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DB2 Application Programming

Course content updated by LearnQuest
Price
3,500 USD
5 Days
DBDB-510
Classroom Training, Online Training
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Course Description

Overview

This DB2 Application Programming course begins with an overview of relational database concepts including referential integrity, continues with the essentials of the Structured Query Language (SQL), and finally shows how SQL statements are embedded in applications. Attention is paid to coding efficient SQL for best performance, and the SQL statement EXPLAIN PLAN is used to help to evaluate the efficiency of SQL statements.
The course provides several guided, hands-on, practice sessions give each student many opportunities to use SQL to access data. As the course progresses, students will spend the majority of each day in workshop, with minimal lectures to introduce new topics and then immediately apply them hands-on. When finished, each student will have a good grasp of the essentials of SQL and the DB2 environment.
 

Objectives

Upon completion of the CICS TS: Fundamentals course, students will be able to:
  • Learn to code accurate SQL statements in both standalone and embedded environments
  • Understand and explain DB2 concepts, terminology and components
  • Discuss the design considerations of REFERENTIAL INTEGRITY, including the use of Primary Key (PK), Unique Key (UK) and Foreign Keys (FK)
  • 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 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 GRANT and REVOKE
  • 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

IT personnel who need to use SQL to design and develop programs to retrieve and change data from DB2 tables.
 

Prerequisites

    Students must have a basic understanding of the computing environment and skills with an integrated development environment (e.g. TSO/ISPF on an IBM mainframe) with at least three months experience with COBOL.
     

Topics

Dataset Management Systems (DBMS) Overview
  • Relational Database Concepts
  • The Relational Model
  • Domains
  • Integrity and Relationships
Basic Structured Query Language (SQL)
  • Basic Datatypes
  • NULL
  • Basic Data Manipulation using Select Statements
  • Basic Predicates
DB2 Interactive (DB2I)
  • Executing Queries
Functions
  • Column Functions
  • Scalar Functions
  • Special Registers
Intermediate Data Manipulation
  • Order By
  • Group By
  • Having
  • Compound Conditions
  • LIKE
  • IN
  • BETWEEN
  • Using DISTINCT
  • ORDER BY Clause
Joins
  • Old & New syntax
  • INNER
  • LEFT, RIGHT, FULL
  • Order By
Subselects
  • Basic
  • IN
  • Correlated
  • UNION / ALL
Data Definition
  • Create
  • Alter
  • Drop
Altering Data
  • INSERT
  • UPDATE
  • DELETE
  • RI
  • COMMIT
  • ROLLBACK
Additional SQL
  • RI
  • NTE
  • Other Functions
  • Table Based Partitioning
  • Native Stored Procedures
Application Development Process
  • Program Structure
  • SQL CODES
  • Program Preparation
  • DCLGEN
  • Declare
  • Fetch
  • Composite Example
  • SELECT INTO vs FETCH INTO
Concurrency Control
  • Locking
  • Types of Locks
Application Altering Data
  • INSERT
  • UPDATE
  • DELETE
  • Cursor Controlled Changes
  • Application RI
Additional Application Considerations (Appendix)
  • CURSOR WITH HOLD
  • Indicator Variables
  • Packages and Plans
  • Dynamic SQL
  • Program Preparation
  • “Infamous” -818 SQLCODE problem
  • Scrollable Cursors
Performance Overview
  • Performance Overview
  • Optimizer
  • Data access (TB,MIS,NMIS)
  • Predicate Processing
  • Explain Plan
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