You have created table ZTAB and you want to create a foreign-key relationship to table SAPTAB. Under which condition is this possible?

The creation of a foreign-key relationship between two tables in SAP is contingent on specific data compatibility conditions. The correct condition is that the check field in the new table ZTAB must have the same domain as the corresponding field in the reference table SAPTAB.

Domains define the technical characteristics of a field, including its data type and length, which are essential to ensure data integrity when establishing relationships between tables. If the domains match, it guarantees that both fields can hold the same type of data and that values from one can appropriately be linked to values in the other. This alignment is crucial to maintaining referential integrity within the database structure.

In contrast, the other options do not adequately meet the requirements for establishing a foreign-key relationship. While having a matching name, different data elements, or even matching ABAP Dictionary types is important, they do not ensure that the actual values are compatible for relational integrity. Therefore, options that propose mismatches in these areas could lead to inconsistencies in data handling or integrity violations within the SAP system.