ABAP by Ajay

 1. What is BDC? * BDC is used to upload the data from flat file to SAP system.

  BDC - Batch data comminication     *  BDC is used to upload the data from flat file to SAP system.    Task - Create material data using BDC concept.     1. Goto T-code SHDB.        2.  Click on new recording.        3.  Give recording name and T-code and click on start recording.                    4. Give material number, industry sector and material type and click on select view as basic data and click Enter.                    5. Give material description and unit of measure and click on save and save the recording.                6. Go back and select the recording and click on program and give program name and select transfer from recording and select the package.                 7. ...

  BDC     *  Used to transfer data from Legacy system to SAP system.     *    Principle - BDC works on the principle of screen recording.     * T-code - SHDB.     *   Precautions for recording            - never use F4 & F1 help.          - Do not pass wrong value.     * There are 3 methods.          - Call transaction method.          - Session method.          - Direct input method.          --> Call transaction method and session method are also called as batch input method.

  Data migration         *  It is also called Data transfer.          *  Data migration means migrating the data from legacy system to SAP system.          * Legacy system - NON SAP system. Steps of data migration.     1. Extracting the data - Extracting the data from legacy system into a file.     2. Converting the data - Converting the data to appropriate format and also called conversion.     3. Importing the data - Importing the data into SAP system.     4. Verifying the data - Checking accuracy of data in SAP system. Data migration techniques/Tools.      1. BDC - B atch data communication.      2. LSMW - Legacy system migration workbench.      3. BAPI - Business application programming interface.