DB2 for OS/390 and z/OS Application Programming

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 concepts are 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.

Version 6 - 100 new scalar functions, update Triggers, User Defined Functions (UDF), User Defined Types (UDT)

Version 7 - UNION Everywhere, Scrollable cursors, Limited Fetch

Version 8 - additional SQL features

Also, a demonstration is provide of DB2 for WINDOWs to show "future" features for DB2 for OS/390. These features include Recursive SQL, the WITH SQL feature, GROUPING SETS, ROLLUP and Visual Explain.

LEARNING OBJECTIVES

As a result of this class, the attendee 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 using JOIN, UNION, sub-queries, 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 SQL statement and analyze results

Audience

Experienced Data Processing personnel who need use SQL to design and develop programs to access DB2 data.

Prerequisites

At least six months of TSO/ISPF and COBOL programming experience is recommended. No previous database experience is needed.

Course duration

3 days

Course outline

DAY 1

DB2 Application Programming

10. SQL Programming I - Overview
11. SQL Programming II - Data and Procedure Division Changes
12. SQL Programming III - SELECTing Multiple Rows

DAY 2

DB2 Application Programming (Continued)

13. Concurrency Control - Locking
14. SQL Programming IV - INSERT, UPDATE, DELETE

DAY 3

DB2 Application Programming (Continued)

Additional Topics

15. SQL Programming V - Other Programming Considerations
16. DB2 Performance Introduction
17. Data Control Language (DCL)

Appendices

Appendix A - IBM Sample Tables Appendix J - Version 6 Functions Summary

Appendix B - Bibliography Appendix K - UDT / UDF

Appendix C - The Programming Workshop Appendix L - Cast Testing

Appendix D - EXPLAIN PLAN Statement and PLAN_TABLE and DSN_STATEMNT_TABLE Appendix M - Trigger Introduction

Appendix E - Hints to Success Appendix N - DB2 for WINDOWs Overview

Appendix F - SQLCODES / SQLSTATES Appendix Z6- Changes Summary - DB2 V 6

Appendix G - QMF Overview Appendix Z7- Changes Summary - DB2 V 7

Appendix H - Stored Procedures Appendix Z8- Changes Summary - DB2 V 8

Appendix I - "Common" SQL Errors

Contact Information
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