Using SQL Statements

A*****************************************************************

A* DESCRIPTION: This

is the

DDS

for the physical file EMPMST.

*

A*

It

contains

one

record

format

called EMPREC.

*

A*

This

file contains one

record

for each employee *

A*

of

the company.

 

 

 

*

A*****************************************************************

A*

AR EMPREC

A

ENUM

5

0

TEXT('EMPLOYEE NUMBER')

A

ENAME

20

 

TEXT('EMPLOYEE NAME')

A

ETYPE

1

 

TEXT('EMPLOYEE TYPE')

A

EDEPT

3

0

TEXT('EMPLOYEE

DEPARTMENT')

A

ENHRS

3

1

TEXT('EMPLOYEE

NORMAL WEEK HOURS')

AK ENUM

Figure 29. DDS for EMPRPT

To create a program from this source use the CRTBNDRPG command, speci DFTACTGRP(*NO).

Using SQL Statements

The

DB2

UDB

for AS/400database can

be

accessed from

an

ILE RPG pro

by

embedding

SQL statements into your program source. Use the follow

enter your SQL

statements:

 

 

 

 

 

¹

Enter

your

SQL

statements

on the

Calculation specification

 

¹

Start

your

SQL

statements

using the

delimiter /EXEC SQL

in

positions 7-

 

(with

the

/

in position

7)

 

 

 

 

¹You can start entering your SQL statements on the same line as the delimiter

¹

Use

the

continuation line

delimiter

(a

+

in

position 7)

to

continue

 

ments

on

any subsequent

lines

 

 

 

 

 

 

 

¹

Use

the

ending

delimiter

/END-EXEC in

positions

7-15

(with

the

slash

 

tion

7) to signal the end of your SQL statements.

 

 

 

Note: SQL

statements

cannot

go

past position

80

in

your

program.

 

Figure 30 on page 56 shows an example of embedded SQL statements.

Chapter 5. Entering Source Statements55

Page 79
Image 79
IBM AS/400 manual Using SQL Statements, DB2 UDB, Statements Calculation specification Start Your

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.