How to write a recursive select procedure to read hierarchial data?
Hi!
I have a database where two tables are of interest to me.
TABLE1
ITEM_ID
TABLE2
PARENT_ID
CHILD_ID
There is a constrant between the tables so parent_id and child_id must exist in TABLE1 (they are actually same objects as those defined in TABLE1 using PK ITEM_ID)
This table design is used to create tree structures. But I ahve hit a bump in the road on how to create a procedure that give me the entire structure as a recordset.
Basically I just want to execute the procedure and I should be able to see the hierarchy, pergaps by appending pipe characters... like
|Node1
||Node11
|||Node111
||Node12
|||Node121
|Node2
Later in my web app I will create a word like document using this information. But first I just need to list the structure from a specific parent.
Do you perhaps have an idea how to create such a procedure? It should have at least 1 input parameter and that is the start parent. Then it should perhaps work in a recursive manner.
Im very sure this has been done before, but I have not found a good example using the table design as stated above.
kind regards
Henrik
Please read about [url http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a96540/queries4a.htm#2053937]Hierarchical Queries in the manual.
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How to write the following SELECT
CARDS Commission
0-20 0
21-25 500
26-31 650
32-36 850
37> 1050
If an PERSON sells 28 cards in a month, commission would be computed as below.
25*500 = 12500
3*650 = 1950
Total commission 14450New solution:
SQL > var cards_sold NUMBER;
SQL > exec :cards_sold := 28;
PL/SQL procedure successfully completed.
SQL >
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2 (
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6 SELECT 32 AS MIN_CARD, 36 AS MAX_CARD, 850 AS COMMISSION FROM DUAL UNION ALL
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8 )
9 SELECT LEAD(PART_COMMISSION,1) OVER (ORDER BY MAX_CARD DESC)
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COMMISSION
14450Explanation:
/* According to your requirements commission is calculated in two parts.
* The first part is equal to the COMMISSION value for the RANGE that the :cards_sold exceeds (21-25 in this case)
* multiplied by the MAX_CARDs value in that range. This is indicated by (A) below.
* The second part is the COMMISSION in the range that the :cards_sold is included in multipled by the
* difference of the :cards_sold and the MAX_CARD values for the RANGE that the :cards_sold exceeds (21-25 in this case).
* This is indicated by (B) below.
SELECT LEAD(PART_COMMISSION,1) OVER (ORDER BY MAX_CARD DESC) /* (A) */
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FROM
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Message was edited by:
skp71
Message was edited by:
skp71 -
How to write select query for this
Hi,
I had a html form and in the for i had drop down box and it needs to select multiple values from the drop down box. When i select multiple values then i have to write the SQL select statement query .
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Thanksselect * from Table
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[email protected]
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Iam new to the xml,
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11
12 /
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SQL>
SQL>
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SQL>
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