What is a database?
A database contains a variety of data which are structurally placed in order. They can easily be manipulated, accessed and viewed e.g. a dictionary, timetable or telephone book. A database is like a bank, were you either retrieving the money as well as storing it or you just simply view the amount.
In this database what we can identify are the table, record, field and field value. Firstly the table also known as the File, highlighted in green this contains e.g. record of the entire patients. Moving on to the record which are placed in each row (in red) shows a gathering of data for a specific element. A field or column displayed in yellow is a particular element of data shared to all records. What is a relational database?
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the identical company address. To reduce or getting rid of duplicated data entry instead of typing the address all over again we can instead give it ID for instead ‘S01’ the ID will become the primary key in which we can identify each supplier by the ID. The advantages are that it will take less time to search it on the database in addition to a reduction in the amount of data being kept & input. Plus it could also guide the user in which e.g. selecting the right …show more content…
A simple primary key only contains one field only e.g. Student ID however for a composite primary key more than one field is necessary to find the precise value e.g. cars, the brand and the model of the car . There are many kinds of model for types of brand (Audi, BMW, Citroen, Ford and etc.) using composite primary key you can uniquely identify each car from the same brand in the database.
A table can have single or multiple foreign keys, a primary key and Foreign key are linked together to create a relationship between the tables (entities), this happens when both tables (and more) have found the same primary key. Both primary keys can’t have the same name so we call one of them a foreign key.
When a relationship is linked between two tables from a primary key to a foreign key, a referential integrity is necessary therefore that we can’t change any data from the foreign key (table) however only can change it in the primary key (table) to avoid any pointless
A database is for the most part utilized for putting away related, organized information, with all around characterized information positions, in a productive way for addition, redesign and/or recovery (contingent upon application). Then again, a record framework is a more unstructured information store for putting away discretionary, presumably disconnected information. The record framework is more broad, and databases are based on top of the general information stockpiling administrations gave by document frameworks. There are additionally contrasts in the normal level of administration gave by document frameworks and databases. While databases must act naturally reliable at any moment in time (consider banks following cash!), give confined exchanges and sturdy composes, a document framework gives much looser
If the data requested is to fetch child keys, the DBEngine requests for metadata from Index Engine. The metadata contains the child key list. The data is then displayed to
Medical patient records are organized documents created to obtain patient medical history and previous care. Medical records are personal documents stored by the health care provider. Each medical record has enough information to distinguish each patient. It contains their first and last name, gender and age. Every patient's medical records are different, some contain more information due to their medical history.
- Trait like model represents one factor, meaning that each relationship will display the same attachment
From the scenario described above, I have determined that the following main entities are the most appropriate for a relational database: cemeteries, burial plots, burial records, monuments, buildings, and inscriptions. Each main entity and its significant attributes will be described below; however, a full list of attributes can be found in the appendix.
This database was created as an intelligent clinical database for records at the time of the care.
A database is a collection of data which is organized and easy for users to find data. Database can record massive amount of data, it can be use for business and organization’s purpose. Every organization should have database security to secure the information of the organization.
C. Electronic Health Record Storage The use of clinical data for research is a widely anticipated benefit of the electronic health record (EHR). Clinical data stored in structured fields is relatively straightforward to retrieve and use; however, a large proportion of EHR data is “locked” in textual documents. EHR chart notes are typically stored in text files, which include the medical history, physical exam findings, lab reports, radiology reports, operative reports, and discharge summaries. These records contain valuable information about the patient, treatment, and clinical course.
Databases are becoming as common in the workplace as the stapler. Businesses use databases to keep track of payroll, vacations, inventory, and a multitude of other taske of which are to vast to mention here. Basically businesses use databases anytime a large amount of data must be stored in such a manor that it can easily be searched, categorized and recalled in different means that can be easily read and understood by the end user. Databases are used extensively where I work. In fact, since Hyperion Solutions is a database and financial intelligence software developing company we produce one. To keep the material within scope I shall narrow the use of databases down to what we use just in the Orlando office of Hyperion Solutions alone.
Inconsistently storing organization data creates a lot of issues, a poor database design can cause security, integrity and normalization related issues. Majority of these issues are due to redundancy and weak data integrity and irregular storage, it is an ongoing challenge for every organization and it is important for organization and DBA to build logical, conceptual and efficient design for database. In today’s complex database systems Normalization, Data Integrity and security plays a key role. Normalization as design approach helps to minimize data redundancy and optimizes data structure by systematically and properly placing data in to appropriate groupings, a successful normalize designed follows “First Normalization Flow”, “Second Normalization Flow” and “Third Normalization flow”. Data integrity helps to increase accuracy and consistency of data over its entire life cycle, it also help keep track of database objects and ensure that each object is created, formatted and maintained properly. It is critical aspect of database design which involves “Database Structure Integrity” and “Semantic data Integrity”. Database Security is another high priority and critical issue for every organization, data breaches continue to dominate business and IT, building a secure system is as much important like Normalization and Data Integrity. Secure system helps to protect data from unauthorized users, data masking and data encryption are preferred technology used by DBA to protect data.
Not only does Oracle allow you to link multiple tables, it also maintains consistency between them. It can prevent you from deleting a department which still has employees in it. Or if you change an employee's ID number, then all records of their work hours will also reflect that change. Ensuring that the data among related tables is correctly matched is referred to as maintaining referential integrity. This also applies to the previous example where a user enters an invalid department number for an employee. Oracle won't accept a department number that isn't in the DEPARTMENT table.
The DBMS has a function that can be differentiate from the information retrieval system. The DBMS have the ability to store, update and retrieve the data. This is the main function of the DBMS because the database can be used if there is any record is being stored into the database. The record need to be retrieve first, then it can be change by the database administrator as it will be the record has been updated. The DBMS will protect the structure of the data structure.
“Partial dependency exists when there is a functional dependency in which the determinant is only part of the primary key” (Morris 196). “Transitive dependency exists when there are functional dependency such that X->Y, Y->Z, and X is the primary key” (Morris 196). The ultimate goal of the database designer is to reduce the dependency without sacrificing too much performance. Because when you create another entity to eliminate the dependency, the query will need to join with another table to get data which will consume more resources. To illustrate how important the functional dependency is in the data normalization process, we will look at an example with the table Course (ID, Course_Title, Course_Credit, Academic_Level, Tuition_Rate).
In our world, people rely heavily on the power of technology every day. Kids are learning how to operate an iPad before they can even say their first word. School assignments have become virtual, making it possible to do anywhere in the world. We can receive information from across the world in less than a second with the touch of a button. Technology is a big part of our lives, and without it life just becomes a lot harder. Just like our phones have such an importance to us in our daily lives, database management systems are the same for businesses. Without this important software, it would be almost impossible for companies to complete simple daily tasks with such ease.
Technology has changed modern society drastically, both positively and negatively. Technology has influenced every aspect of our life, making it simpler but not necessarily better. Albert Einstein was concerned about the advancement of technology. "I fear the day that technology will surpass our human interaction."1 Undoubtedly, what has changed the most are communication, the spread of information, and how business is practiced. Consequently, practically everyone knows how to use a computer, connect to the Internet, or use a smartphone. This is demonstrated by the way the Internet is used daily by millions of people to communicate, to sell, advertise, retrieve, and share information. Thanks to the Internet, information from anywhere in the world is at our fingertips. As a result, the advancement of technology has changed our life in many ways including; sharing of information, communication, business, education, social interaction, simplifying everyday tasks, replacing basic skills and jobs.