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Command Language  Interface

 

Empress Command Language Interface is a Host Language Interface, it allows SQL commands to be issued from the operating system, or within a program. There are three types of Command Language Interface:   

UNIX/Linux Shell and Windows Batch Interface

The Shell Interface allows a shell program to execute an Empress Query Language command in the UNIX/Linux environment. The Batch Interface allows a batch command file to execute an Empress Query Language command in the Windows environment.

The Standard Interface

The Standard Interface allows a C program to execute a Query Language command and access data from Empress databases or the operating system data file which is in Empress recognizable DUMP format.

The SQL Precompiler

The SQL Precompiler allows a C program to execute Query Language statements (static and dynamic embedded SQL statements) and process the data record by record.The Language Interface allows SQL commands to be issued from the operating system, or within a program.

                       
                             
                         

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