You are reading about which of the following is not a benefit of avoiding redundancy in a database?. Here are the best content from the team C0 thuy son tnhp synthesized and compiled from many sources, see more in the category How To.
Outline
hide
Advantages \u0026 Disadvantages of DBMS
Advantages \u0026 Disadvantages of DBMS
Advantages \u0026 Disadvantages of DBMS
DBMS MCQ [1]
Explanation: The DBMS full form is Database Management System. It is software that is used to store, manipulate, and query records stored in a certain database
Explanation: The DBA full form in DBMS is Database Administrator. A DBA is an individual who handles and manages the database and ensures that data is correctly stored and retrieved
Other important things that are managed by a DBA are security, troubleshooting, recovery, etc. If the DBS designs a good database then the query is also faster and hence improves the overall functionality of the databases.
What is Data Redundancy? [2]
Data redundancy refers to the practice of keeping data in two or more places within a database or data storage system. Data redundancy ensures an organization can provide continued operations or services in the event something happens to its data — for example, in the case of data corruption or data loss
Data redundancy can occur within an organization intentionally or accidentally. If done intentionally, the same data is kept in different locations with the organization making a conscious effort to protect it and ensure its consistency
If carried out by accident, duplicate data may cause data inconsistencies. Even though data redundancy can help minimize the chance of data loss, redundancy issues can affect larger data sets
Minimize the Number of Data Transfers [3]
In every Open SQL statement, data is transferred between the application server and the database system. Furthermore, the database system has to construct or reopen the appropriate administration data for each database access
When you change data using INSERT, UPDATE and DELETE, use internal tables instead of single entries. If you read data using SELECT, it is worth using multiple operations if you want to process the data more than once, other wise, a simple select loop is more efficient.
Avoid accessing the same data more than once (for example, SELECT before an UPDATE or DELETE).. A simple SELECT loop is a single database access whose result is passed to the ABAP program line by line
The Problem of redundancy in Database [4]
Redundancy means having multiple copies of the same data in the database. This problem arises when a database is not normalized
As it can be observed that values of attribute college name, college rank, and course is being repeated which can lead to problems. If a student detail has to be inserted whose course is not being decided yet then insertion will not be possible till the time course is decided for the student.
If the details of students in this table are deleted then the details of the college will also get deleted which should not occur by common sense. This anomaly happens when the deletion of a data record results in losing some unrelated information that was stored as part of the record that was deleted from a table.
What is Data Redundancy – Definitions and Drawbacks [5]
Data redundancy occurs when the same piece of data is stored in two or more separate places and is a common occurrence in many businesses. As more companies are moving away from siloed data to using a central repository to store information, they are finding that their database is filled with inconsistent duplicates of the same entry
Sometimes data redundancy happens by accident while other times it is intentional. Accidental data redundancy can be the result of a complex process or inefficient coding while intentional data redundancy can be used to protect data and ensure consistency — simply by leveraging the multiple occurrences of data for disaster recovery and quality checks.
This allows you to easily update all records of redundant data when necessary. When data redundancy isn’t purposeful, it can lead to a variety of issues which we’ll discuss below.
5 alternatives to redundancy [6]
Redundancies can be somewhat of a minefield for employers, with a variety of rules and processes which must be followed in what can already be a fraught situation within an organisation when headcount needs to be reduced. Most employers are keen to avoid dismissing staff in whom they have invested time and money but this is not always possible, particularly during tough economic times, and staffing costs are often an employer’s largest overhead.
Before seeking to reduce the number of employees by way of dismissals, the first step when employee costs are becoming unsustainable is for an employer to halt recruitment of any new roles. This can be a particularly useful option for larger employers or those with a higher rate of staff turnover generally
One potential issue, however, arises if the employer needs to make a specific hire whilst a recruitment freeze is in force (for example, because the particular role is critical to the needs of the business and cannot be left vacant). In these circumstances, if any redundancies are taking place within the business, the employer should consider whether any of its potentially redundant employees might be suitable for the role for which it is hiring (and if not, how this can be justified to redundant staff)
What Is Data Redundancy & How Can You Avoid It? [7]
Data empowers businesses to make effective decisions based on facts instead of guesswork. With the right data in hand, you can shift through the noise and get the right information to make decisions that can fuel your business growth and success
When it comes to dealing with big data sets, data redundancy can be a major challenge your organization may face. Servers are the target destination where all your data stays
By feeding relevant data to your data warehouse, you can make the best use of your storage space and ensure that not even a single byte is wasted or misused. Let’s learn about data redundancy and how you can avoid it.
Optimizing Mysql to avoid redundancy but still have fast access to calculable data [8]
An example for the sake of the question: I have a database which contains users, questions, and answers. Each user has a score which can be calculated using the data from the questions and answers tables
However, if I don’t use a score field, then calculating the score every time would significantly slow down the website.. My current solution is to put it in a score field, and then have a cron running every few hours which recalculates everybody’s score, and updates the field.
Database Normalization – Normal Forms 1nf 2nf 3nf Table Examples [9]
In relational databases, especially large ones, you need to arrange entries so that other maintainers and administrators can read them and work on them. In simple words, database normalization entails organizing a database into several tables in order to reduce redundancy
In this article, we’ll look at what database normalization is in detail and its purpose. We’ll also take a look at the types of normalization – 1NF, 2NF, 3NF – with examples.
It helps you avoid redundancy and maintain the integrity of the database. It also helps you eliminate undesirable characteristics associated with insertion, deletion, and updating.
Database Design Bad Practices [10]
Database Design Bad Practices: Are You Making These Mistakes?. Flaws in your database design are like cracks in your application’s foundations
In this article, Toptal Freelance Software Engineer Fernando Martinez discusses some of the most common database design bad practices and how to avoid them.. Flaws in your database design are like cracks in your application’s foundations
In this article, Toptal Freelance Software Engineer Fernando Martinez discusses some of the most common database design bad practices and how to avoid them.. Fernando is a veteran systems and computing engineer with 30 years of experience
Data Redundancy: What Is It and How to Avoid It? [11]
Data redundancy refers to storing the same data in more than one place. This happens in nearly every business that doesn’t use a central database for all its data storage needs
Duplicated information does not only make your database inconsistent but can also significantly skew your data insights, leading to less efficient or unsuccessful business decisions. The following sections introduce you to a quick guide to data redundancy and how you can avoid it.
For instance, you store all of your sales data, including each customer’s sale and their address. In this list, the same address will appear repeatedly in the case of regular customers, leading to redundant data if you want to identify all of your customers, for instance.
6 Database Management [12]
Data are the principal resources of an organization. Data stored in computer systems form a hierarchy extending from a single bit to a database, the major record-keeping entity of a firm
Bit (Character) – a bit is the smallest unit of data representation (value of a bit may be a 0 or 1). Eight bits make a byte which can represent a character or a special symbol in a character code.
A data field represents an attribute (a characteristic or quality) of some entity (object, person, place, or event).. Record – a record represents a collection of attributes that describe a real-world entity
Normalization [13]
Illogically or inconsistently stored data can cause a number of problems. In a relational database, a logical and efficient design is just as critical
Most of these problems are the result of two bad design features called: redundant data and anomalies. Redundant data is unnecessary reoccurring data (repeating groups of data)
Basically, normalization is the process of efficiently organising data in a database. There are two main objectives of the normalization process: eliminate redundant data (storing the same data in more than one table) and ensure data dependencies make sense (only storing related data in a table)
Sources
- https://www.scaler.com/topics/dbms-mcq/
- https://www.techtarget.com/searchstorage/definition/redundant
- https://help.sap.com/doc/saphelp_nw73ehp1/7.31.19/en-us/aa/47349a0f1c11d295380000e8353423/content.htm
- https://www.geeksforgeeks.org/the-problem-of-redundancy-in-database/
- https://www.talend.com/resources/what-is-data-redundancy/
- https://www.waterfront.law/5-alternatives-to-redundancy/
- https://www.datachannel.co/blogs/what-is-data-redundancy-how-can-you-avoid-it
- https://stackoverflow.com/questions/2840357/optimizing-mysql-to-avoid-redundancy-but-still-have-fast-access-to-calculable-da
- https://www.freecodecamp.org/news/database-normalization-1nf-2nf-3nf-table-examples/
- https://www.toptal.com/database/database-design-bad-practices
- https://coresignal.com/blog/data-redundancy/
- https://www.umsl.edu/~joshik/msis480/chapt06.htm
- https://condor.depaul.edu/gandrus/240IT/accesspages/normalization3.htm
