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Aggregate Query Environments :

Aggregate-Query Processing in Data Warehousing

2006-7-29  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-eliminating pro-

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Aggregate-Query Processing in Data Warehousing

Aggregate-Query Processing in Data Warehousing Environments. www-db.stanford/pub/harinarayan/1995/GP2.ps Google Scholar {LMSS94} Alon Y. Levy, Alberto O. Mendelzon, Yehoshua Sagiv, Divesh Srivastava: Answering Queries Using Views.

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Aggregate-Query Processing in Data Warehousing

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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Automated Assessment of Aggregate Query Imprecision

We introduce a model for aggregate queries that applies an in-network aggrega-tion operator and returns a bounded aggregate value. The bounds convey the degree to which the query result reflects the state of the environment during query execution. The bounded aggregate is the triple [L,A,U]: L is a lower

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(PDF) Automated Assessment of Aggregate Query

The protocol,provides,a convenient,mechanism,to intuitively interpret the semantics,associated with an aggregate query’s execution,in pervasive,environments. View full-text Article

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Automated Assessment of Aggregate Query Imprecision

2019-5-11  environments more accessibleby maskingcomplexnetwork details.Animpor-tantclass ofqueries are aggregate queries,which are particularly popular in dynamic networks because they enable in-network aggregation [1–3]—the obser-vation that computation issignificantly cheaper tha n communication in terms ofresource consumption.

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Efficient Execution of Range-Aggregate Queries in Data ...

In order to efficiently evaluate range-aggregate queries in data warehouse environments, several works on data cubes (such as the aggregate cubetree) are proposed.

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FastRAQ: A Fast Approach to Range-Aggregate Queries in

2014-7-30  FastRAQ: A Fast Approach to Range-Aggregate Queries in Big Data Environments Abstract: Range-aggregate queries are to apply a certain aggregate function on all tuples within given query ranges. Existing approaches to range-aggregate queries are insufficient to quickly provide accurate results in big data environments.

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Optimizing queries with aggregate views SpringerLink

2005-6-10  U. Dayal. Of nests and trees: A unified approach to processing queries that contain nested subqueries, aggregates, and quantifiers. In Proc. of the 13th VLDB Conference, Brighton, August 1987. Google Scholar. [GHQ95] A. Gupta, V. Harinarayan, and D. Quass. Aggregate-query processing in data warehousing environments.

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Ad-hoc aggregate query processing algorithms based on

[6] Gupta, A., Harinarayan, V. and Quass, D., Aggregate query processing in data warehousing environments. In: Proceedings of VLDB'95, Morgan Kaufmann, Zurich, Switzerland. Google Scholar [7] Afrati, F.N. and Chirkova, R., Selecting and using views to compute aggregate queries (extended abstract). In: Lecture Notes in Computer Science, vol. 3363.

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Aggregate-Query Processing in Data Warehousing

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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Automated Assessment of Aggregate Query Imprecision in ...

Home Browse by Title Proceedings DAIS '09 Automated Assessment of Aggregate Query Imprecision in Dynamic Environments. Article . Automated Assessment of Aggregate Query Imprecision in Dynamic Environments. Share on. Authors: Vasanth Rajamani.

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(PDF) Aggregate Query Processing using Random walk ...

Aggregate Query Processing using Random walk approach in Dynamic Environment. Download. ... in increasingly sophisticated e- medium for file sharing and distributing data over the business and scientific environments, the vast amount Internet. A peer-to peer (P2P) network consists of of data within P2P databases pose a different numerous peer ...

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Automated assessment of aggregate query imprecision in ...

Automated assessment of aggregate query imprecision in dynamic environments . By Vasanth Rajamani, Christine Julien ... It can thus be difficult to reason about the meaning of a query’s result. ... The protocol enables intuitive interpretations of the semantics associated with an aggregate query’s execution in a dynamic environment. ...

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Automated Assessment of Aggregate Query Imprecision

2017-6-17  intuitively interpret the semantics associated with an aggregate query’s execution in pervasive environments. I. INTRODUCTION The proliferation of laptops, sensors, and other wireless devices has drastically increased the number of data providers embedded in our environment, making pervasive computing a reality.

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Optimizing queries with aggregate views SpringerLink

2005-6-10  Aggregate-query processing in data warehousing environments. In Proc. of the 21th VLDB Conference, Zurich, Sept 1995. Google Scholar [GW87] Richard A. Ganski and Harry K. T. Wong. Optimization of nested SQL queries revisited. In Proc. of the ACM SIGMOD, San Francisco, May 1987.

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Efficient Execution of Range-Aggregate Queries in Data ...

2001-12-18  Range-aggregate queries on the data cube are powerful tools for analysis in data warehouse environments. Cubetree is a technique materializing a data cube through an R-tree. It provides efficient data accessibility, but involves some drawbacks to traverse all the internal and leaf nodes within given query ranges to compute range-aggregate queries.

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Processing Complex Aggregate Queries over Data Streams

2002-4-17  Processing Complex Aggregate Queries over Data Streams Alin Dobra Cornell University [email protected] ... Two key parameters for query processing over continuous data-streams are (1) the amount of memory made available to the on- ... ideal for such “huge database” environments

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A Survey of Top-k Query Processing Techniques in ...

2008-4-23  —Query Model: Top-k processing techniques are classified according to the query model they assume. Some techniques assume a selection query model, where scores are at-tached directly to base tuples. Other techniques assume a join query model, where scores are computed over join results. A third category assumes an aggregate query

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Aggregate functions are not allowed in this query

2017-9-22  It was an easy mistake to make and the exception "Aggregate functions are not allowed in this query" has lots of unrelated Google juice and was not

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Automated Assessment of Aggregate Query Imprecision

2017-6-17  intuitively interpret the semantics associated with an aggregate query’s execution in pervasive environments. I. INTRODUCTION The proliferation of laptops, sensors, and other wireless devices has drastically increased the number of data providers embedded in our environment, making pervasive computing a reality.

Read More
Automated Assessment of Aggregate Query Imprecision in ...

Home Browse by Title Proceedings DAIS '09 Automated Assessment of Aggregate Query Imprecision in Dynamic Environments. Article . Automated Assessment of Aggregate Query Imprecision in Dynamic Environments. Share on. Authors: Vasanth Rajamani.

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Aggregate Query Processing

aggregate query processing in data warehousing. Aggregate-Query Processing in Data Warehousing Environments ... Gupta, A. and Harinarayan, V. and Quass, D. (1995) Aggregate-Query Processing in Data Warehousing ...

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Processing Complex Aggregate Queries over Data Streams

2002-4-17  Processing Complex Aggregate Queries over Data Streams Alin Dobra Cornell University [email protected] ... Two key parameters for query processing over continuous data-streams are (1) the amount of memory made available to the on- ... ideal for such “huge database” environments

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Aggregate query does not support queryMore(), use LIMIT

2017-12-29  Keith Stephens 18 Aggregate query does not support queryMore(), use LIMIT to restrict the results to a single batch

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A Survey of Top-k Query Processing Techniques in ...

2008-4-23  —Query Model: Top-k processing techniques are classified according to the query model they assume. Some techniques assume a selection query model, where scores are at-tached directly to base tuples. Other techniques assume a join query model, where scores are computed over join results. A third category assumes an aggregate query

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Aggregate functions are not allowed in this query

2017-9-22  It was an easy mistake to make and the exception "Aggregate functions are not allowed in this query" has lots of unrelated Google juice and was not

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Monitoring Cloud Environments at Scale with Prometheus

2021-5-25  Thanos Query: Thanos query uses registered store APIs to query for metrics using PromQL. It gives the ability to aggregate and deduplicate multiple metric backends under a single Thanos query endpoint. Thanos Gateway: Thanos gateway implements a store API on top of historical data sitting in object storage. It acts as an API gateway between the ...

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HQL中 "* only allowed inside aggregate function in SELECT ...

2012-2-27  在用NHibernate用CreateQuery类执行select * from tableName 时出现错误 "* only allowed inside aggregate function in SELECT" 解决办法:select u from tableName u

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SQL 求助 报错 not contained in either an aggregate

2018-3-4  SQL 求助 报错 not contained in either an aggregate function or the GROUP BY clause. 我来答 首页 在问 全部问题 娱乐休闲 游戏 旅游 教育培训 金融财经 医疗健康 科技 家电数码 政策法规 文化历史 时尚美容 情感心理 汽车 生活 职业 母婴 ...

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