Using char and varchar Data. The char and varchar data types store data composed of the following: Uppercase and lowercase characters such as a, b, and C. Numerals such as 1, 2, and 3. Special characters such as the at sign (@), ampersand (&), and exclamation point (!).
Definition of barrier for English Language Learners. : something (such as a fence or natural obstacle) that prevents or blocks movement from one place to another. : a law, rule, problem, etc., that makes something difficult or impossible.
curÂ·tain. n. 1. A piece of fabric or other material that hangs in a window or open space as a decoration, shade, screen, or divider. 2. Something that functions as or resembles a screen, cover, divider, or barrier: the curtain of mist before the mountain; a heavy curtain of artillery fire. 3.