Generate parent_id using identity column compare name with parent name: Need to help

  • Actual Table:

    IdName Parent_nameParent_id

    1A.B A

    2A.B(1).C B

    3A.B(2).D B

    4A.B.C.D.E D

    5A.B.C.D(1).E D

    6A.B.C.D(2).F D

    Above table Name column having rows like(A.B,A.B(1).C,A.B.C.D.E,A.B.C.D(1).E,A.B.C.D(2).F)

    Parent_Name column having rows like(A,B,B,D,D,D)

    Requirement: The above table id is identity column based upon identity column compare Name with Parent_name need to generate Parent_id column.

    I have write SP like the below:

    CREATE Procedure [dbo].[SSIS_Parent_attr_list_seq_id]

    as

    begin

    set nocount on;

    WITH Cte_ATTR_LIST_LKP(Attribute_Name, Parent_Attribute_Name, ATTR_LIST_SEQ_ID, PARENT_ATTR_LIST_SEQ_ID)

    AS (SELECT ast.Attribute_Name,

    ast.Parent_Attribute_Name,

    alk.ATTR_LIST_SEQ_ID,

    alk.PARENT_ATTR_LIST_SEQ_ID

    FROM dbo.ATTR_LIST_STG AS ast INNER JOIN

    dbo.ATTR_LIST_LKP AS alk ON

    ast.Attribute_Name = alk.Attribute_Name)

    update ATTR_LIST_LKP set PARENT_ATTR_LIST_SEQ_ID=c_PARENT_ATTR_LIST_SEQ_ID from(

    SELECT a1.ATTR_LIST_SEQ_ID, a1.Attribute_Name, a2.ATTR_LIST_SEQ_ID AS c_PARENT_ATTR_LIST_SEQ_ID

    FROM Cte_ATTR_LIST_LKP AS a1 inner JOIN

    Cte_ATTR_LIST_LKP AS a2 ON a1.Parent_Attribute_Name = a2.Attribute_Name) a3 inner join ATTR_LIST_LKP a4

    on a3.Attribute_Name=a4.Attribute_Name

    end

  • Here are 2 ways:

    DECLARE @t TABLE (IdName INT, Parent_name VARCHAR(30), Parent_id VARCHAR(30))

    INSERT INTO @t

    SELECT 1, 'A.B','A'

    UNION ALL SELECT 2, 'A.B(1).C','B'

    UNION ALL SELECT 3, 'A.B(2).D','B'

    UNION ALL SELECT 4, 'A.B.C.D.E','D'

    UNION ALL SELECT 5, 'A.B.C.D(1).E','D'

    UNION ALL SELECT 6, 'A.B.C.D(2).F','D'

    SELECT IdName, Parent_name, Parent_id, parent2

    FROM @t

    CROSS APPLY (SELECT REVERSE(Parent_name)) a(rname1)

    CROSS APPLY (SELECT SUBSTRING(rname1, 1+CHARINDEX('.', rname1), LEN(rname1))) b(rname2)

    CROSS APPLY (SELECT REVERSE(SUBSTRING(rname2, 1, CHARINDEX('.', rname2 + '.')-1))) c(parent1)

    CROSS APPLY (SELECT SUBSTRING(parent1, 1, CHARINDEX('(', parent1 + '(')-1)) d(parent2)

    SELECT IdName, Parent_name, Parent_id, parent2

    FROM @t

    CROSS APPLY dbo.DelimitedSplit8K(REVERSE(Parent_Name), '.') a

    CROSS APPLY (SELECT SUBSTRING(REVERSE(item), 1, CHARINDEX('(', REVERSE(item) + '(')-1)) d(parent2)

    WHERE itemnumber = 2

    The second uses Jeff Moden's (community) DelimitedSplit8K FUNCTION that can be found here:

    http://www.sqlservercentral.com/articles/Tally+Table/72993/


    My mantra: No loops! No CURSORs! No RBAR! Hoo-uh![/I]

    My thought question: Have you ever been told that your query runs too fast?

    My advice:
    INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
    The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.

    Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
    Since random numbers are too important to be left to chance, let's generate some![/url]
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    [url url=http://www.sqlservercentral.com/articles/St

  • Hi jeff,

    Thanks for your information but hear

    columns: id,name,parent_name, Parent_id

    Hear id is identity column, Name and parent_name having some rows as per showing above post, name column need to compare Parent_name and generate Parent_id using Id (identity ) column.

    Note: It's not static i want apply the the code entire table like 100 row or 200 dynamically it needs to work.

  • mahi123 (9/3/2012)


    Hi jeff,

    Thanks for your information but hear

    columns: id,name,parent_name, Parent_id

    Hear id is identity column, Name and parent_name having some rows as per showing above post, name column need to compare Parent_name and generate Parent_id using Id (identity ) column.

    Note: It's not static i want apply the the code entire table like 100 row or 200 dynamically it needs to work.

    Can you modify the DECLARE TABLE and INSERT/SELECT statements above to show us clearly what is in your table?

    Expected results (explicitly) would help also.

    What I wrote will work for 1,000,000 rows if that's what you have in your table.


    My mantra: No loops! No CURSORs! No RBAR! Hoo-uh![/I]

    My thought question: Have you ever been told that your query runs too fast?

    My advice:
    INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
    The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.

    Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
    Since random numbers are too important to be left to chance, let's generate some![/url]
    Learn to understand recursive CTEs by example.[/url]
    [url url=http://www.sqlservercentral.com/articles/St

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