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DB2 9 Application Development exam 733 prep, Part 4: Embedded SQL programming

Build applications that interact with DB2

Roger E. Sanders (rsanders@netapp.com), Senior Manager - IBM Alliance Engineering, Network Appliance, Inc.

Roger E. Sanders is a Senior Manager - IBM Alliance Engineering at Network Appliance, Inc. He has been designing and developing databases and database applications for more than 20 years and has been working with DB2 Universal Database since it was first introduced with OS/2 1.3 Extended Edition. He has written articles for IDUG Solutions Journal, Certification Magazine, and developerWorks, presented and taught classes at IDUG and RUG conferences, participated in the development of the DB2 certification exams, writes a regular column for DB2 Magazine and is the author of 9 books on DB2 UDB.
(An IBM developerWorks Contributing Author)

Summary: This tutorial introduces you to embedded SQL programming and walks you through how to construct an embedded SQL application. This tutorial introduces the process for converting one or more high-level programming language source code files containing embedded SQL into an executable application. This is the fourth in a series of nine tutorials designed to help you prepare for the DB2 Application Developer Certification exam (Exam 733).

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Date: 15 Feb 2007
Level: Introductory
PDF: A4 and Letter (131 KB | 40 pages)Get Adobe® Reader®

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Before you start

About this tutorial

This tutorial introduces you to embedded SQL programming and walks you through the basic steps of constructing an embedded SQL application. This tutorial also provides you an introduction to converting one or more high-level programming language source code files containing embedded SQL into an executable application. In this tutorial, you will learn:

How SQL statements are embedded in a high-level programming language source code file
The steps involved in developing an embedded SQL application
What host variables are, how they are created, and how they are used
What indicator variables are, how they are created, and when they are used
How to analyze the contents of an SQLCA data structure variable
How to establish a database connection from an embedded SQL application
How to capture and process errors when they occur
How to convert source code files containing embedded SQL into an executable application

This is the fourth in a series of nine tutorials designed to help you prepare for the DB2 Application Developer Certification exam (Exam 733). The material in this tutorial covers the objectives in Section 4 of the exam, entitled "Embedded SQL programming." You can view these objectives at http://www.ibm.com/certify/tests/obj733.shtml.

You do not need a copy of DB2 Universal Database to complete this tutorial. However, you can download a free trial version of IBM DB2 Universal Database Enterprise Edition, and a free copy of DB2 Express-C 9 from the DB2 Express-C downloads page.

Objectives

After completing this tutorial, you should be able to:

Establish a database connection within an embedded SQL application
Execute SQL statements within an embedded SQL application
Analyze results and handle common errors encountered when SQL statements are executed in an embedded SQL application

Prerequisites

To understand some of the material presented in this tutorial, you should be familiar with the following terms:

Object: Anything in a database that can be created or manipulated with SQL (for example tables, views, indexes, and packages).
Table: A logical structure used to present data as a collection of unordered rows with a fixed number of columns. Each column contains a set of values, each value of the same data type (or a subtype of the column's data type); the definitions of the columns make up the table structure, and the rows contain the actual table data.
DB2 optimizer: A component of the SQL precompiler that chooses an access plan for a Data Manipulation Language (DML) SQL statement by modeling the execution cost of several alternative access plans and choosing the one with the lowest estimated cost.

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