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  • aggregate query processing meaning

    definition of aggregate query processing. Aggregate-Query Processing in Data Warehousing Environments view definition. Figure 3 is obtained. Using our algorithm for an- swering aggregate queries using ... Read More...

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  • Aggregate-Query Processing in Data Warehousing Environments ...

    Jan 14, 2009 ... Aggregate-Query Processing in Data Warehousing Environments. Gupta, A. and Harinarayan, V. and Quass, D. (1995) Aggregate-Query Processing in Data Warehousing Environments. In: 21th International Conference on Very Large Data Bases (VLDB 1995), September 11-15, 1995, Zurich, Switzerland.

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  • Aggregate-Query Processing in Data Warehousing Environments

    Aggregate-Query. Processing in Data Warehousing. Environments*. Ashish Gupta. Venky Harinarayan. Dallan Quass. IBM Almaden Research Center. Abstract. In this paper we introduce generalized pro- jections (GPs), an extension of duplicate- eliminating projections, that capture aggre- gations, groupbys, duplicate-...

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  • SQL for Aggregation in Data Warehouses - Oracle Help Center

    In fact, any computer process that aggregates data from details to higher levels will benefit from optimized aggregation performance. Oracle9i extensions provide aggregation features and bring many benefits, including: Simplified programming requiring less SQL code for many tasks; Quicker and more efficient query...

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  • Oracle Database 12c - Built for Data Warehousing

    Advanced Data aggregation with Oracle Database 12c Release 2. 3. Rollups and Cubes. 3. Grouping Sets. 5. Grouping Sets. 6. Composite columns. 6. Understanding Levels Within Hierarchical Totals. 6. Approximate Query Processing. 8. Approximate Queries for Data Discovery. 8. Aggregating Approximate Results For...

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  • Optimizing Aggregate Query Processing in Cloud Data Warehouses ...

    Abstract. In this paper, we study and optimize the aggregate query processing in a highly distributed Cloud Data Warehouse, where each database stores a subset of relational data in a star-schema. Existing aggregate query processing algorithms focus on optimizing various query operations but give less importance to...

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  • Aggregate-Query Processing in Data Warehousing ... - Brown CS

    Aggregate-Query Processing in Data Warehousing. Environments*. Ashish Gupta. Venky Harinarayan. Dallan Quass. IBM Almaden Research Center. Stanford University. Abstract. In this paper we introduce generalized pro- jections (GPs), an extension of duplicate- eliminating projections, that capture aggre- gations...

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  • Aggregate-based query processing in a parallel data warehouse ...

    Abstract: In the last years data warehousing has emerged as a fundamental database technology providing the basis for online analytical processing (OLAP). In general, analytical queries involve aggregations of large data sets. This results in serious performance problems if ad-hoc queries are to be answered online.

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  • SQL for Aggregation in Data Warehouses - Oracle Help Center

    To improve aggregation performance in your warehouse, Oracle Database provides the following extensions to the GROUP BY clause: CUBE and ROLLUP ... Computing a CUBE creates a heavy processing load, so replacing cubes with grouping sets can significantly increase performance. To enhance performance...

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  • Optimizing Aggregate Query Processing in Cloud Data Warehouses

    Abstract. In this paper, we study and optimize the aggregate query processing in a highly distributed Cloud Data Warehouse, where each database stores a subset of relational data in a star-schema. Existing aggregate query processing algorithms focus on optimizing various query operations but give less importance to...

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