Data is an information of anything facts or observations about people, places, objects, and events as we know that information system is made up of people, processes, software, hardware data through the Internet. This post focuses on what is data ?,How To Organize Data? How to organize data? What is key field? What is real time processing? what is data in computer? How databases are contained, and used data etc.
Some time ago, data was limited to numbers, letters, and symbols entered by keyboards. Now the data is more enriched and includes:
- Audio captured, translated and saved using microphone and voice recognition system.
- Music downloaded from the Internet and collected on smartphones, tablets and other devices. .
- Photographs taken with digital cameras, retrieved by image editing software and shared with others via the Internet.
- Videos taken by digital audio cameras, TV tuner cards, and webcams.
There are two ways or formats to view data. These forms are physical approach and logical approach. The physical approach focuses on the actual format and location of data typically recorded together in twenty-two as digital bits that characterize characters using Unicode-like coding schemes We do. Typically only specific computer professionals belong to the physical point of view. The second form, the logical approach, is fascinated by the meaning, content and context of the data.
The end users and most computer professionals are associated with this approach. They are actually using data with application programs. This chapter presents the logical approach of Data and the way data is literature in details.
How To Organize Data?
Learning how to organize data is the first step to understanding the database. In a logical approach, data is organized into groups or categories. Each group is more complex than the one preceding it.
- Character: Character (letter) is the basic logical data element. It is a single letter, number or special character such as punctuation mark (punctuation), or a symbol like +. .
- Field: The next higher level or group of related characters. In our example, Brown is in a data field with an employee’s last name. It has different characters which last name Let’s make. A data field represents an attribute (description or attribute) of an entity (person, place, thing, or object). For example, an employee is a unit with multiple attributes including his last name.
- Record: A record is a collection of related fields. A record represents a collection of attributes that describe an entity. In our example, the employee’s payroll records contain data fields describing the attributes of this employee. These attributes are first name, last name, employee ID, and salary.
- Table: A table is a collection of related records. For example, the parole table will also contain the payroll information (records) of the employees.
- Database: A database is a unified collection of logically related tables. For example, the Personnel Database would include all related employee towels, including payroll tables and benefits tables.
What Is Key field?
Each record in a table has at least one specific field called a key field. This field, also called primary, uniquely identifies the record. Tables may be related to or linked to other tables by common key fields.
The key for most employee databases is an employee identification number. Key films in various tables can also be used to integrate data into a database. For example, in the Personnel Database, both the Payroll and Benefit Tables include a folded employee ID. Fiberglass can be associated with combining all records with the same field (Employee ID).
Batch vs real-time processing
Traditionally Data is processed in one of two ways. These are batch processing or what we can call “later” and real-time processing or what we can call “now”. These two methods are used to manage common record-keeping activities such as payroll and sales orders. is done.
What is Batch Processing?
Batch Processing: In batch processing, data of several hours, days or even several weeks is stored. It is then processed together as a “batch”. If you have a credit card, your bill may reflect batch processing. That is, throughout the month you buy things and pay them with your credit card. Every time you spend something, an electronic copy of the transaction is sent to the credit card company. At any time of the month,
The data processing department of the company estimates all these transactions (and transactions of many other customers) simultaneously and processes them at the same time, then the company sends you a single bill of the total amount for which you are owned.
What Is Real Time Processing?
Real-Time Processing: Real-time processing called online processing occurs. When data is processed at the time of transaction itself. For example, real-time processing takes place whenever you request money at an ATM.
Later when you provided the account information and requested a special withdrawal, the bank’s computer confirms if you have sufficient funds in your account. If you do this then the money is given to you and the bank immediately updates your account balance.