Setting up logical files

 

A logical file contains no data, but it defines record formats for one or more physical files. You can create various logical files and describe their record formats and access paths using data description specifications (DDS).

Many of the rules for setting up logical files apply to all categories of logical files. In these topics, rules that apply only to one category of logical file identify which category they refer to. Rules that apply to all categories of logical files do not identify the specific categories they apply to.

• Creating a logical file
  You can create a logical file using data description specifications (DDS).

• Describing logical file record formats
  For every logical file record format described with data description specifications (DDS), specify a record format name and either the PFILE keyword (for simple- and multiple-format logical files) or the JFILE keyword (for join logical files).

• Describing access paths for logical files
  You can specify the access path for a logical file in several ways.

• Setting up a join logical file
  These examples show how to create a variety of join logical files.

 

Parent topic:

Setting up database files