ABAP  is a programming language developed by SAP for the interactive development of application programming.  ABAP/4  is a fourth generation language. ABAP/4 is tightly integrated across all the modules viz like SD, MM, HR etc and most or all of the modules and transactions(like screens are created using ABAP).  All application programs, along with parts of the R/3 Basis system, are written in the ABAP Workbench using ABAP, SAP’s programming language. The individual components of application programs are stored in a special section of the database called the R/3 Repository. The R/3  repository serves as a central store for all of the development objects in the R/3 System.

Get an overview about Development Classes, transport organizer, Interfaces, Understanding your role as an ABAP developer, Dialog Programming, BDC, SAP Scripts, Enhancements and some of the ABAP syntax.

Download the manual on overview of ABAP (194).

Create SID for 0SalesEmply
Data Flow for ODS
Delete bad request from data target and reran request
Errors to be turned to green
Historical DataLoad (Flat Files)
How to  activate and fill aggregates
How to  change the owner of a job
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Well, some more BW Presentations:

BW is SAP’s Data Warehouse offering. BW replaces selected R/3 information systems over a period of time. End to End open DW Solution – all in one package comprising data extractors, administrator workbench, OLAP engine and a graphical user interface. It is pre-configured for the needs of the business users with delivered Cubes, reports, templates.

Front-End (BEx Analyzer)- provides access to the data via internet, intranets or extranets.  Presentation backend is MS Excel. Open solution that allows data to be loaded from practically any source or system, including 3rd party systems and legacy applications. You can also use 3rd party extracting / reporting tools via BAPI’s. BW changes the focus from Build to Buy and it provides faster integration and implementation.

Understand a lot more about General, Architecture and Reporting in this manual on BIW Overview (171)

InfoObjects are the “smallest available information modules” (=fields) In SAP BW: These can be uniquely identified with their technical name. As components of the Metadata Repository, InfoObjects contain the technical and specialist information for master-and transaction data in SAP BW. InfoObjects are used throughout the system to create structures and tables. These enables information to be modeled in a structured form in SAP BW. InfoObjects are used for the definition of reports, to evaluate master-and transaction data.

SAP delivers InfoObjects within Business Content (BCT). The technical name of standard InfoObjects begins with 0. As well as these, you can also define your own InfoObjects. Make sure the technical name begins with a letter between A and Z and that it is 3-9 characters in length.

InfoObjects are divided into the following classes:

• Key Figures – Key figure InfoObjects provide the values to be evaluated. Example: – Quantity (0QUANTITY) ,  Amount (0AMOUNT).
• Characteristics – Characteristic InfoObjects are business reference objects, which are used to analyze key figures.

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