Data Structure
Introduction Data structures are a powerful tool that can make your CL programs more...
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ILE with CL using Procedures
Introduction In CLLE, subroutines and procedures are essential programming constructs used to organize and...
OVRDBF and OPNQRYF
Introduction In IBM i CL (Control Language) programming, the “override” concept is used in...
Error & Message Handling
Error and message handling in CL (Control Language) programming on IBM i is crucial...
File Operations
CL, unlike RPG where all types of files are supported, does not support all...
Operations and Functions
Built In Functions Introduction: Built-in function is a function that is already available in...
Data Definition Language
Data definition language (DDL) is described in the form of SQL which creates, alters,...
Field Reference Files
In AS400, Field Reference file or simply a Reference file is nothing but a...
Physical and Logical Files
Introduction In AS400, a physical file is a fundamental database object used for storing...