Informix

A relational database management system developed by Infomix Software of the United States. Informix is ​​available in Informix-SE and Informix-Online versions. Informix-SE is designed for UNIX and Windows NT platforms. It is designed for small and medium-sized applications. Informix-Online runs under the UNIX operating system and can provide multi-threaded servers supporting symmetric multiprocessors for large-scale applications. Informix can provide screen-oriented data input queries and a design-oriented query language report generator. Data definitions include defining relationships, revoking relationships, defining indexes, and redefining indexes. Informix can not only build a database, but also can easily reconfigure the database. The protection measures of the system are very sound. Not only can the data be protected from being accessed by users outside the authority, but also the lost files can be re-established and the recovery can be destroyed. The data. The size of its file is not limited by the disk space, the size of the domain and record length can reach 2K. With subscript sequential access method, Informix is ​​compatible with COBOL software and supports C language programs. Informix has strong portability and compatibility, and it has been applied to many microcomputers and minicomputers. It is especially suitable for personnel, storage and financial management of small and medium-sized enterprises.