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Difference between sql query aggregation and aggegration ...

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.

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How to Group and Aggregate fields in a Pivot Table OLAP ...

Aug 16, 2012 · produced this video. This video shows how to Group and Aggregate fields within a Pivot Table. Email us at [email protected] if you need help, custom reports, or ...

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What is an Aggregate? OLAP Aggregate Definition

What is an Aggregate? dimensional 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 produce an answer .

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Where Clause (MDX) - IcCube

Where Clause (MDX) MDX where clause (aka. slicer). Description. The MDX where clause even though sharing the same name as the SQL statement is fundamentally different. An MDX WHERE clause reduces the scope of the query. The WHERE clause reduces the cube into a new 'sliced' cube, the slice being defined by the WHERE clause.

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SSAS - Understanding Non Aggregate Measures - Blogger

SSAS - Understanding Non Aggregate Measures Recently I have been asked a question, I have defined my measure with aggregate function as "None" and all the values are returned as Blank. What is the reason for this? ... As RegionId has been used in the query, by default ProductId will be at the "All" level. In the below MDX query, the ...

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Aggregates -- SAP BW Query Performance - SCN Wiki

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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Aggregate Query Commands (OLAP) · QSFT/Doradus Wiki · GitHub

Aggregate Query via Entity. Aggregate query parameters can be provided in an input entity instead of URI parameters. The same REST command is used except that no URI parameters are provided. Because some browsers/HTTP frameworks do not support HTTP GET-with-entity, this command also supports the PUT method even though no modifications are made.

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OLAP QUERIES - Academics | WPI

• OLAP queries are complex queries that ... to answer the OLAP query • When answering a query 15 Dicing Time by day 10 47 30 Milk 1%fat 12 ... • Data cubes pre-compute and aggregate the data • Possibly several data cubes with different granularities

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Non-aggregated measure in OLAP cube - Stack Overflow

Generally you'll only have aggregate data in an OLAP cube, since the main purpose of the cube is to pre-aggregate the data. While you could add the datestamp as a Dimension, and have each value in the cube representing a single record in your relational database, you'll lose much of the performance benefit of having the data in an olap structure.

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

Jul 12, 2016 · 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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Answering approximate range aggregate queries on OLAP data ...

Answering Approximate Range Aggregate Queries on OLAP Data Cubes with Probabilistic Guarantees Alfredo Cuzzocrea1, Wei Wang2∗, Ugo Matrangolo3 1 DEIS Dept. – University of Calabria 87036 Rende, Cosenza, Italy [email protected] 2 School of Computer Science and Engineering – University of New South Wales 2052 Sydney, Australia [email protected] 3 ICAR Inst. – CNR 87036 Rende ...

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What is an Aggregate? OLAP Aggregate Definition

What is an Aggregate? dimensional 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 produce an answer .

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Aggregate (MDX) - SQL Server | Microsoft Docs

Aggregate (MDX) 06/04/2018; 2 minutes to read; In this article. Returns a number that is calculated by aggregating over the cells returned by the set expression. If a numeric expression is not provided, this function aggregates each measure within the current query context by using the default aggregation operator that is specified for each ...

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When to use aggregate tables - microstrategy

When to use aggregate tables. MicroStrategy uses optimized SQL to query the relational database directly to answer users' questions. Users can ask any question that is supported by the data in their warehouse and then analyze the results until they find a precise answer.

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OLAP window aggregate functions - IBM

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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Compressed Data Cubes for OLAP Aggregate Query ...

Queries over more than one target measure or using different aggregate functions, along with the aggregation function of interest, is fixed for each cube. Queries over more than one target measure or using different aggregation functions, would require pre-computing larger data cubes.

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Basics of Cube Aggregates and Data Rollup | SAP Blogs

Jul 07, 2013 · Steps before using an Aggregate. To use an aggregate for an Info Cube when executing a query, we must first activate it and then fill it with data. To use an existing aggregate select the aggregate that you want to activate and choose Activate and Fill. The system will create an active version of the aggregate.

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Aggregate (data warehouse) - Wikipedia

Aggregates are used in dimensional models of the data warehouse to produce positive effects on the time it takes to query large sets of data.At the simplest form an aggregate is a simple summary table that can be derived by performing a Group by SQL query. A more common use of aggregates is to take a dimension and change the granularity of this dimension.

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Metric Parameter for Aggregate Queries (OLAP) · QSFT ...

The aggregate query metric parameter has ple formats, as described below. If the metric function parameter is a field path with a reflexive link, the transitive operator can be used. Example: COUNT=(DirectReports^) This function counts all DirectReports link values for each perspective object ...

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OLAP Other Time (3999) and PE: Aggregate (51099) very high ...

OLAP Other Time (3999) - This takes for our planning query normally 500-600 Seconds; PE: Aggregate (51099) - This takes for our planning query normally 350-450 Seconds. I tried to find some explanation for the Both OLAP Processes above, but seems not to be a lot of information around about.

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