... like MS Access and Filemaker there are handy graphical tools for creating and editing table structures. SQL server databases such as MySQL, Postgresql, and MS SQLServer have command line interfaces ... encountered to SQL is Celko, 1995b). Database server software packages (e.g. MS SQLServer, PostgreSQL, MySQL) allow direct entry of SQL statements through a command line client. However, most database ... interface, without the need to write SQL code. While SQL is the language of relational databases, it is quite possible to design, implement, and use relational databases without writing SQL code...