Database Column

Database Column

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A database column, sometimes referred to as a field, is a set of data values of a particular type in a database table. Each column has a unique name and the data in the column is all related to that name.

Columns represent the different categories of data stored in a table. For instance, in a table representing employees in a company, each row could represent a unique employee, and each column could represent a different piece of information about that employee, such as Employee_ID, First_Name, Last_Name, Email, Job_Title, and so on.

Each column in a table is designed to store a certain type of data, such as text, numbers, dates, etc. This type of data is specified when the table is created, in a step known as defining the schema. For example, the ‘Email’ column would be designed to hold text data, while a ‘Birth_Date’ column might be designed to hold date data.

It’s important to note that in a relational database, the order of columns in a table doesn’t matter, since data is typically accessed via SQL queries that specify the names of the columns they want to work with, rather than their positions in the table.

In conclusion, a database column represents a specific type of information that you want to store about the objects represented in your database table.

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