BDC(Batch Data Communication) is a batch interfacing technique which is used to insert mass data into SAP R/3 system, in BDC the data will be loded into R/3 using SAP Screen which we use to create a record(Example: Material in MM01).In simple BDC is a technique in SAP, which is used to upload mass data into R/3 server from a flat file( .txt, Excel etc).

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2. What is BDC in SAP ? Types of BDC ?
BDC(Batch Data Communication) is a batch interfacing technique which is
used to insert mass data into SAP R/3 system, in BDC the data will be
loded into R/3 using SAP Screen which we use to create a
record(Example: Material in MM01).In simple BDC is a technique in SAP,
which is used to upload mass data into R/3 server from a flat file( .txt,
Excel etc).
In BDC the data will be flowing in SAP R/3 through screens (Ex: MM01), BDC is a inbound
process.
The BDC can be performed in two methods:
● Call Transaction.
● Session Method.

3. CALL TRANSACTION METHOD:
It is the process of transferring the data from flat file into SAP by
calling a transaction through a series of sequence of steps.
Properties of call transaction method
● This method is used for transferring less amount of data(
● This method uses Synchronous and Asynchronous updates.
● This method will update the DB immediately.
● We need to handle the errors and the success messages by
declaring an internal table of type BDCMSGCOLL.
● This method is very fast.

4. BDCDATA is a structure defined with below fields in data dictionary, it holds the
information related to each screen field .
● Program – Name of the program.
● Dynpro – Screen Number.
● Dynbegin – Start the process.
● Fnam – Field name on the SAP screen.
● Fval – Field value on to the field name of SAP screen.
Use of BDCDATA
It is a structure which holds the information related to each screen i.e. program name, screen no, field name, field values,
information of that particular screen to be transferred into the SAP.
In simple words, it holds all the screen related information and field information to be transferred into corresponding SAP
transaction. Program DynproDynbeginFnamFval
SAPLGMM 0060 "X"
RMMG1-MATNR "1011"
RMMG1-MBRSH "FOOD"
RMMG1-MTART "FERT"
 SAPLGMM 0070 "X" RZSEL "X"

5. MODE:
It specifies the type of the mode to execute the transaction.
There are 3 options for mode
● A All screen mode(Foreground).
● E Error screen mode (only error screens will be displayed).
● N No screen mode (Background).
RECORDING METHOD:
Since, it is very difficult to find technical information of each field on the screen, we go for a
method called as “Recording method”.
The recording method is going to record all the fields in the transaction and it generated the
technical information such as program name, screen no, field name, field value for each field on
the SAP screen.
By using the recording method, it is very easy to create a BDC program.

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