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A constraint named less_than_20 was defined on the field date_of_birth of table student. Delete this constraint. ALTER TABLE student DROP CONSTRAINT less_than_20;
Data slice explanation
Types of Data fragmentation
Consider a systems development project with the following data Activity Duration (weeks) Precedence Relationship 1. Software design
Define two-phase locking protocol. Ans: Two-phase locking is significance in the context of ensuring that schedules are serializable. The two-phase locking protocol defines a p
Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.
Timestamps For Read operations: If TS (T) If TS (T) >= W-timestamp (Q), then the transaction T is trying to read a value of data item Q which has been written and committed
What are the advantages of creating a table from existing table?
What is data integrity? Ans: It is the data consisted of in database that is accurate and consistent. (Data integrity means that the data should be valid as per to the give
Have database built but having problems with some questions that go with the database
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