Foreign key integrity Constraint - Type of Constraint in Database
Referential integrity in RDBMS. Foreign Key constraint. Advanced courses : https://bit.ly/3oNeUJN
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Try answering the interview questions - (1) What is the default behaviour of the parent child relationship with respect to deletetion of the parent? (2) What if it is required to be allowed to delete the parent with the related child record existing? (3) Can the foreign key column contain NULL, why?
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