Explain primary key and composite key.
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Why is databases important in healthcare?
Describe concurrency control.
If I delete a table and then rollback it, do the index on the table remains? What if I drop the table and roll back?Do index on the table remains? What if I truncate the table and roll back? Do the index on the table remains
What are notification services?
Mention the types of join?
user says the db performance is slow or yesterday the query runned 1min and today its taking 30 min. how to trouble shot or were to start with?
Define database model.
Why do we need to use a database?
What is the main difference between union and union all?
Which two can be implemented as a centrally located logical architecture?
Define entity set.
State some commands of ddl in dbms?