DB2 for z/OS Application Programming Course

First, the concepts of DB2 are presented and discussed.  The Structured Query Language (SQL) is presented as the means to access DB2 data (and to create and secure DB2 components).  Several guided, hands-on, practice sessions give each attendee an opportunity to use SQL to access data.  QMF and/or SPUFI are used to execute SQL statements.  Referential Integrity concepts and implementation are covered.

DB2 (SQL) programming / embedding SQL in a COBOL application program is presented and discussed in detail.  A "shell" program is modified to SELECT a single row, FETCH multiple rows, INSERT, UPDATE, and DELETE row(s), use Referential Integrity, and use column functions and grouping.

DB2 performance guidelines are discussed.  The SQL statement EXPLAIN PLAN is used to help to evaluate the efficiency of SQL statements.

The following “Release Dependent” features can be covered as needed:
Version 8 – Table-Controlled Partitioning, Common Table Expression, Dynamic Scrollable Cursors, multi-row FETCH and INSERT, GET DIAGNOSTICS, Recursive SQL, Sequence Objects, Scalar Full Select, Select Statement In An Insert statement, Delimited LOAD / UNLOAD, MQT’s

Version 9 – PureXML, New Data Types - bigger BINARY, VARBINARY, BIGINT, DECFLOAT, INSTEAD OF triggers, INTERSECT and EXCEPT, TRUNCATE Statement, MERGE Statement, Native SQL Stored Procedures, Optimistic Concurrency Control, Automatic Object Creation, Skip Locked Data, REOPT (AUTO)

Upon completion of this course, the participant will be able to:

> Explain DB2 concepts, terminology and components
> Discuss the Primary Key (PK), Unique Key (UK) and Foreign Key (FK) concept
> SELECT rows of data from DB2 tables
> Use QMF and/or SPUFI to "run" SQL statements
> Use the WHERE clause to SELECT specific rows of a DB2 table
> Build queries using the ORDER BY, GROUP BY, HAVING clauses
> Use the CASE expressions and several SCALAR / COLUMN FUNCTIONS
> Access multiple tables - JOIN, UNION, sub-queries, and nested table expressions
> CREATE Tables, Indexes, Views
> "Change" tables using the INSERT, UPDATE, DELETE statements
> Describe the security provided by the GRANT and REVOKE
> Discuss the design considerations of REFERENTIAL INTEGRITY
> Perform DCLGENs to build table definitions and I/O areas
> Modify a "shell" program to select a single row, multiple rows, and change rows
> Discuss the importance of the SQLCODE and how to test for it
> Discuss overall DB2 PERFORMANCE considerations
> Run the EXPLAIN PLAN or VISUAL EXPLAIN and analyze results

DB2 Application Programming
SQL Programming I - Overview
SQL Programming II - Data and Procedure Division Changes
Hands-on Lab - SELECT a single row into a program
SQL Programming III - SELECTing Multiple Rows
Hands-on Lab - SELECT more than one row - the CURSOR
DB2 Application Programming (Continued)
Concurrency Control - Locking
SQL Programming IV - INSERT, UPDATE, DELETE
Hands-on Lab - updating and Referential Integrity
DB2 Application Programming (Continued)
Hands-on Lab - Updating and Referential Integrity
Additional Topics
SQL Programming V - Other Programming Considerations
DB2 Performance Introduction - EXPLAIN PLAN or VISUAL EXPLAIN
   Hands-on Lab - Analyze SQL statements
Data Control Language (DCL)

Appendices
Appendix A - IBM Sample Tables
Appendix B – Bibliography
Appendix C - The Programming Workshop
Appendix D – Plan_Table & Dsn_Statemnt_Table
Appendix E - Hints to Success
Appendix F – SQLCODES / SQLSTATES
Appendix G – QMF Overview
Appendix H – Stored Procedures
Appendix I – DB2 for WINDOWs Overview
Appendix J – Additional Features - UDT / UDF, Trigger, Casting
Appendix K – Group By Extensions
Appendix L – Visual Explain Overview
Appendix M – Functions
Appendix Z8– Changes Summary - DB2 V 8
Appendix Z9 - Changes Summary - DB2 V 9
Appendix Z9 - AppV9B - DB2 V9 Summary from IDUG Solution Journal