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DataFlex is a relational database management system, self-described as an ''applications development database'', originated around 1980. It is a relatively early example of a fully fledged and commercially used fourth-generation programming language (4GL). In its early forms, DataFlex was available for Unix, VAX/VMS, TurboDOS, Novell NetWare, CP/M, MS-DOS and OS/2 operating systems. DataFlex is produced by the Data Access Corporation located in Miami. Data Access Corporation was founded in 1976. To date, DataFlex has lasted the course as a niche application development environment. The DataFlex product supports many database environments: Oracle, MS-SQL, IBM DB2, MySQL, PostgreSQL and Pervasive SQL as well as any ODBC database. DataFlex applications are used by around 3 million users worldwide. ==Features== The DataFlex language differentiates itself from other programming languages in the following ways: *Easy switch between database backends, no code change needed. No compilation needed. *Variables are loosely typed. The virtual machine takes care of conversions. *Flexibility; you can define your own commands. *Code compiles to an intermediate byte-code which makes the programs easily portable between operating systems. *No threads or multitasking *Methods can be defined or redefined inside the object definition. *Automatic delegation of messages in the object-oriented programming environment *Embedded Database access is ISAM-based. Can be used royalty free. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DataFlex」の詳細全文を読む スポンサード リンク
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