Define database. Describe the structure of database.
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Define database. Describe the structure of database.
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Data are basic facts or values. Every task a computer carries out works with data in some way. Without data, computers would be pretty useless. It is therefore important to understand what data are and how to represent and organize data. The term 'data' is considered plural in the scientific community, as in 'The data are collected,' not 'The data is collected.' However, not everyone follows this, so sometimes you will see 'data' used as singular.
Explanation:
Database Structure
A database is an organized collection of data. Instead of having all the data in a list with a random order, a database provides a structure to organize the data. One of the most common data structures is a database table. A database table consists of rows and columns. A database table is also called a two-dimensional array. An array is like a list of values, and each value is identified by a specific index. A two-dimensional array uses two indices, which correspond to the rows and columns of a table.
In database terminology, each row is called a record. A record is also called an object or an entity. In other words, a database table is a collection of records. The records in a table are the objects you are interested in, such as the books in a library catalog or the customers in a sales database. A field corresponds to a column in the table and represents a single value for each record. A field is also called an attribute. In other words, a record is a collection of related attributes that make up a single database entry.
The example shows a simple database table of customers. Each customer has a unique identifier (Customer ID), a name, and a telephone number. These are the fields. The first row is called the header row and indicates the name of each field. Following the header row, each record is a unique customer.
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Database Structure. A database is an organized collection of data. Instead of having all the data in a list with a random order, a database provides a structure to organize the data. One of the most common data structures is a database table. A database table consists of rows and columns.