ABAP - Tables_Input Check

Important Notes:

1) Foreign keys can only be used in screens. Data records can be written to the table without being checked using an ABAP program.

2) In ABAP Dictionary, relationships between two tables are called foreign keys and they must be defined explicitly for the fields.

3) Foreign keys are used to ensure that the data is consistent. Data that has been entered is checked against existing data to ensure that it is consistent.

4) Domain equality is essential. Different data elements can be used, but they must refer to the same domain.

SAP screens:

Step 1:

Step 2:

Step 3:

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Step 5:

Step 6:

Vobaculary:

a) foreign key - A combination of fields in a table is called a foreign key if this field combination is the primary key of another table.

b) check table - The check table is the table whose key fields are checked. This table is also called referenced table.

c) check field - The field of the foreign key table to be checked is called the checked field.

What is?
Check Table not Equal to Value Table./ The system proposal is then the value table of the domain.