SQL Server 2008 消除了每个表只能有1024个列的限制，这是通过一个名叫“稀疏列（sparse columns）”的选项来实现的。

SQL Server 2008 has lifted the limit of 1024 columns per table with a new option called "sparse columns".

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该算法采用人们熟悉的树型数据结构，可以较为合理地表示稀疏校验矩阵中行与列中非零元素的跳转关系。

This algorithm used the data of tree structure, and could more reasonably the skipping relations of the non-zero elements in the rows and lines of the sparse check matrix.

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结合列存储数据库系统与稀疏数据自身的特点，本文提出了一种列存储数据库系统适宜存储稀疏数据的观点，并给出稀疏数据库的设计方式。

Through analyzing the characteristics of sparse data, we conclude that it's suitable for column-oriented database to store sparse data and give the method of how to design sparse database.

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