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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
er diagram on cosmetics.
give some example real life situation where DBMS are most suitable
Which file organization provides very fast access to any arbitrary record of a file? Hashed file organization provides very fast access to any arbitrary record of a file.
Explain the Query Processing Data Query Processing permits a user to report or analyze structured and unstructured data pulled from multiple data sources.
Security: In a centralised system, access to the data can be simply controlled. Though, in a distributed DBMS not only does access to replicated data have to be controlled in many
Introductory course and so does not require any fancy coding. I will provide a guidance document to help you in producing the solutions.
1. Based on the dependency diagram, create a database whose tables are in at least 2NF, showing the dependency diagram for each table (as shown in class). Label the types of depe
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
various techniques of hashing?
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