Which of the following do database developers use to avoid anomalies that can happen when users try to insert edit or delete data?
Relational Database Systems
A primary reason to normalize tables is to avoid anomalies that can arise when we update, insert, or delete tuples in a relation.
Which of the following database architectures is most commonly used?
There are multiple types of database, such as flat-file, network, and hierarchical. The most widely used database is
the relational database
, which is based on a mathematical theory. This course discusses what database and DBMSs are, the different database models and the database architectures.
What is the secure coding technique that organizes data within the database for minimum redundancy?
Normalization
.
Normalization
of a database refers to organizing the tables and columns to reduce redundant data and improve overall database performance. Although there are several normal forms, the first three are the most important.
What is the main drawback of using unstructured information quizlet?
What is the main drawback of using unstructured information?
It makes retrieving data very difficult
. In Robin Dave Hospital, visiting physicians use different spreadsheets to record the name, address, mobile number, and email of clients.
Which of the following is the most widely used database architecture group of answer choices?
Relational databases
are the most popular and widely used databases. Some of the popular DDBMS are Oracle, SQL Server, MySQL, SQLite, and IBM DB2. The relational database has two major advantages: Relational databases can be used with little or no training.
What are 3 types of databases?
- Hierarchical databases.
- Network databases.
- Object-oriented databases.
- Relational databases.
- NoSQL databases.
What are the 5 types of databases?
- 1) Centralized Database. …
- 2) Distributed Database. …
- 3) Relational Database. …
- 4) NoSQL Database. …
- 5) Cloud Database. …
- 6) Object-oriented Databases. …
- 7) Hierarchical Databases. …
- 8) Network Databases.
What are the three data management problems caused by data redundancy?
Problems caused due to redundancy are:
Insertion anomaly, Deletion anomaly, and Updation anomaly
. 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 student.
What is the difference between data redundancy and data inconsistency?
The main difference between data redundancy and data inconsistency is that
data redundancy
is a condition that occurs when the same piece of data exists in multiple places in the database whereas data inconsistency is a condition that occurs when the same data exists in different formats in multiple tables.
What is the advantage of minimizing the data redundancy?
The key benefit to minimising data redundancy is
more efficient storage (less storage required, as only necessary data is stored)
, and greater data integrity, as it is easier to maintain a single set of unique data points, versus multiple duplicates, having to update each and ensure their validity throughout the …
What is the main drawback of using unstructured information?
Requires data science expertise: The largest drawback to unstructured data is that
data science expertise is required to prepare and analyze the data
. A standard business user cannot use unstructured data as it is, due to its undefined/non-formatted nature.
Which statement is true of information systems?
Data into information
is true to information systems. Data are facts that are used by programs to produce useful information.
Metadata can be explained in a few ways: Data that provide information about other data.
Metadata summarizes basic information about data
, making finding & working with particular instances of data easier. Metadata can be created manually to be more accurate, or automatically and contain more basic information.
What are the 4 types of database?
- hierarchical database systems.
- network database systems.
- object-oriented database systems.
Is Postgres faster than MySQL?
PostgreSQL is known to be faster
while handling massive data sets, complicated queries, and read-write operations. Meanwhile, MySQL is known to be faster with read-only commands.
What is the most widely used type of database management system?
The most widely used type of database management system is
Relational Databases
.
