Comments on: SQL SERVER – 2008 – Introduction to SPARSE Columns http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/ Notes of a SQL Server MVP and Database Administrator Sat, 21 Nov 2009 05:54:09 +0000 http://wordpress.com/ hourly 1 By: SQL SERVER - 2008 - Interview Questions and Answers - Part 6 Journey to SQL Authority with Pinal Dave http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/#comment-47475 SQL SERVER - 2008 - Interview Questions and Answers - Part 6 Journey to SQL Authority with Pinal Dave Thu, 26 Feb 2009 12:05:13 +0000 http://sqlauthority.wordpress.com/?p=678#comment-47475 [...] A sparse column is another tool used to reduce the amount of physical storage used in a database. They are the ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values. (Read More Here) [...] [...] A sparse column is another tool used to reduce the amount of physical storage used in a database. They are the ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values. (Read More Here) [...]

]]> By: Qingsong http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/#comment-41687 Qingsong Thu, 14 Aug 2008 19:02:01 +0000 http://sqlauthority.wordpress.com/?p=678#comment-41687 The row compression and page compression do compress Null value. The compression ratio of sparse is usually less than the page compression. However, Sparse has less CPU overhead than row compress and page compression because it does not compress the not null value, but only ignore the Null values. I will post an example of comparing the storage size and the performance different for these two techniques. The row compression and page compression do compress Null value. The compression ratio of sparse is usually less than the page compression. However, Sparse has less CPU overhead than row compress and page compression because it does not compress the not null value, but only ignore the Null values. I will post an example of comparing the storage size and the performance different for these two techniques.

]]> By: Dilip http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/#comment-41566 Dilip Mon, 11 Aug 2008 08:39:46 +0000 http://sqlauthority.wordpress.com/?p=678#comment-41566 This is very small introduction, plz give more details This is very small introduction, plz give more details

]]> By: Heiko Hatzfeld http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/#comment-40212 Heiko Hatzfeld Mon, 14 Jul 2008 12:41:47 +0000 http://sqlauthority.wordpress.com/?p=678#comment-40212 Hi... I am not quite sure if sparse columns are that great. I mean SQL2008 does come with an option to compress row data. How would this feature work combined with sparse Cols? And I dont think the cost of diskspace is that high these days. You could save a few bytes here and there, but what would you really gain? You can have more columns per row, but I see 1024 and think do we realy need more in a realtional DB? I can see more in a cube, but then most columns would store redundant data,and row compression should be very efficient. You mention a performance hit? How big is it? That would be much more interesting. Hi…

I am not quite sure if sparse columns are that great. I mean SQL2008 does come with an option to compress row data.

How would this feature work combined with sparse Cols?

And I dont think the cost of diskspace is that high these days. You could save a few bytes here and there, but what would you really gain? You can have more columns per row, but I see 1024 and think do we realy need more in a realtional DB? I can see more in a cube, but then most columns would store redundant data,and row compression should be very efficient.

You mention a performance hit? How big is it? That would be much more interesting.

]]> By: SQL SERVER - 2008 - Introduction to SPARSE Columns - Part 2 Journey to SQL Authority with Pinal Dave http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/#comment-40198 SQL SERVER - 2008 - Introduction to SPARSE Columns - Part 2 Journey to SQL Authority with Pinal Dave Mon, 14 Jul 2008 09:36:12 +0000 http://sqlauthority.wordpress.com/?p=678#comment-40198 [...] 14, 2008 by pinaldave Previously I wrote about SQL SERVER - 2008 - Introduction to SPARSE Columns. Let us understand the concept of SPARSE column in more detail. I suggest you read the first part [...] [...] 14, 2008 by pinaldave Previously I wrote about SQL SERVER – 2008 – Introduction to SPARSE Columns. Let us understand the concept of SPARSE column in more detail. I suggest you read the first part [...]

]]> By: Shital Shah http://blog.sqlauthority.com/2008/07/10/sql-server-2008-introduction-to-sparse-columns/#comment-40187 Shital Shah Mon, 14 Jul 2008 02:20:04 +0000 http://sqlauthority.wordpress.com/?p=678#comment-40187 This is very shallow introduction. So what is the disadvantage? This is very shallow introduction. So what is the disadvantage?

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