SQL Queries you can run and test in your project to update or modify existing rows in a Table.
DevOps is an integration process between development and operations team. Explained the real roles of DevOps developers in a way a novice can understand quickly.
RPG being used extensively in AS/400 environment. The language is different from other languages such as JAVA or COBOL. You can learn unique features here.
COBOL multi dimensional arrays how to use in your program
Linux file system is little tricky and you can learn quickly by learning these tips.
Performance tuning in DB2 is in the hands of developers. These tips really you need to improve it.