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Normalization is a process of reducing redundancies of data in a database. If you don't normalize you will have to repeat data entry.
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What is a Un-normalize database?
An un-normalized database contains a random population of data that has not been organized into small stable data files
What are the disadvantages of normalizing a table in a database?
All databases tend to be normalized to some degree; in fact, a relational database almost must adhere to a minimum of 1NF to be useful. However, the more a database is normalized, the greater the impact of processing time of queries is likely to be. For one thing, higher levels of normalization results in larger numbers of decode tables and the like, requiring more table joins in retrieval queries and more referential integrity overhead.
Why is it important to test a database?
Many applications today rely on a backend database in order to function. If the database is not working properly, then the entire application is typically inaccessible because so much information including logins are stored in the database. Databases should be tested for boundary conditions, stress, function, and structure to ensure that everything is working as designed.
What is the ranges of database?
ranges of database
What is the definition of database clustering?
Database is defines as a collection related records/data. When the data in the database is grouped based on some classification it is called database clustering.
What is the primary deliverable from logical database design?
normalized relations
What is a Un-normalize database?
An un-normalized database contains a random population of data that has not been organized into small stable data files
What are the disadvantages of normalizing a table in a database?
All databases tend to be normalized to some degree; in fact, a relational database almost must adhere to a minimum of 1NF to be useful. However, the more a database is normalized, the greater the impact of processing time of queries is likely to be. For one thing, higher levels of normalization results in larger numbers of decode tables and the like, requiring more table joins in retrieval queries and more referential integrity overhead.
What is a third normal form?
Third normal form is used to describe a database that has been normalized. Normalization is a process of removing redundant data. A third normal form is a database that has no transitive dependencies and has all the characteristics of the second normal form.
Why are forms an important part of a database?
the function of the database
Why is a Key important in a database?
a key is important in a database because using of that key only we can identify a unique attribute.
Why is it important to have database?
the database is used to maintain the data properly and it is easy to recover.
Why database important?
A database is important because it stores a lot of information. This information can later be used in cases of emergency or reference.
What impact does normalization have on writing queries?
The most important thing about normalization of tables in a database for the purposes of query writing is to allow only the data wanted to be returned and you don't end up with what is called a Cartesian product... where it is possible that all rows are returned in error because the keys from table to table are not normalized correctly.
Is it important to save a database?
YEAH
How important is database in business?
we get our work done more quickly and efficiently due to database
What are the major inputs into physical database design?
~Normalized Relations, volume estimates, attribute definitions, response time expectations, data security needs, backup/recovery needs, integrity expectations, DBMS technology used
