Key Fields in a Database. Keys are crucial to a table structure for many reasons, some of which are identified below: 1  They ensure that each record in a table is precisely identified.  They help establish and enforce various types of integrity.
avifauna definition: The definition of avifauna are the birds that live in a certain place or at a certain time. (noun) An example of avifauna is penguins living primarily in Antarctica. An example of avifauna is the moa of New Zealand becoming extin...
Definition of palm. 1 : any of a family (Palmae synonym Arecaceae) of mostly tropical or subtropical monocotyledonous trees, shrubs, or vines with usually a simple stem and a terminal crown of large pinnate or fan-shaped leaves. 2 : a leaf of the palm as a symbol of victory or rejoicing; also : a branch (as of laurel) similarly used.