ABAP (Advanced Business Application Programming) is a high level
programming language created by the German software company SAP. It is
currently positioned as the language for programming SAP's Web
Application Server, part of its NetWeaver platform for building
business applications. Its syntax is somewhat similar to COBOL.
What is an ABAP data dictionary?
ABAP 4 data dictionary describes the logical structures of the objects
used in application development and shows how they are mapped to the
underlying relational database in tables/views.
What are domains and data element?
Domains:Domain is the central object for describing the technical
characteristics of an attribute of an business objects. It describes
the value range of the field. Data Element: It is used to describe the
semantic definition of the table fields like description the field.
Data element describes how a field can be displayed to end-user.
What is foreign key relationship?
A relationship which can be defined between tables and must be
explicitly defined at field level. Foreign keys are used to ensure the
consistency of data. Data entered should be checked against existing
data to ensure that there are now contradiction. While defining
foreign key relationship cardinality has to be specified. Cardinality
mentions how many dependent records or how referenced records are
possible.
Describe data classes.
Master data: It is the data which is seldom changed. Transaction data:
It is the data which is often changed. Organization data: It is a
customizing data which is entered in the system when the system is
configured and is then rarely changed. System data:It is the data
which R/3 system needs for itself.
What are indexes?
Indexes are described as a copy of a database table reduced to
specific fields. This data exists in sorted form. This sorting form
ease fast access to the field of the tables. In order that other
fields are also read, a pointer to the associated record of the actual
table are included in the index. The indexes are activated along with
the table and are created automatically with it in the database.
What is an ABAP/4 Query?
ABAP/4 Query is a powerful tool to generate simple reports without any
coding. ABAP/4 Query can generate the following 3 simple reports:
Basic List: It is the simple reports. Statistics: Reports with
statistical functions like Average, Percentages. Ranked Lists: For
analytical reports. - For creating a ABAP/4 Query, programmer has to
create user group and a functional group. Functional group can be
created using with or without logical database table. Finally, assign
user group to functional group. Finally, create a query on the
functional group generated.
What is BDC programming?
Transferring of large/external/legacy data into SAP system using Batch
Input programming. Batch input is a automatic procedure referred to as
BDC(Batch Data Communications). The central component of the transfer
is a queue file which receives the data vie a batch input programs and
groups associated data into "sessions".
What are the functional modules used in sequence in BDC?
These are the 3 functional modules which are used in a sequence to
perform a data transfer successfully using BDC programming:
BDC_OPEN_GROUP - Parameters like Name of the client, sessions and user
name are specified in this functional modules. BDC_INSERT - It is used
to insert the data for one transaction into a session. BDC_CLOSE_GROUP
- This is used to close the batch input session.
What are internal tables?
Internal tables are a standard data type object which exists only
during the runtime of the program. They are used to perform table
calculations on subsets of database tables and for re-organizing the
contents of database tables according to users need.
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