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.
Bar, barrier, barricade mean something put in the way of advance. Bar has the general meaning of hindrance or obstruction: a bar across the doorway. Barrier suggests an impediment to progress or a defensive obstruction (natural or artificial): a trade barrier; a mountain barrier; a road barrier. A barricade is especially a pile of articles hastily gathered or a rude earthwork for protection in street fighting: a barricade of wooden boxes.