Since it is written to yourself, you don't need to start from the foundation, you will accumulate a little bit.
A large feature of SAP is amazing data volume, and there are many tables.
Going from the table:
The SAP system contains the following types:
Transparent table
Each transparent table has a corresponding physical table in the database. Logical table in the physical table and logic form in the data dictionary
The name of the definition is consistent. All transactions and application data are stored in transparent tables.
structure
Structure does not have data records in the database. The structure is used to define the interface between the program or between the program and the screen.
Additional structure
Additional structural definition fields, this field belongs to other forms or structures, but in the correction management as a single
Diographic object.
Storage table
The storage table can be used to store control data (eg, screen order, program parameters, or temporary data). Several deposits
The reservoir can be combined into a reply library. A physical table library in the database and database is consistent. It contains each group
All records assigned to it.
Cluster table
Continuous text, such as documentation, can be stored in a cluster table. Several clusters can be combined into a cluster. In this way
Table type, several logical lines in different tables are combined to a physical record. This can realize an object to pick an object
One premise of storage or access, a table in the access cluster is that at least a portion of the keyword must be in line with. several
The cluster table is stored in a corresponding table in the database.
