SAP / SAP Beginner (0 to 2 yrs) Interview questions
What is a foreign key in SAP table definitions?
A foreign key in the ABAP Data Dictionary links a field in one table to a field in another (the
check table), ensuring that any value entered must already exist in the referenced table — the
same referential integrity concept found in any relational database, but configured through SAP's Data
Dictionary transaction (SE11) rather than raw SQL DDL.
// conceptually, in table VBAK (sales order header): // field KUNNR has a foreign key relationship to table KNA1 (customer master) // ensuring you can't create a sales order for a customer that doesn't exist
Beyond enforcing valid references, a defined foreign key also drives automatic input validation on data entry screens — when a user types a customer number into a field with a foreign key relationship, SAP can automatically check it against the check table and offer a value-help dropdown listing valid entries.
What does a foreign key relationship in SAP's Data Dictionary ensure?
What automatic UI benefit does a defined foreign key provide beyond validation?
More Related questions...
