I need to learn how to create a constraint in SQL Server database that will serve the following purpose (I will demonstrate on simple example):
Parent Table Structure:
FALIAS CHAR(20)
FENTRY CHAR(10)
FPK I (Primary Key)
(Expression FALIAS + FENTRY is a candidate index key)
Child Table Structure (Simplified):
FENTRY CHAR(10)
When user adds a record to the Child table and the value set to the field FENTRY does not exist in the Parent table I want SQL Server to reject the entry.
How do I do it?
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