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Up and Running with ALLBASE/SQL: HP 3000 and HP 9000 Computer Systems > Chapter 1 Very Basic...
What Is ALLBASE/SQL? |
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ALLBASE/SQL is Hewlett-Packard's proprietary relational database management system. Closely tuned to the architecture of HP computers, ALLBASE/SQL gives you enormous flexibility in designing and using SQL database applications on a small or large scale. ALLBASE is a family of relational database products that includes the components of ALLBASE/SQL and several related tools defined in the following paragraphs. Two components which together form the back end of ALLBASE/SQL. SQLCore accepts SQL statements and processes them; DBCore performs file access operations at the operating system level and also controls concurrent access to data, guaranteeing consistency. To use SQLCore and DBCore, you employ a front-end process, such as ISQL, ALLBASE/Query, or one of your own application programs. An interactive command processor which lets you enter SQL statements at the keyboard and observe query results, messages, and other information on a video display. Remember that SQL is a language--not a software system. So you need an interactive way to submit SQL statements to SQLCore and DBCore for processing. ISQL is the main tool used by ALLBASE/SQL programmers and database administrators to create and modify the schema of an ALLBASE/SQL DBEnvironment. It is also used by anyone who needs to submit queries using the SQL language. ISQL is especially useful for loading and unloading data. A screen-oriented, menu-driven approach to designing queries and producing quick reports from data in ALLBASE/SQL databases. ALLBASE/Query contains extensive online help, so it is especially appropriate for occasional users. A database administrator's tool for displaying and setting the basic parameters of a DBEnvironment (explained further in the next section); storing and restoring DBEnvironments; setting the size of system buffers; and purging DBEnvironments. The database administrator (DBA) is the individual who creates and maintains objects in a DBEnvironment. SQLUtil is seldom needed by the ordinary user. A database administrator's tool that examines the structure of a DBEnvironment and creates files of SQL statements and ISQL commands for unloading it, re-creating it, and reloading it with data. The file for re-creating a DBEnvironment is sometimes known as a schema. The schema shows you all the CREATE statements that went into the original development of the DBEnvironment. A fourth-generation programming tool. ALLBASE/4GL is a screen-oriented, menu-driven environment that lets you design and build complete ALLBASE/SQL applications without conventional programming. Tools that convert source programs containing SQL statements into source code that can be compiled in a programming language of your choice. Different preprocessors let you code applications in C, COBOL, FORTRAN, and Pascal. Software that permits you to set up and maintain DBEnvironments in networks. Through the NETUtil program, you make DBEnvironments on host systems available to local users. Software on MPE/iX systems that lets you attach a TurboIMAGE database to a DBEnvironment and then use SQL to query the TurboIMAGE database as if it were a set of ALLBASE/SQL tables. Software that provides a programmatic interace to ALLBASE/SQL for creating windows-based client-server applications. With ALLBASE/SQL PC API, you use one of several available 4GL tools to build your application, which connects to ALLBASE/SQL over a network through ALLBASE/Net. Software that makes use of ALLBASE/SQL to meet specialized needs. Information Access/PC lets you access ALLBASE/SQL tables from your PC and integrate data from them into PC-based applications. Business Report Writer lets you develop complex reports using ALLBASE/SQL data as well as data from other sources. DB2/CONNECT lets you connect to a mainframe database from an ALLBASE/SQL application. |
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