A multi-user dungeon (MUD) is both a style of role-playing game and the name of one of the original text-based multiplayer online role-playing games of this genre. MUD was created by Roy Trubshaw and Richard Bartle in 1980. MUD was modeled after earlier text-based adventure games and became a popular game to play over Telenet, an early commercial...
In general, an attribute is a characteristic. In a database management system (DBMS), an attribute refers to a database component, such a table. It also may refer to a database field. Attributes describe the instances in the row of a database.
Think of a table in a relational database as being analogous to a spreadsheet. An attribute is simply one non-null cell in the spreadsheet, or the conjunction of a column and row. It stores only one piece of data about the object represented by the table in which the attribute belongs. For example, the attributes in an invoice might be price, number, date or paid/unpaid, etc.
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