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|Interview Questions and Answers|
|Ans. ALTER TABLE <Table_Name> ADD CONSTRAINT <Constraint_Name> FOREIGN KEY (<Column_Name>) REFERENCES <Foreign_Table>(<Foreign_Column>);|
|Help us improve. Please let us know the company, where you were asked this question :|
|Like Discuss Correct / Improve  database  add foreign key constraint|
|What is database deadlock ? How can we avoid them?|
|What is ACID ?|
|What things you would care about to improve the performance of Application if its identified that its DB communication that needs to be improved ?|
|If you are given a choice to implement the code to either Insert a Record or Update if already exist, Which approach will you follow ?|
|What is the use of @GeneratedValue annotation in Hibernate?|
|What is a Database Trigger ?|
|What happens to backups if we delete the RDS instance ?|
|What is a Cursor ?|
|What are temp tables ?|
|Does SQL allow null values ? Can we use it within Where clause ?|