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  • Tuesday 6th Manchester SQL User Group - Chris Testa-O'Neil (Loading a datawarehouse using SSIS) and

    - by tonyrogerson
    Chris will give a talk on Loading a datawarehouse using SQL Server Integration Services, Tony Rogerson will give a talk on Database Design: Normalisation/Denormalisation and using Surrogate Keys - practicalities/pitfalls and benefits in Microsoft SQL Server. Registration is essential which you can do here: http://sqlserverfaq.com?eid=218 . Come and join us for an evening of SQL Server discussion, as well as the two formal sessions by Chris Testa-O'Neil and Tony Rogerson there will be a chance...(read more)

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  • Problem performance datawarehouse with lots of indexes

    - by Lieven Cardoen
    Our product takes tests of some 350 candidates at the same time. At the end of the test, results for each candidate are moved to a datawarehouse full of indexes on it. For each test there's some 400 records to be entered in datawarehouse. So 400 x 350 is a lot of records. If there are not much records in the datawarehouse, all goes well. But if there are already lots of records in the datawarehouse, then a lot of inserts fail... Is there a way to have indexes that are only rebuild at the end of the day or isn't that the real problem? Or how would you solve this?

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  • SQL 2008 Datawarehouse Collection Agent Fails with Mirrored Databases on instance

    - by Dale Wright
    I have a data collection job that fails when a Database on the instance is in Recovery Mode. The database in recovery is the MIRROR partner in the database mirror. The Job that fails is as follows. collection_set_1_noncached_collect_and_upload The job consists of the following steps dcexec -u -s 1 -i "INSTANCE03" EXEC [dbo].[sp syscollector purge collection logs] dcexec -u -s 1 -i "INSTANCE03" The job fails at Step 1. I have run the steps manually and they all appear to be ok. If I change the mirror database to be the principal the job completes successfully.

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  • Handling nulls in Datawarehouse

    - by rrydman
    I'd like to ask your input on what the best practice is for handling null or empty data values when it pertains to data warehousing and SSIS/SSAS. I have several fact and dimension tables that contain null values in different rows. Specifics: 1) What is the best way to handle null date/times values? Should I make a 'default' row in my time or date dimensions and point SSIS to the default row when there is a null found? 2) What is the best way to handle nulls/empty values inside of dimension data. Ex: I have some rows in an 'Accounts' dimensions that have empty (not NULL) values in the Account Name column. Should I convert these empty or null values inside the column to a specific default value? 3) Similar to point 1 above - What should I do if I end up with a Facttable row that has no record in one of the dimension columns? Do I need default dimension records for each dimension in case this happens? 4) Any suggestion or tips in regards to how to handle these operation in Sql server integration services (SSIS)? Best data flow configurations or best transformation objects to use would be helpful. Thanks :-)

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  • Optimierter Workflow durch neues Geo-Datawarehouse: Ein Erfolgsprojekt für die LINZ AG – von CISS TDI und Primebird

    - by A&C Redaktion
    Zufriedene Kunden sind die beste Marketingstrategie. Deshalb bieten wir spezialisierten Partnern die Möglichkeit, professionelle Anwenderberichte über eigene erfolgreiche Oracle Projekte erstellen zu lassen. Hier im Blog präsentieren wir Ihnen in loser Folge Referenzberichte, mit denen Partner bereits erfolgreich werben. Heute: Die Oracle Partner CISS TDI, PRIMEBIRD und deren gemeinsames Großprojekt für die LINZ AGDie österreichische LINZ AG ist als Energieversorgungsunternehmen unter anderem für Strom, Gas und Fernwärme, das Wasser- und Kanalsystem sowie den öffentlichen Personennahverkehr zuständig. Seit Jahren schon nutzt sie zur Verwaltung ihrer stetig wachsenden Geodaten-Bestände Oracle Lösungen. 2012 nun haben die Oracle Partner CISS TDI und PRIMEBIRD die bisherige Oracle Lösung zu einem “Geo-Datawarehouse” ausgebaut und das Datenmodell für die Internet-Planauskunft optimiert. Das neue Datawarehouse stellt die geografischen Datenbestände der LINZ AG in einheitlicher Struktur dar und ermöglicht so eine deutliche Workflow-Optimierung. Die Voreile: der administrative Aufwand wurde reduziert, der Prozess der Datensammlung vereinheitlicht und der notwendige Datenexport, etwa an Bauträger oder die Kommune, läuft mit der neuen Web-Anwendung reibungslos. Details zum genauen Projektverlauf, den spezifischen Anforderungen bei Geodaten und zur Zusammenarbeit zwischen der Linz AG, CISS TDI und PRIMEBIRD finden Sie hier im Anwenderbericht Linz AG.Die Möglichkeit, sich und ihre Arbeit gewinnbringend zu präsentieren, können alle spezialisierten Partner nutzen, die ein repräsentatives Oracle Projekt abgeschlossen haben. Erfahrene Fachjournalisten interviewen dann sowohl Partner als auch Endkunde und erstellen einen ausführlichen, ansprechend aufbereiteten Bericht. Die Veröffentlichung erfolgt über verschiedene Marketing-Kanäle. Natürlich können die Partner die Anwenderberichte auch für eigene Marketingzwecke nutzen, z. B. für Veranstaltungen.Haben Sie Interesse? Dann wenden Sie sich an Frau Marion Aschenbrenner. Wir benötigen von Ihnen einige Eckdaten wie Kundenname, Ansprechpartner und eingesetzte Oracle Produkte, eine Beschreibung des Projektes in 3-4 Sätzen und Ihren Ansprechpartner im Haus. Und dann: Lassen Sie Ihre gute Arbeit für sich sprechen!

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  • Optimierter Workflow durch neues Geo-Datawarehouse: Ein Erfolgsprojekt für die LINZ AG – von CISS TDI und Primebird

    - by A&C Redaktion
    Zufriedene Kunden sind die beste Marketingstrategie. Deshalb bieten wir spezialisierten Partnern die Möglichkeit, professionelle Anwenderberichte über eigene erfolgreiche Oracle Projekte erstellen zu lassen. Hier im Blog präsentieren wir Ihnen in loser Folge Referenzberichte, mit denen Partner bereits erfolgreich werben. Heute: Die Oracle Partner CISS TDI, PRIMEBIRD und deren gemeinsames Großprojekt für die LINZ AGDie österreichische LINZ AG ist als Energieversorgungsunternehmen unter anderem für Strom, Gas und Fernwärme, das Wasser- und Kanalsystem sowie den öffentlichen Personennahverkehr zuständig. Seit Jahren schon nutzt sie zur Verwaltung ihrer stetig wachsenden Geodaten-Bestände Oracle Lösungen. 2012 nun haben die Oracle Partner CISS TDI und PRIMEBIRD die bisherige Oracle Lösung zu einem “Geo-Datawarehouse” ausgebaut und das Datenmodell für die Internet-Planauskunft optimiert. Das neue Datawarehouse stellt die geografischen Datenbestände der LINZ AG in einheitlicher Struktur dar und ermöglicht so eine deutliche Workflow-Optimierung. Die Voreile: der administrative Aufwand wurde reduziert, der Prozess der Datensammlung vereinheitlicht und der notwendige Datenexport, etwa an Bauträger oder die Kommune, läuft mit der neuen Web-Anwendung reibungslos. Details zum genauen Projektverlauf, den spezifischen Anforderungen bei Geodaten und zur Zusammenarbeit zwischen der Linz AG, CISS TDI und PRIMEBIRD finden Sie hier im Anwenderbericht Linz AG.Die Möglichkeit, sich und ihre Arbeit gewinnbringend zu präsentieren, können alle spezialisierten Partner nutzen, die ein repräsentatives Oracle Projekt abgeschlossen haben. Erfahrene Fachjournalisten interviewen dann sowohl Partner als auch Endkunde und erstellen einen ausführlichen, ansprechend aufbereiteten Bericht. Die Veröffentlichung erfolgt über verschiedene Marketing-Kanäle. Natürlich können die Partner die Anwenderberichte auch für eigene Marketingzwecke nutzen, z. B. für Veranstaltungen.Haben Sie Interesse? Dann wenden Sie sich an Frau Marion Aschenbrenner. Wir benötigen von Ihnen einige Eckdaten wie Kundenname, Ansprechpartner und eingesetzte Oracle Produkte, eine Beschreibung des Projektes in 3-4 Sätzen und Ihren Ansprechpartner im Haus. Und dann: Lassen Sie Ihre gute Arbeit für sich sprechen!

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  • Star schema [fact 1:n dimension]...how?

    - by Mike Gates
    I am a newcomer to data warehouses and have what I hope is an easy question about building a star schema: If I have a fact table where a fact record naturally has a one-to-many relationship with a single dimension, how can a star schema be modeled to support this? For example: Fact Table: Point of Sale entry (the measurement is DollarAmount) Dimension Table: Promotions (these are sales promotions in effect when a sale was made) The situation is that I want a single Point Of Sale entry to be associated with multiple different Promotions. These Promotions cannot be their own dimensions as there are many many many promotions. How do I do this?

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  • Building a Data Warehouse

    - by Paul
    I've seen tutorials articles and posts on how to build datawarehouses with star and snowflakes schemas, denormalization of OLTP databases fact and dimension tables and so on. Also seen comments like: Star schemas are for datamarts, at best. There is absolutely no way a true enterprise data warehouse could be represented in a star schema, or snowflake either. I want to create a database that will server for reporting services and maybe (if that isn't enough) install analisys services and extract reports and data from cubes. My question was : Is it really necesarry to redesign my current database and follow the star/snowflake schemas with fact and dimension tables ? Thank you

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  • Star schema [fact 1:n dimension]...how?

    - by Mike Gates
    I am a newcomer to data warehouses and have what I hope is an easy question about building a star schema: If I have a fact table where a fact record naturally has a one-to-many relationship with a single dimension, how can a star schema be modeled to support this? For example: Fact Table: Point of Sale entry (the measurement is DollarAmount) Dimension Table: Promotions (these are sales promotions in effect when a sale was made) The situation is that I want a single Point Of Sale entry to be associated with multiple different Promotions. These Promotions cannot be their own dimensions as there are many many many promotions. How do I do this?

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  • Parsing GeoRSS Feed with jQuery

    - by senfo
    I'm attempting to use the jQuery jFeed plugin for parsing an Atom, GeoRSS feed and I'm running into issues extracting the information I need. For example, I need to extract the summary element and I would like to render the contents in a div on my HTML page. Additionally, I'd like to extract the contents from the georss:point elements and pass them into Google Maps to render them as points on a map. The problem is that it seems jFeed is stripping out the GeoRSS-related information. For example, I can extract the title element without issues, but it seems it doesn't extract the summary or georss:point elements, at all. Following is a snippet of the XML I'm working with: <feed xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss"> <title>Search Results from DataWarehouse.HRSA.gov</title> <link rel="self" href="http://datawarehouse.hrsa.gov/HGDWDataWebService/HGDWDataService.aspx?service=HC&zip=20002&radius=10"/> <link rel="alternate" href="http://datawarehouse.hrsa.gov/"/> <author> <name>HRSA Geospatial Data Warehouse</name> </author> <id>tag:datawarehouse.hrsa.gov,2010-04-05:/</id> <updated>2010-04-05T19:25:28-05:00</updated> <entry> <title>Christ House</title> <link href="http://www.christhouse.org" /> <id>tag:datawarehouse.hrsa.gov,2010-04-05:/D388C4C6-FFA4-4091-819B-64D67DC64931</id> <summary type="xhtml"> <div xmlns="http://www.w3.org/1999/xhtml"> <div class="vcard"> <div class="fn org">Christ House</div> <div class="adr"> <div class="street-address">1717 Columbia Rd. N.W.</div> <span class="locality">Washington</span>, <span class="region">District of Columbia</span>, <span class="postal-code">20009-2803</span> </div> <div class="tel">202-328-1100</div> </div> <div> Categories: <span class="category">Service Delivery Site</span> </div> </div> </summary> <georss:point>38.9243636363636 -77.0395636363637</georss:point> <updated>2010-04-04T00:00:00-05:00</updated> </entry> </feed> Following is the jQuery code that I'm using: $(document).ready(function() { $.getFeed({ //url: 'http://datawarehouse.hrsa.gov/HGDWDataWebService/HGDWDataService.aspx?service=HC&zip=20002&radius=10', url: 'test.xml', success: function(feed) { $.each(feed.items, function(index, value) { $('#rssContent').append(value.title); // Set breakpoint here }); } }); }); I set a breakpoint on the line that appends to the rssContent div and noticed the objects in feed.items don't have the properties I'm after. Am I doing something wrong or was jFeed simply not designed to work the way I want it to?

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  • Populate an SSRS Report parameter(hidden) by a sproc or user defined function

    - by Nauman
    My SSRS report fetches data from my DATAWAREHOUSE. The ASP.NET application I have is connected to an OLTP database. I invoke the SSRS Report from my ASP.NET application and provide a parameter as CustomerID(this is an application key in datawarehouse) to my report. Since my report is connected to my datawarehouse, I do not query my report databased on the OLTP's CustomerID. Instead I use my datawarehouse's surrogate key (CustomerDimKey). Now, in my report, I need to find the correct surrogate key for the CustomerID parameter, which I passed from my ASP.NET application! My report already has a parameter as @CustomerDimKey(this is used across all the report sprocs). We used it for testing, but now we'll hide this as we have integrated it with the ASP.NET application. I have already added a new parameter to the report as @CustomerID(this will have the OLTP's CustomerID), which will now get a value from ASP.NET. I need to know a way to re-use the @CustomerDimKey report parameter, which should now get value from a sql statement or a sproc once the report is requested. Based on the value contained by the @CustomerID parameter.

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  • TimeStamp and mini-ETL (extract, transform, load)

    - by Tomaz.tsql
    Short example how to use Timestamp for a mini ETL process of your data. example below is following: Table_1 is production table on server1 Table_2 is datawarehouse table on server2 where datawarehouse is located Every day data are extracted, transformed and loaded to dataware house for further off-line usage and data analysis and business decision support. 1. Creating the environment if object_id ('table_1') is not null drop table table_1; go if object_id ('table_2') is not null drop...(read more)

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  • many partitions on a single filegroup?¿ does it make sense?

    - by river0
    Hi, I'm designing a datawarehouse solution and I'm a newbie in disk configuration issues, let me explain you. Our storage is spread over 6 storage enlosures having each of them 5 raid-1 disk arrays, and having 2 LUNS defined per each disk array, which makes a total 48 LUNS (this is following Microsoft fast track recommendations for datawarehouse architectures). I would like to partition my data, on other projects I have worked before, we always followed a 1 partition - 1 filegroup rule. On the microsoft fast track recomendations it is advised to create a filegroup and then for that filegroup a data file per each lun... but I pretend to have a week level partitioning... if I apply that rule I think that I'll get too many files and a complex layout. I'm thinking of just creating just one filegroup (with the 48 lun data files), but still create the partitions since I want to keep soem of the benefits of partitions like partition switching... Is this scenario not recommended? What would you suggest?

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  • Re-deploy Reports from SCOM 2007 R2 Management Packs

    - by Gabriel Guimarães
    I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Thanks in advance.

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  • Re-deploy Reports on SCOM Management Packs

    - by Gabriel Guimarães
    I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Thanks in advance.

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  • Re-deploy only the reports on SCOM Management Packs

    - by Gabriel Guimarães
    I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Thanks in advance.

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  • New Exadata public references

    - by Javier Puerta
    The following customers are now public references for Exadata. Show your customers how other companies in their industries are leveraging Exadata to achieve their business objectives. BRITISH TELECOM - Communications - United Kingdom 2x Full Rack + 1x Quarter Rack Exadata Database Machine Oracle University Training Courses Success Story DEUTSCHE BANK - Financial Services - Germany 18x Full Rack Exadata Database Machine Warehouse for Credit Risk Reporting running on Exa Success Story OPENBAAR MINISTERIE - Public Sector - Netherlands 1x Full Rack Exadata Database Machine Datawarehouse usage Success Story ADRIATIC SLOVENICA - Insurance - Slovenia 1x Quarter Rack Exadata Database Machine running on Linux Replacing Oracle DB and Oracle Application Server Success Story More customer success stories at Oracle.com References

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  • OBIA on Teradata - Part 4

    - by Mohan Ramanuja
    Monitoring Tools Name Action Teradata Manager (PMON) Check for down resources UNIX Check the /var/adm/streams log DBC.Software_Event_Log Check for hardware errors. Tunable ParametersFollowing parameters could be tuned for better performance Maximum Response Buffer Size (MAXRESPSIZE) Session Data Unit (SDU) Transport Date Unit (TDU) Related Links http://forums.teradata.com/forum http://www.info.teradata.com/Datawarehouse/eBrowseBy.cfm?page=TeradataDatabase http://www.teradataforum.com/ncr_pdf.htm http://www.teradata.com/blogs/ http://www.teradatamagazine.com/

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  • Migrated SCOM 2007 R2 Reporting Services but reports are gone

    - by Gabriel Guimarães
    I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Any help is appreciated. Thanks in advance.

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  • SSRS2005 timeout error

    - by jaspernygaard
    Hi I've been running around circles the last 2 days, trying to figure a problem in our customers live environment. I figured I might as well post it here, since google gave me very limited information on the error message (5 results to be exact). The error boils down to a timeout when requesting a certain report in SSRS2005, when a certain parameter is used. The deployment scenario is: Machine #1 Running reporting services (SQL2005, W2K3, IIS6) Machine #2 Running datawarehouse database (SQL2005, W2K3) which is the data source for #1 Both machines are running on the same vm cluster and LAN. The report requests a fairly simple SP - lets called it sp(param $a, param $b). When requested with param $a filled, it executes correctly. When using param $b, it times out after the global timeout periode has passed. If I run the stored procedure with param $b directly from sql management studio on #2, it returns the results perfectly fine (within 3-4s). I've profiled the datawarehouse database on #2 and when param $b is used, the query from the reporting service to the database, never reaches #2. The error message that I get upon timeout, when using param $b, when invoking the report directly from SSRS web interface is: "An error has occurred during report processing. Cannot read the next data row for the data set DataSet. A severe error occurred on the current command. The results, if any, should be discarded. Operation cancelled by user." The ExecutionLog for the SSRS does give me much information besides the error message rsProcessingAborted I'm running out of ideas of how to nail this problem. So I would greatly appreciate any comments, suggestions or ideas. Thanks in advance!

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  • Oracle@Work: IDS bringt mit Exadata Licht ins Investmentcontrolling

    - by A&C Redaktion
    Die Datenmengen, die die IDS GmbH (Analysis and Reporting Services) tagtäglich zu bewältigen hat, sind enorm: Bei der Tochter der Allianz SE sind alle Dienstleistungen rund um das Investmentcontrolling angesiedelt. Das Unternehmen benötigte eine ausbaufähige Datawarehouse-Lösung, in der alle Daten zusammengeführt, harmonisiert und angereichert werden können. Als optimale Lösung fand IDS schließlich zu Exadata, genauer der Oracle Exadata Database Machine. Die Implementierung erfolgte gemeinsam mit dem Oracle Platinum Partner ISE, der den technischen und beratenden Part übernommen hatte und IDS weiterhin bei der Weiterentwicklung unterstützt. Wie Exadata dort zum Einsatz kommt und warum sich diese Investition für IDS gelohnt hat, erfahren Sie im hier im Video:

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  • Why creating a new MDX language instead of extending SQL?

    - by DReispt
    I have a long experience with SQL, but recently began working with datawarehouse and OLAP technologies: building fact and dimension tables, that then are queried using MDX (MultiDimensional eXpressions). The problem is that MDX works with a completely different logic compared to SQL, and it's a whole new learning curve even for someone with a strong SQL background. Yes, MDX allows you to do things that would be hard or almost impossible with plain SQL. But sometimes it's frustrating to be hours around an MDX to do something you know you could achieve in minutes using SQL (ok, you can tell me to RTFM ...). But why go on to the trouble of creating a new completely different language when you could build on SQL, extend it to add the features needed by OLAP applications?

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