DB2 FOR Z/OS, SQL and 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 are also covered –
> Version 7 - UNION Everywhere, Scrollable cursors, Limited Fetch
> 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
Also, a demonstration is provided of DB2 for WINDOWS to show "future" features for DB2 for z/OS. These include GROUPING SETS, ROLLUP, and Visual Explain.

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, 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

DAY 1
 I. Introduction to DB2
     Course Introduction
 1. DB2 - Concepts, and Terminology
II. Structured Query Language (SQL)
 2. SQL 1 - The SELECT Statement
Hands-on Lab - SELECT
 3. Database 2 Interactive
 4. SQL 2 – SQL Functions
Hands-on Lab - SELECT / Special Features
 5. SQL 3 - ORDER BY, GROUP BY, HAVING
Hands-on Lab - ORDER BY, GROUP BY, HAVING
DAY 2
II. Structured Query Language (SQL) (Continued)
 6. SQL 4 - Join, Sub-select, UNION
Hands-on Lab - Join, Sub-select, UNION
 7. SQL 5 - Data Definition Language
 8. SQL 6 - INSERT, UPDATE, DELETE
Hands-on Lab - Creating DB2 Components & - Insert, Update, Delete
 9. SQL 8 – Other SQL Topics
DAY 3
III. DB2 Application Programming
10. SQL Programming I - Overview
11. SQL Programming II - Data and Procedure Division Changes
Hands-on Lab - SELECT a single row into a program
12. SQL Programming III - SELECTing Multiple Rows
Hands-on Lab - SELECT more than one row - the CURSOR