varchar

varchar
A text field of indeterminate length in a database, as opposed to the traditional fixed-length field.

Be aware that varchars will in general provide slower updates but faster selects. By definition, the amount of storage they use is variable.


Wikipedia foundation.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Varchar — A varchar or Variable Character Field is a set of character data of indeterminate length. The term varchar specifically refers to a data type of a field (or column) in a database management system. Varchar fields can be of any size up to the… …   Wikipedia

  • varchar — Le varchar (issu de l anglais variable character field) est un type de données utilisé par les systèmes de gestion de base de données (SGBD) pour allouer de l espace mémoire dynamiquement aux chaînes de caractères stockées, c est à dire sans… …   Wikipédia en Français

  • тип данных VARCHAR — Стандартный тип данных Oracle, используемый для хранения символьных (алфавитно цифровых) данных, аналогичный типу данных CHAR. В СУБД Oracle V6 типы данных CHAR и VARCHAR полностью эквивалентны. В сервере Oracle тип данных CHAR имеет… …   Справочник технического переводчика

  • Comparison of relational database management systems — Programming language comparisons General comparison Basic syntax Basic instructions Arrays Associative arrays String operations …   Wikipedia

  • Gadfly (database) — Gadfly is a relational database management system written in Python. Gadfly is a collection of Python modules that provides relational database functionality entirely implemented in Python. It supports a subset of the standard RDBMS Structured… …   Wikipedia

  • Pro*C — [pɹoʊˈsiː]/Pro*C++ [ ˈplʌs ˈplʌs] ist ein Precompiler des Unternehmens Oracle für die Programmiersprache C und C++. Mittels des Precompilers ist es möglich, SQL Ausdrücke und normale C oder C++ Quellcode Elemente miteinander zu vermischen. Dies… …   Deutsch Wikipedia

  • Junction table — In database management systems following the relational model, a junction table is a table that contains common fields from two or more tables. It is on the many side of a one to many relationship with each of the other tables. Junction tables… …   Wikipedia

  • Table de décision — Une table de décision est un outil logique permettant de modéliser facilement un ensemble de choix d’une certaine complexité. Au lieu d’obtenir une série de conditions imbriquées par une succession de SI..., ALORS..., SINON..., il est possible de …   Wikipédia en Français

  • Identity column — An Identity column is a column ( also known as a field ) in a database table that (1) uniquely identifies every row in the table, and (2) is made up of values generated by the database. This is much like an AutoNumber field in Microsoft Access or …   Wikipedia

  • Base de datos objeto-relacional — Este artículo o sección sobre informática necesita ser wikificado con un formato acorde a las convenciones de estilo. Por favor, edítalo para que las cumpla. Mientras tanto, no elimines este aviso puesto el 4 de septiembre de 2010. También puedes …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”