Describing the extended star schema of an infocube 8 lesson. Star schema is the backbone of all data warehouse modelling be it sap or oracle. The bi data model is explained in detail in chapter 3, where modeling aspects that are derived directly from the bi data model are also explained. This master data information is stored inseparate tables, called master data tables. Infoobjects can be categorized into the following categories. Star schema can be defined as the collection of database objects which includes the tables, views, indexes and synonyms. As we can see, we can analyze this data using three different lenses or dimensions. It helps convert raw data into information and insights that help improve business margins. Star schema is a model in which fact table surrounded by dimension tables. Starting in power bi desktop with a flat extract of data from our crm system.
Sap bw i about the tutorial sap business warehouse bw integrates data from different sources, transforms and consolidates the data, does data cleansing, and storing of data as well. Schema and types of schema in data warehouse dw bi master. Building a star schema in power bi analytics by big bear. Very often our analysis starts with a flat data set that contains all of the pertinent columns in a single table that looks like the one above. Difference between navigational and display attribute in sap bi. Now let us focus on some interesting points of extended star schema. It means, dimensional tables are surrounded by the fact table. Create a valid schema multidimensional model the star schema classical approach multidimensional star schema in bw extended star schema the olap concept differences between olap and oltp business modeling info area. Remove duplicates, as it is a dimension table and we only want unique values. Bi provides the tools infocube is structured as the star schema and it is a data storage area. A classical star schema is a multidimensional data model.
As the bi data model is based on the star schema, an introduction to the star schema will also be given and some general aspects explained. The star schema consists of one or more fact tables referencing any number of dimension tables. Differences between classical star schema and extended star schema. See section viii of sap note 153967 to check the recommended bi content version for this support package of sap netweaver 7. In the left sidebar, choose database explorer select the required hdi service for which the user has insert privileges on the timerelated tables in the context menu, choose generate time data in the calendar type dropdown list, select the required calendar type in the from year and to year text fields, enter the start year and end year for. Approach, multidimensional star schema in bw extended star schema, the sap fico online training ppt. Data for the tutorial can be obtained by downloading excel file from here. It is called a star schema because the diagram resembles a star, with points radiating from a center.
Star schema is the simplest and most used data warehouse schema. Displaying the configuration of sap bw service api explaining bi content examining the transfer of gl data examining generic datasources enhancing bi content datasources. Sap bibw full training material linkedin slideshare. Bi cubes are based on star schema model, and it has its primary unit as infoobjects. The center of the star consists of fact table and the points of the star are the dimension tables. Sap bwbi consultant course content 40 hours sap bwbi course curriculum. This particular fact table has four main dimensions customer, time, product and staff. This means that the reports will include no transactions from the day the report is physically processed. Star schema olap cube kimball dimensional modeling. In classical star schema, the characteristic record is directly stored in dim tables. The word kimball is synonymous with dimensional modeling.
Introduction to sap business intelligence bi architecture bi platform enterprise data warehousing data modelling enterprise reporting, query and analysis. Infoobjects are used in reports to analyze the data stored and to provide information to decision makers. Discuss the concepts of business intelligence and data warehousing lesson 2. I have several fact and dimension tables and need to load all in my application, however i am in trouble at the time of loading, and when you. Readers, who are familiar with the concepts of the multidimensional data model and the star schema, may therefore want to skip this. In computing, the star schema is the simplest style of data mart schema and is the approach most widely used to develop data warehouses and dimensional data marts. Use features like bookmarks, note taking and highlighting while reading learn sap bi. In classic star schema we can analyze only 16 angles perspectives whereas in extended star schema we can analyze in 16248 angles. The star schema is an important special case of the snowflake schema, and is more effective for handling simpler queries. Extended star schema is a model in which the fact table is surrounded by dimension tables, surrounded by sid tables, surrounded by master data attributes, texts and hierarchies. Sap hana star schema sap hana tutorial for beginners. All sap bi information at one place wednesday, 12 september 2012 the bw extended star schema differs from the basic star schema, in case of extended star schema, we will have fact table connected to the dimension table and the dimension table is connected to the sid table and sid table is connected to the master data tables. The star schema architecture is the simplest data warehouse schema.
The reason behind the name star schema is that this data model resembles a star with ends radiating from the center, where the center refers to the fact table and the radiating points are dimension tables. Similar to every other dimensional model, star schema consists of data in the form of facts and dimensions. Based on the arrangement of database objects in different ways, schema in data warehouse is divided mainly into two types. It also includes data modeling, administration and staging area. In this schema, fact table is in the center, and the dimensional tables are relationally linked to the fact table. Lets understand this with extending the simple example we had in the master data vs transactional data tutorial. Job description for the post of bi architect in schlumberger india technology centre pvt ltd in pune for 8 to 12 years of experience.
You can refer the below link about the star schema and cube design in sap bi. In the mean time below are the steps i used to create my basic star schema. Fact tables, an dimension tables are connected to each other by a 4bye. You will gain full proficiency in learning sap architecture, sap bw modeling, data extraction and the sap bw data schema. Sap bi business intelligence is a leading data warehousing and reporting tool. Sap bi extended star schema by geetha balakrishnan on prezi. For every dimension table, a dim id is generated and it is stored in the fact table. Using the data stored in data warehousec reporting. It is a fairly simple concept and is really important for any kind of analysis.
Difference between extended star schema and star schema. Click here to download this tutorial file very often our analysis starts with a flat data set that contains all of the pertinent columns in a single table that looks like the one above. Most business intelligence data warehouses use what is called a dimensional model, where a basic fact table of data e. It is based on a central fact table surrounded by several dimension tables in the shape of a star hence the name. A star schema is a physical model of the database tables needed to instantiate the logical dimensional model discussed earlier. Star schemas can often appear very much like their corresponding dimensional models. May 19, 2011 april 11, 2012 business intelligence business objects, data warehousing. Training for analytics with business warehouse bw in sap. In classic star schema, dimension and master data table are same. The bw extended star schema differs from the basic star schema, in case of extended star schema, we will have fact table connected to the dimension table and the dimension table is connected to the sid table and sid table is connected to the master data tables. Here, the fact table is surrounded by dimension master data.
This model graphically represents the star, so, it is named as star scheme. Star schema can also be defined as a relational database which also represents the fields in relational database. Basic differences between classic and extended star schema. Sap bwthe main distinction between a classic start schema and sap bw starschema is that in the sap bw star schema the dimension tables do notcontain master data information.
Infoobjects are known as the smallest unit in sap bi and are used in info providers, dsos, multi providers, etc. Databases configured for olap use a multidimensional data model, allowing for complex analytical and adhoc queries with a. How do i find out primary and foreign keys in infocube sap. This is part of the sap bi training videoa series from where i will be explaining the concepts in. The primary key in each dimension table is related to a foreign key in the fact table. Iin classic star schema, dimension and master data table are same. Overview of bw architecture, landscape basic modeling.
Readers, who are familiar with the concepts of the multidimensional data model and the star schema, may therefore want to skip this introducing chapter 2. Sap bi business intelligence sap bpc business planning and consolidation sap bods business objects data services sap bodi. Dimension tables are not equal to master data tables, i. Olap cubes are included in this list of basic techniques because a cube is often the final deployment step of a dimensional dwbi system, or may exist as an aggregate structure based on a more atomic relational star schema.
But in extend star schema, dimension and master data table are different. An infocube consists of several infoobjects characteristics and key figures and is structured according to the star schema. Sap bi business intelligence tutorial difference between extended star schema and star schema. Definitive guide to learn sap bi for beginners kindle edition by rungta, krishna. This intellipaat sap bibw training will let you master the powerful sap business intelligence tool used by some of the biggest enterprises on earth. Due to the temporary closure of training centers current status here, all planned classroom training courses in the affected countries have been converted to our virtual learning method sap live class until further notice thus the original offer is still fully available in these countries for more details please check our faq. This tutorial shows how to create a star schema using power bi desktop. The relationship between the fields and the tables are also defined.
Determining the sap bw star schema designing the dimensions of the sap bw infocube enhanced infoprovider modeling modeling multiproviders modeling an spo. Sap bi bw certification training online course intellipaat. Advantages of using star schema in sap bi extended star schema. Designing the dimensions of the sap bw infocube 15 unit 8. Sap business intelligence bi means analyzing and reporting of data from different.
Sap bwbi stands for business information warehouse, also known as business intelligence. Usually the fact tables in a star schema are in third normal form3nf. Download it once and read it on your kindle device, pc, phones or tablets. In the star schema design, fact table sits in the middle and is connected to other surrounding objects dimension lookup tables like a star.
1059 1157 1122 932 1077 608 1485 134 239 1149 5 1326 488 87 919 97 894 568 222 448 1105 226 303 673 479 347 634 1314 934 1189 1387 505