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Dylan's BI Notes

Syndicate content Dylan's BI Study Notes
My notes about Business Intelligence, Data Warehousing, OLAP, and Master Data Management
Updated: 26 min 32 sec ago

How to support Team based security

Wed, 2015-12-16 11:44
Team-based security is referring to a specific data security requirement scenario. Team-based security means that the object being secured has a “team” associated with it.  The team members can access the objects. M:M relationship There is a many-to-many relationship.   A person may be added to multiple teams.  A team can be multiple members. In Siebel […]
Categories: BI & Warehousing

Multiple Tenant Support

Mon, 2015-11-30 15:57
The definition of multi-tenancy varies.  Some people think that the tenants are data stripping and adding a tenant ID to every table is to support multiple tenants. One of such example is Oracle BI Applications.  We added the tenant_id everywhere and assume that we can use it later to partition the data. In the cloud […]
Categories: BI & Warehousing

How to implement Union in ODI and OBIEE?

Mon, 2015-11-16 20:54
When do you need to use UNION in BI? You need to use UNION when you would like to combine the data sets as a single data set.  However, when do you exactly need to do this type of thing in BI or in data warehouse ETL?  Here are some real business cases: 1. Multiple Source […]
Categories: BI & Warehousing

Logical and Physical Schema in ODI

Tue, 2015-11-10 23:28
ODI Topology allows you to isolate the physical connection and the logical data source by defining the physical schema and logical schema. This object may be seen as redundant during development.  However, it is a very useful feature for supporting the Test to Production (T2P) process.  The objects in the design tab references only the logical […]
Categories: BI & Warehousing

Generate Date dimension in PL/SQL Table Function

Fri, 2015-10-30 09:50
Almost all data warehouse have a date dimension.  The purpose of the date dimension is to provide some pre-calculated grouping for dates.  It helps rolling up the data that entered against dates to a higher level, such as year, quarter, month, week, etc. In some system, source files are used in generating the date dimension.  […]
Categories: BI & Warehousing

Use initialization block in OBIEE

Wed, 2015-10-21 12:33
I just add a post about using initialization block in OBIEE. It is a feature I felt excited when I first see the tool. See Page: Initialization Block Before I worked on BI, I worked for EBS application development and was in charge of Multi-Org architecture for a period of time.  EBS Multi-Org is a […]
Categories: BI & Warehousing

Cloud BI Features – Amazon QuickSight

Sat, 2015-10-17 12:56
Here is a list of features available from Amazon QuickSight: Data Source Connect to supported AWS data sources Data Source Upload flat files Data Source Access third-party data sources Data Preparation Data Preparation Tools Visualization Build Visualizations Visualization Access all chart types Visualization Filter Data Data Access Capture and Share, Collaborate Data Access API/ODBC connection […]
Categories: BI & Warehousing

Data Mashup in OBIEE 12c

Wed, 2015-10-14 06:49
Data Mashup is a new feature from OBIEE 12c. It is one of the two main features that OBIEE 12c.  The other one is the visual analyzer. When I tested the data mashup features, it supports these two scenarios.  Extensible Attribute – Extended Dimension Attribute External Benchmark – Extended Fact Both features are accomplished without […]
Categories: BI & Warehousing

Amazon Quick Sight – BI on Cloud?

Thu, 2015-10-08 08:08
In my post Data Warehouses on Cloud – Amazon Redshift, I mentioned that what would be really useful is providing BI on Cloud, not just Data Warehouse on Cloud. I felt that BICS makes more sense comparing to Amazon Redshfit. I discussed with a couple of people last night in a meetup.  Some of them […]
Categories: BI & Warehousing

Do we really need semantic layer from OBIEE?

Mon, 2015-10-05 09:22
Not all BI tools have the semantic layer.  For example, Oracle Discoverer seems not having a strong semantic layer. This page summarizes what OBIEE semantic layer can do for you… BI Platform Semantic Layer I think that if these features can be accomplished in other ways and can be proven that they are not necessary, […]
Categories: BI & Warehousing

Data Lake vs. Data Warehouse

Sun, 2015-10-04 17:18
These are different concepts. Data Lake – Collect data from various sources in a central place.  The data are stored in the original form.  Big data technologies are used and thus the typical data storage is Hadoop HDFS. Data Warehouse – “Traditional” way of collecting data from various sources for reporting.  The data are consolidated […]
Categories: BI & Warehousing

Use DMZ to access BI from outside firewall

Fri, 2015-10-02 13:12
DMZ is a technology that allows you to configure your network to be accessible outside firewall. Some of users may want to access some of corporate reports from mobile or from their personal computers. While VPN and Citrix may be useful for these cases, DMZ can provide another option. A good article – OBIEE Security […]
Categories: BI & Warehousing