7CHAPTER 2 ADABAS Essentials Introduction 7 ADABAS DBMS 8 ADABAS Databases 8 ADABAS Files 9 ADABAS File Number 9 Level Number. ADABAS Essentials. Introduction 7. ADABAS DBMS 8. ADABAS Databases. 8. ADABAS Files 9. ADABAS File Number 9. Level Number 9. Data Field Names 9. SAS/ACCESS Interface to ADABAS Software. ADABAS Essentials. [continuerule]. Introduction · ADABAS DBMS · ADABAS Databases · ADABAS Data Fields.

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Get updates Get updates. A data edsentials level number is a one- or two-digit number, from 01 to 07, used in conjunction with data field grouping. Data fields with a level of 2 or greater are considered to be a part of the immediately preceding group, which has a lower level number.

For example, AA and B4 are valid data field names.

Mainframe programming — NATURAL/ADABAS tutorial. Intro — a few words of introduction

You can find all the parts of this tutorial in the links below: Currently, the largest manufacturer of mainframe is IBM, but we should keep in mind that this is not the only provider of this type of technology. Previous Page Next Page. Soon we will also start writing the first programs and create our own databases. An ISN is the logical identifier for each record. Sign in Get started.

Systems based on Mainframes are still widely used, mainly by large organizations. Data Storage, Associator, and Work Storage.


When I was preparing to start my job as a junior mainframe developer, I encountered the problem of a small amount of knowledge sources in this area, particularly available for free online. Programming on the Mainframe class computers is not a popular profession nowadays, it can be however adxbas interesting one and also very profitable.

It was usually large, like most computers then, and it occupied a large part of the server rooms. In this first post I will give you some information about the mainframe computer as well as the language and database that we will use. If you see any errors in my articles, please let me know!

The companies commonly use Mainframe for critical financial applications or for public use complex systems. In the next part of the tutorial we will learn about the syntax of the language and write our first program.

The first character must be alphabetic, and the second character can be either alphabetic or numeric. ewsentials

ADABAS Essentials: ADABAS Databases

The Work Storage system file contains temporary work files. The following output illustrates four data fields and seven logical records from an ADABAS file containing data about customers.

Also the language is extremely easy to learn and use.

Never miss a story from codeburstwhen you sign up for Medium. The name Mainframe refers to the first machines of this type.

To avoid confusion, keep in mind the two usages of the term descriptor throughout this document: Each database can consist of up to 5, logical files, depending on the device type. Unfortunately, young programmers are more likely to use languages such as Java, Python, JavaScript etc.


Each database has an associated database identifierwhich is a numerical value in the range 1 to 65, and a database namewhich is a character value with a maximum of 16 characters. The Associator system file contains internal storage information that manages the data for the entire database.

As you can guess, to program Adwbas machines we usually use languages specially adapted for this.

The latter is the language that I use at work and the one that I use writing this tutorial. The data fields are the vertical columns of data. If you like the article and you believe there should be more articles about Mainframes please clap a bitleave a comment or share this link wherever you want. This is why I decided to start this tutorial for anyone who would like to know more about this interesting area of computer science, and also learn a little of NATURAL language, which is one of the programming languages used for Mainframe computers.

Of course there are also downsides.

You can find all the parts of this tutorial in the links below:. Programming languages on the mainframe As you essentiale guess, to program Mainframe machines we usually use languages specially adapted for this.