The initial sector might be located in the Index if your disc employs soft segments. Explain?

How are nulls defined? Which field is not capable of accepting null values? How come?

Delete the OWNER_INDEX 3 index from the OWNER table.

please answer with proper explanation and step by step solution.

I want to ask how to combine 2 data like in Figure 1 and Figure 2 to be like Figure 3. Please do it in SQL

Oracle PL/SQL Implement a trigger to the following constraints: Meter readers can only read a maximum of 5 meters in any given calendar month. Customers who do not pay their bill within 60 days will their water supply cut off. Once a customer has had their supply cut off, the person or business responsible for the bill will not be able to create a new account at a different service address until such time as their arrears have been cleared.

Create a version of the hybrid merge-join method that is suitable for situations where both relations are not physically sorted but have a sorted secondary index on the attributes to be joined?

I am using MySQL and I am creating a college event management database. In the database, I want to add a check constraint that prevents overlapping events when inserted into the events table. The problem I am having is that it seems like it will not allow an alias for the Events table so that I can compare the inserted row to all the other rows in the table. Is it not possible to use aliases in check constraints? ALTER TABLE Events As EADD CONSTRAINT eventOverlap CHECK ((E.LocID=LocID) AND (E.Date=Date) AND ((End-E.Start) > 0) AND ((E.End-Start) > 0))   I have also tried using a select statement I get an error saying "Error Code: 3815. An expression of a check constraint 'eventOverlap' contains disallowed function." ALTER TABLE EventsADD Constraint eventOverlap CHECK (NOT EXISTS (SELECT * FROM Events E WHERE E.LocID = LocID AND E.Date = Date AND ((E.Start <= Start AND E.End > Start) OR (E.Start < End AND E.End >= End))))  OR (E.Start < End AND E.End >= End))…

Explain how referential integrity is established in databases that are SQL:1999 compliant. Explain how the ON UPDATE RESTRICT, ON UPDATE CASCADE, and ON UPDATE SET NULL clauses differ from one another. What happens if the ON DELETE CASCADE clause is set?

Give Seven characteristics of a candidate key