In databases, columns may be defined as individual fields within a table. Each field has a name, such as Name, Address, or Phone Number. Therefore, when multiple values from a column are selected, they will all have similar information, such as a list of phone numbers. When defining columns in databases and spreadsheets, it is often possible to specify the type of data, such as a string, number, or date. This helps ensure all the data within a given column has a similar format.
NOTE: While it is easy to get rows and columns confused, just remember that columns are vertical (like the columns used in architecture), while rows are horizontal, like rows of text.