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Child and parent Relation


Child and parent Relation

Author
Message
ningaraju.n
ningaraju.n
Right there with Babe
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Group: General Forum Members
Points: 758 Visits: 425
I have a table like this
Id ParentId

1 NULL
2 NULL
3 NULL
4 1
5 1
6 2
7 2
8 3
9 3



I need the ordering in result set like this



Id ParentId

1 NULL
4 1
5 1
2 NULL
6 2
7 2
3 NULL
8 3
9 3

Please do the favour
Bhuvnesh
Bhuvnesh
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Sorry difficult play :-P, but desperate to see the reply

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)
Grant Fritchey
Grant Fritchey
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Group: General Forum Members
Points: 146079 Visits: 33199
I think this does what you need.

--test table
CREATE TABLE OrderTest
(id INT,
parentid INT NULL)

--test data
INSERT INTO OrderTest
VALUES
(1, NULL),
(2, NULL),
(3, NULL),
(4, 1),
(5, 1),
(6, 2),
(7, 2),
(8, 3),
(9, 3)

--query
SELECT *
FROM OrderTest
ORDER BY COALESCE(ParentId,Id), Id



----------------------------------------------------
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Product Evangelist for Red Gate Software
Bhuvnesh
Bhuvnesh
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Grant Fritchey (8/10/2010)
I think this does what you need.

--test table
CREATE TABLE OrderTest
(id INT,
parentid INT NULL)

--test data
INSERT INTO OrderTest
VALUES
(1, NULL),
(2, NULL),
(3, NULL),
(4, 1),
(5, 1),
(6, 2),
(7, 2),
(8, 3),
(9, 3)

--query
SELECT *
FROM OrderTest
ORDER BY COALESCE(ParentId,Id), Id



Ahh :-) grant .AWESOME play with COALESCE function.

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)
Grant Fritchey
Grant Fritchey
SSC Guru
SSC Guru (146K reputation)SSC Guru (146K reputation)SSC Guru (146K reputation)SSC Guru (146K reputation)SSC Guru (146K reputation)SSC Guru (146K reputation)SSC Guru (146K reputation)SSC Guru (146K reputation)

Group: General Forum Members
Points: 146079 Visits: 33199
Probably would have worked with ISNULL too, but COALESCE came into my head first.

----------------------------------------------------
The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood...
Theodore Roosevelt

The Scary DBA
Author of: SQL Server Query Performance Tuning and SQL Server Execution Plans
Product Evangelist for Red Gate Software
Bhuvnesh
Bhuvnesh
SSC-Insane
SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)

Group: General Forum Members
Points: 21534 Visits: 4079
Yes its working with ISNULL

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)
ningaraju.n
ningaraju.n
Right there with Babe
Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)

Group: General Forum Members
Points: 758 Visits: 425
Thanks Bhuvanesh... I am glad to you for helping out me
ningaraju.n
ningaraju.n
Right there with Babe
Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)Right there with Babe (758 reputation)

Group: General Forum Members
Points: 758 Visits: 425
Thanks Fritchey... I am glad to you for helping out me
Bhuvnesh
Bhuvnesh
SSC-Insane
SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)SSC-Insane (21K reputation)

Group: General Forum Members
Points: 21534 Visits: 4079
CELKO (8/11/2010)
You might want to look at the Nested Sets model for this. Life will be better.
Any example or link ?

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)
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