Interested to Buy Any Domain ? << Click Here >> for more details...
What is normalization? Explain different levels of
normalization?
- 8 Answers
- 62726 Views
- CG-VAK, Choice Solutions, College School Exams Tests, IBM, Wipro, I also Faced
- E-Mail Answers
Answer Posted / vikram
The task of a database designer is to structure the data in
a way that eliminates unnecessary duplication and provides a
rapid search path to all necessary information. The process
of refining tables, keys, columns, and relationships to
create an efficient database is called normalization
because there is no redundant, neglected data and normalized
tables produce rapid, efficient joins.
There are 5 different normalization methods.
First Normal Form (1NF): Each field in a table must contain
different information.
Second Normal Form (2NF): All attributes that are not
dependent upon the primary key in a database table must be
eliminated.
Third Normal Form (3NF): No duplicate information is
permitted. So, for example, if two tables both require a
common field, this common field information should be
separated into a different table.
There are 2 more normalization forms, fourth normal form
(4NF) and fifth normal form (5NF), but they are rarely used.
Normalization makes databases more efficient and easier to
maintain.
| Is This Answer Correct ? | 121 Yes | 22 No |
Post New Answer View All Answers
What is data modeling with example?
In which table collections errors are stored.
Explain about the storage and physical database design?
I have a few records all are same structures data, I want to store data in multiple targets how
Which four data types cannot be used as a return type from a user-defined function?
Explain about post-relational databases?
Explain about the hierarchical model of the database?
Explain the rollup operator?
Explain about relational operator join?
What are data modelling techniques?
I HAVE A PI ON COL A THE NEXT DAY I WANT CHANGE THE PI ON COL B? PLS SEND ME THE ANS
Hi my program is accesing data from two db2 databases.what is the bind card for this program to genarate plan? how to specify the two owners and two qualifiers in bind card
Any sample or model question of punjab national bank for deputy manger IT or any sample of PNB.any1 plz do send on
The count() function always returns a int value type what should you do if you need to count rows from a query which you know will return a value that is too large for an int value type?
How you can make a parameterized view?
