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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...SQL and Profile PropertiesSQL and Profile Properties
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5/2/2007 5:42 PM
 
Rodney Joyce


www.pokerdiy.com
Joined: 4/28/2004
Posts: 2796

Ah yes, you quite right - I was thinking of the single field XML format, but it is still very hard to query in the name/value format:

1    PropertyValue    nvarchar    3750    1
0    PropertyText    ntext    16    1

 

ie. if you want to get the profile values for a single user it returns n rows, where n is the number of properties, as opposed to a single row, unless there is an easy way to do this (I currently use a view in my ST UserProfile module, but I am worried it will not scale over 50k of users.

 

 

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5/2/2007 5:52 PM
 
Sebastian Leupold


Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

www.dnnwerk.de
Joined: 3/8/2004
Posts: 46212

SQL 2005 comes with a new language option "PIVOT", that allows to return a normalized table - unfortunately you need to set database's compatibility level to 90.

If you don't need to pivot in database layer, you can use DNN built in function "BuildCrossTabDataSet", that loads the serialized data into a proper data set.

Cheers from Germany,
Sebastian Leupold

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5/3/2007 1:57 PM
 
Rodney Joyce


www.pokerdiy.com
Joined: 4/28/2004
Posts: 2796

I am aware of the Pivot option but will need to support SQL 2000 for some time I think in my m commerical modules (unfortunately!)

The problems I have found is that I need to do all the operations in the SQL layer, not the business layer - I do sorting and paging in SQL for scalability and efficiency, so I do not want to bring back all the data back and then convert it - I need to narrow it down and then bring it back, but I am still trying some ideas.

Thanks for the method - I will check it out anyway - I need to make sure it works with a high volume of users (50k+) and 20-30 profile properties per user.

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