DB2 for z/OS, SQL and Application Programming

Overview

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 are also covered -

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)

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 - 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 or VISUAL EXPLAIN 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

5 days

Course outline

DAY 1

Introduction to DB2

Course Introduction

DB2 - Concepts, and Terminology

Structured Query Language (SQL)

SQL 1 - The SELECT Statement
Hands-on Lab - SELECT
Database 2 Interactive
SQL 2 - SQL Functions
Hands-on Lab - SELECT / Special Features
SQL 3 - ORDER BY, GROUP BY, HAVING
Hands-on Lab - ORDER BY, GROUP BY, HAVING

DAY 2

Structured Query Language (SQL)(Continued)

SQL 4 - Join, Sub-select, UNION
Hands-on Lab - Join, Sub-select, UNION
SQL 5 - Data Definition Language
SQL 6 - INSERT, UPDATE, DELETE
Hands-on Lab - Creating DB2 Components - INSERT, UPDATE, DELETE
SQL 8 - Other SQL Topics

DAY 3

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

DAY 4

DB2 Application Programming (Continued)

Concurrency Control - Locking
SQL Programming IV - INSERT, UPDATE, DELETE
Hands-on Lab - updating and Referential Integrity

DAY 5

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

Appendices

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