ACM SIGMOD Record
Emancipating instances from the tyranny of classes in information modeling
ACM Transactions on Database Systems (TODS)
Storing and querying ordered XML using a relational database system
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Exploiting statistics on query expressions for optimization
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Partial Indexing for Nonuniform Data Distributions in Relational DBMS's
IEEE Transactions on Knowledge and Data Engineering
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
VLDB '88 Proceedings of the 14th International Conference on Very Large Data Bases
Storage and Querying of E-Commerce Data
Proceedings of the 27th International Conference on Very Large Data Bases
Conditional selectivity for statistics on query expressions
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Query processing for SQL updates
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
ORDPATHs: insert-friendly XML node labels
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Extending RDBMSs To Support Sparse Datasets Using An Interpreted Attribute Storage Format
ICDE '06 Proceedings of the 22nd International Conference on Data Engineering
Node labeling schemes for dynamic XML documents reconsidered
Data & Knowledge Engineering
The case for a wide-table approach to manage sparse relational data sets
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
PIVOT and UNPIVOT: optimization and execution strategies in an RDBMS
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
A relational approach to incrementally extracting and querying structure in unstructured data
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
Filtered Indices and Their Use in Flexible Schema Scenarios
ICDE '08 Proceedings of the 2008 IEEE 24th International Conference on Data Engineering
A comparison of flexible schemas for software as a service
Proceedings of the 2009 ACM SIGMOD International Conference on Management of data
Proceedings of the 2009 ACM SIGMOD International Conference on Management of data
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Efficient support for applications that deal with data heterogeneity, hierarchies and schema evolution is an important challenge for relational engines. In this paper we show how this flexibility can be handled in Microsoft SQL Server. For this purpose, the engine has been equipped in an integrated package of relational extensions. The package includes sparse storage, column set operations, filtered indices, filtered statistics and hierarchy querying with OrdPath labeling. In addition, economical loading of metadata allow us to answer queries independently of the number of columns in a table and drastically improve scaling capabilities. The design of a prototypical content and collaboration application based on a wide table is described, along with experiments validating its performance.