Mainframe - COBOL DB2 - Basic to Advance Level

Create three program components for the cobol db2 application and set up load libraries. Define the brm as the compiled cobol version and include 80-byte blocks and copy books.

Learn to create an employee table in SPUFI, defining employee_id, employee_name, date, salary, and department, with a primary key and unique index, then execute and verify results.

Explore host variables by mapping database fields to COBOL equal in variables, matching field lengths and data types such as integer, decimal, character, date, time, and timestamp.

Learn to write a COBOL DB2 program that counts total records in a table, defines a host variable with picture 9(4) comp, binds, compiles, and runs to display the result.

Explore the cursor life cycle in mainframe COBOL DB2, from declaration to opening, fetching into a buffer, and closing, enabling retrieval of multiple rows for display.

Demonstrate inserting employee records with insert into, specifying id, first name, last name, birth date, salary, and department, while fixing apostrophe and date format issues; verify table and index.

Master selecting data with a where clause to filter employees by condition and retrieve specific fields such as employee id, name, date of birth, and salary.

Explore referential integrity in a department and employee setup. Learn how inserts fail with missing references and how on delete cascade, set, or restrict works.

Explore how the left outer join returns all records from the left table and brings in the matching records from the right.

Create and use views in db2 to restrict access to sensitive employee data, transforming a master employee table into department-specific virtual tables.

Explore bind parameters such as cs, rr, and ur, and how isolation levels, plan binding, and validation timing govern concurrency and cobol program management.