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table design

we have a table with many layers of hierarchy information (child-
parent-grandparent-grandgrandparent-grandgrandgrandparent-...).
Relationship built based on two columns (ID, and Parent_ID columns)
While the data model correct and allows us have data like this,
performance of the sql queries is very bad. All the thing that final
users want is faster performance. Can anyone suggest alternate table
design for having hierarchy information?

Thanks!

Nov 2 '07 #1
1 1361
On Nov 2, 5:23 pm, "annecarterfr...@gmail.com"
<annecarterfr...@gmail.comwrote:
we have a table with many layers of hierarchy information (child-
parent-grandparent-grandgrandparent-grandgrandgrandparent-...).
Relationship built based on two columns (ID, and Parent_ID columns)
While the data model correct and allows us have data like this,
performance of the sql queries is very bad. All the thing that final
users want is faster performance. Can anyone suggest alternate table
design for having hierarchy information?

Thanks!
Troels Arvin has a number of links on the subject at:

http://troels.arvin.dk/db/rdbms/links/#hierarchical
HTH
/Lennart

Nov 2 '07 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

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