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aggregate query olap

Aggregate Queries in Peer-to-Peer OLAP
2005-4-11 · We also introduce the class of P2P-OLAP queries. Infor-mally, a P2P-OLAP query over this data model, is a query involving aggregate functions, deﬁned over generalizations of fact tables and dimensions that are distributed in a P2P network. We characterize P2P OLAP queries as a set of datalog rules with aggregation. Based on this characteriza-103
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What is an Aggregate? OLAP Aggregate Definition
What is an Aggregate? Multidimensional databases generally have hierarchies or formula-based relationships of data within each dimension. Aggregation or consolidation involves computing all of these data relationships for one or more dimensions, for example, adding up all Departments to get Total Department data.. It has been claimed that for complex queries OLAP Cubes can
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OLAP window aggregate functions - ibm
2012-11-7 · These aggregate functions do not require an OLAP window to calculate aggregate values from a query result set. They behave like OLAP window aggregation functions, however, in calling contexts where the OVER clause in the function expression defines one or more window partitions, or includes the window ORDER clause and the window Frame clause.
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Evaluation of Top-k OLAP Queries Using Aggregate
2005-8-3 · An interesting OLAP query generalization is the iceberg query [5]; the user is only interested in cells of the cuboid with aggregate values larger than a threshold t (e.g., “ﬁnd the sum of sales for each combination of product-type and month, only for combi-
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Compressed Data Cubes for OLAP Aggregate Query ...
2016-5-21 · Compressed Cubes for OLAP Query Approximation Shanmugasundaram, Fayyad and Bradley 1 Compressed Data Cubes for OLAP Aggregate Query Approximation on Continuous Dimensions Jayavel Shanmugasundaram Microsoft Research and University of Wisconsin Madison, WI 53706 [email protected] Usama Fayyad
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Evaluation of Top-k OLAP Queries Using Aggregate
2005-8-22 · Abstract. A top-k OLAP query groups measures with respect to some abstraction level of interesting dimensions and selects the k groups with the highest aggregate value.An example of such a query is “find the 10 combinations of product-type and month with the largest sum of sales”. Such queries may also be applied in a spatial database context, where objects
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Privacy Preserving OLAP - i.stanford.edu
2007-4-12 · represent the above aggregate query. We take the randomization approach to preserving privacy. The basic idea is that every client Ci perturbs its row ri before sending it to the server S. The randomness used in perturbing the values ensures information-theoretic row-level privacy. Figure1 gives the ∗Supported in part by NSF Grant ITR-0331640
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OLAP and query language: how to write OLAP queries ...
2018-12-18 · The basic OLAP query language is MDX. Multidimensional Expressions is a query language for getting access to multidimensional data structures. MDX queries work with OLAP members, dimensions and hierarchies. With MDX it is possible to query data from SQL server and get a dataset with axis and cell data.
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十大OLAP产品比较 - bjxdd - 博客园
2020-9-16 · 快速查询：部分数据聚合（Partial Aggregate） + 内存化（In-Memory） + 索引（Index ）水平拓展能力：分布式数据（Distributed data）+并行化查询（Parallelizable Query）实时分析：Immutable Past , Append-Only Future 如果你对Druid不了解，请参考这里 ...
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SAP BW 术语表_四楼斑竹-CSDN博客
2014-6-3 · An aggregate is a subset of an InfoCube. The objective when using aggregates is to reduce I/O volume.The BW OLAP processor selects an appropriate aggregate during a query run or a navigation step. If no appropriate aggregate exists, the BW OLAP processor retrieves data from the original InfoCube instead. For examples, assume you may have 10 ...
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(PDF) Aggregate queries in peer-to-peer OLAP
OLAP query execution costs many minutes by its enormous data and OLAP query properties. On the other hand, MOLAP has fast responses. But it has a
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Aggregate Queries in Peer-to-Peer OLAP
2005-4-11 · We also introduce the class of P2P-OLAP queries. Infor-mally, a P2P-OLAP query over this data model, is a query involving aggregate functions, deﬁned over generalizations of fact tables and dimensions that are distributed in a P2P network. We characterize P2P OLAP queries as a set of datalog rules with aggregation. Based on this characteriza-103
Details
Processing Aggregate Queries on Spatial OLAP Data ...
2008-9-2 · Abstract. Spatial OLAP refers to the confluence of two technologies: spatial data management and OLAP for non-spatial data. An example query on spatial OLAP data is to find the total amount of gas sold within a period of time, of certain type of gas, to a certain type of customers, by gas stations located within a query window on a map.
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OLAP aggregation function expressions
2022-2-2 · OLAP aggregation function expressions can return aggregate information about rows in the partitioned results of a query.
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Evaluation of Top-k OLAP Queries Using Aggregate
2005-8-22 · Abstract. A top-k OLAP query groups measures with respect to some abstraction level of interesting dimensions and selects the k groups with the highest aggregate value.An example of such a query is “find the 10 combinations of product-type and month with the largest sum of sales”. Such queries may also be applied in a spatial database context, where objects
Details
SPATIAL OLAP QUERY ENGINE: PROCESSING
2017-9-25 · OLAP query typically requests aggregate information about the non-spatial aspects of the spatial objects inside the query window the user has drawn. The following subsections are short reviews of related work, and a brief introduction of improved query processing strategies to be presented in this thesis.
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OT-OLAP Exception Aggregation - SAP NetWeaver
2020-4-17 · This additional drilldown may lead to a high data volume transferred from the Datamanager to the OLAP Engine which in turn could have an negative impact on the query performance. If BW is based on HANA, the calculation of the exception aggregation can be 'pushed down' to the HANA database, for details see Exception Aggregation in Hana Database .
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analytics - Difference between sql query aggregation and ...
2015-5-25 · I have a query with respect to the advantages of building a OLAP cube vs aggregating data in database table for querying ,data of say 6 months and then archiving the sql table later for analytics purpose.. Which one is better, table or OLAP cube? and why since I can aggregate and keep data in my tables also and query the aggregated data as and when needed.
Details
Privacy Preserving OLAP - i.stanford.edu
2007-4-12 · represent the above aggregate query. We take the randomization approach to preserving privacy. The basic idea is that every client Ci perturbs its row ri before sending it to the server S. The randomness used in perturbing the values ensures information-theoretic row-level privacy. Figure1 gives the ∗Supported in part by NSF Grant ITR-0331640
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OLAP（在线分析处理）| 应用程序，类型，优缺点 ...
2020-8-3 · OLAP（在线分析处理）这个名词是在1993year由E.F.Codd提出来的，只是，眼下市场上的主流产品差点儿都是在1993year之前就已出来，有的甚至已有三十多year的历史了。OLAP产品不少，本文将主要涉及Cognos（Powerplay）、Hyperion （Essbase）、微软（Analysis Service）以及MicroStrategy几大厂商的产品。
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Aggregate Queries in Peer-to-Peer OLAP
2005-4-11 · We also introduce the class of P2P-OLAP queries. Infor-mally, a P2P-OLAP query over this data model, is a query involving aggregate functions, deﬁned over generalizations of fact tables and dimensions that are distributed in a P2P network. We characterize P2P OLAP queries as a set of datalog rules with aggregation. Based on this characteriza-103
Details
Processing Aggregate Queries on Spatial OLAP Data ...
2008-9-2 · Abstract. Spatial OLAP refers to the confluence of two technologies: spatial data management and OLAP for non-spatial data. An example query on spatial OLAP data is to find the total amount of gas sold within a period of time, of certain type of gas, to a certain type of customers, by gas stations located within a query window on a map.
Details
Privacy Preserving Aggregate Query of OLAP for Accurate ...
In all these application scenarios, the main goal consists in providing big data management and analytics services in a privacy-preserving manner, i.e. preserving the privacy of sensitive ...
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New OLAP Aggregate Functions In DB2 for i, Part 1 - IT
2016-7-12 · The new OLAP aggregate functions differ from normal aggregate functions (such as MIN, MAX, SUM, and AVG) in that they can only be used in conjunction with an OLAP aggregation specification (OAS); whereas the normal aggregates can be used with or without an OAS (e.g., they can be used in a GROUP BY summary query).
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Aggregates -- SAP BW Query Performance - SAP
2009-3-24 · OLAP Processor: Query Splitter. The split of a query is rule-based: Parts of the query on different aggregation level are split. Parts with different selections on characteristic are combined. Parts on different hierarchy levels or parts using different hierarchies are split. After the split, OLAP processor searches for an optimal aggregate ...
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分布式聚集函数支持的内存OLAP并行查询处理技术
2009-12-15 · Distributed Aggregate Functions Enabled Parallel Main-Memory OLAP Query Processing Technique ZHANG Yan-Song 1,2,3+, ZHANG Yu3, HUANG Wei1,2, WANG Shan1,2, CHEN Hong1,2 1(Key Laboratory of Data Engineering and Knowledge Engineering
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OLAP and query language: how to write OLAP queries ...
The basic OLAP query language is MDX. Multidimensional Expressions is a query language for getting access to multidimensional data structures. MDX queries work with OLAP members, dimensions and hierarchies. With MDX it is possible to
Details
analytics - Difference between sql query aggregation and ...
2015-5-25 · I have a query with respect to the advantages of building a OLAP cube vs aggregating data in database table for querying ,data of say 6 months and then archiving the sql table later for analytics purpose.. Which one is better, table or OLAP cube? and why since I can aggregate and keep data in my tables also and query the aggregated data as and when needed.
Details
Demystifying aggregates in SAP BI 7.0 | SAP Blogs
2011-9-21 · If we have more than one aggregate built on top of a cube, after the query split, OLAP Processor searches for an optimal aggregate for each part. This means, a single query using a multiple sub query can access more than one aggregate to get the desired output. Refer to the flow chart shown below.
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PostgreSQL OLAP新高度 - CPU向量计算与瓦片式存储-阿里 ...
2017-2-25 · 要么，你可以在执行QUERY前，先执行一下vops_initialize()函数，人为的载入钩子。 VOPS 使用例子既然VOPS 向量计算是为OLAP而生的，所以自然，我需要测试的是OLAP领域的TPC-H。 tpc-h包含了21个QUERY，接下来的例子测试的是Q1和Q6，没有使用
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aggregate query olap

Aggregate Queries in Peer-to-Peer OLAP

What is an Aggregate? OLAP Aggregate Definition

OLAP window aggregate functions - ibm

Evaluation of Top-k OLAP Queries Using Aggregate

Compressed Data Cubes for OLAP Aggregate Query ...

Evaluation of Top-k OLAP Queries Using Aggregate

Privacy Preserving OLAP - i.stanford.edu

OLAP and query language: how to write OLAP queries ...

十大OLAP产品比较 - bjxdd - 博客园

SAP BW 术语表_四楼斑竹-CSDN博客

(PDF) Aggregate queries in peer-to-peer OLAP

Aggregate Queries in Peer-to-Peer OLAP

Processing Aggregate Queries on Spatial OLAP Data ...

OLAP aggregation function expressions

Evaluation of Top-k OLAP Queries Using Aggregate

SPATIAL OLAP QUERY ENGINE: PROCESSING

OT-OLAP Exception Aggregation - SAP NetWeaver

analytics - Difference between sql query aggregation and ...

Privacy Preserving OLAP - i.stanford.edu

OLAP（在线分析处理）| 应用程序，类型，优缺点 ...

Aggregate Queries in Peer-to-Peer OLAP

Processing Aggregate Queries on Spatial OLAP Data ...

Privacy Preserving Aggregate Query of OLAP for Accurate ...

New OLAP Aggregate Functions In DB2 for i, Part 1 - IT

Aggregates -- SAP BW Query Performance - SAP

分布式聚集函数支持的内存OLAP并行查询处理技术

OLAP and query language: how to write OLAP queries ...

analytics - Difference between sql query aggregation and ...

Demystifying aggregates in SAP BI 7.0 | SAP Blogs

PostgreSQL OLAP新高度 - CPU向量计算与瓦片式存储-阿里 ...

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