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...
privÂ·et. n. 1. Any of various shrubs of the genus Ligustrum, especially L. vulgare, having opposite leaves and clusters of white flowers and widely used for hedges. 2. Any of several similar or related plants.rivÂ·et. n. 1. Any of various shrubs of the genus Ligustrum, especially L. vulgare, having opposite leaves and clusters of white flowers and widely used for hedges. 2. Any of several similar or related plants.