to get the record with max version 5 i.e Recordid 7

2            1

3-2-2

4-3-3

5-4-4

7-5-5

Expected result

ID Parentid Version

1            1

7-5-5

8            1

Hello

Maybe you want something like this:

SELECT id

parentid

version #.

The EMPLOYEE

WHERE CONNECT_BY_ISLEAF = 1

START WITH parentid IS NULL

CONNECTION BY parentid = PRIOR id

;

The output I get from your sample data is:

PARENTID EXTRA STRONG VERSION

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

1                    1

1                    1

7          5         5

6                    1

8                    1

Did you mean to have 2 identical rows in the table with id = 1?  If so, but you only you one of them appear in the results, use SELECT DISTINCT.

Why you don't want to ID = 6 in the output?

When you talk about "max version" do you mean the highest value, or the deep hierarchy?  In other words, if you have changed the row with id = 4 to be

INSERT INTO EMPLOYEE (id, parentid, version #)

VALUES (4, 3, 300) - version # was originally 3

/

the version 'max' in the output would still be 5, or would it be 300?

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