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What is NULL? Give an example to described testing for NULL in SQL?
The NULL SQL keyword is used to represent either a missing value or a value which is not applicable in a relational table. Consider there is a relation:
Person(id, name, address, phone)Now to search ids and names of person who do not have a phone is: Select id, name from Person where phone is null
assume we have the following apllicationthat model sccer team the games they play and the players inv each teamin the design we want to capture
What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types.
Question: One of the tasks a database management system must perform is to ensure that the data is still intact in the face of software and hardware failure. This task is known
Define value set? Value set: It is a set of values. You do not always need a user to enter junk free text within all the fields. Therefore, Oracle Apps uses value set to valida
We have a buildup of payments that need to be processed. You will need:- To prepare customer account on our site Process payment (you must have working Paypal account to d
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
i am not clear with the climetic condition of the north indian plain. can u plz explain it for me
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Support by Adding Indexes Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the numbe
. Ashutosh Dubey who is the director of Gyan Gurukul want a three-level schema architecture for the Gyan Gurukul Company that provide better security also design a data abstraction
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