What is denormalization and when would you go for it?
- 9 Answers
- 36413 Views
- NBP, I also Faced
- E-Mail Answers
Answer Posted / niraj kumar
Industrial experience---->
Denormalization or Normalization both we use on databse so
that any one can filter as well as retrive the data from
the tabel easily.
Denormalization - As the name suggest it is a reverse
process of normalization, means we fill some redundant data
in table so that user can retrive easily.
But actualy we use the major functionality of normalization
of higher normal form(BCNF, 4TH NF ,5TH NF, DKNF) in lower
normal form (1st and 2nd) because higher normal forms are
so costly to use, thats why we use denormalization to
reduce the cost of normalization.
| Is This Answer Correct ? | 17 Yes | 2 No |
Post New Answer View All Answers
Write short notes on manual refreshes.
What is a database development?
Explain the role of indexing in databases?
Explain the rollup operator?
Who are end users in dbms?
When installing the datastage7.5x2 edtion iam getting aproblem i.e the cpu count is 2 but the cpu count in installation is one . how can i install in my p.c (system is dual core).
1. Using the XML Document below, with the URI “recipe.xml”
define
the following queries in XQuery:
a.) Give the names of all breakfast in the menu.
b.) Select breakfasts that have price lower than $7.00?
How to use timestamp datatypes
A) Which two are benefits of Teradata's support for ANSI Standard SQL? (Choose two.) 1.data is distributed automatically 2.queries get optimized to better plans 3.submit queries from other database systems 4.can interface with BI tools B) Which statement is true when comparing the advantages of third normal form to star schema? 1.Star schema tends to have fewer entities. 2.Star schema requires additional data storage. 3.Third normal form tends to have fewer entities. 4.Third normal form requires additional data storage. C)Which two sets of functions does the Parsing Engine (PE) perform? (Select two.) 1.sorting, formatting, and aggregating of the final answer set 2.flow control of the data to and from the participating tables 3.SQL statement interpretation, syntax validation, and semantic evaluation 4.dispatching the step execution sequence to the AMP via the BYNET D) Which two can be achieved with Teradata Active System Management (TASM)? (Choose two.) 1.disable hardware 2.react to hardware failure 3.influence response times 4.collect metadata E) Which three mechanisms can be used to ensure security within the Teradata Database? (Choose three.) 1.views 2.spool limits 3.roles 4.access rights 5.profiles
In which database can extended stored procedures be added?
Explain about post-relational databases?
Explain the cube operator?
What are the three basic rules which are to be followed for the relational model of the database?
What are the 18 schemas?
Explain about query and reporting.
