---
title: "COBOL 66 Level Useful Example"
description: "Recently in an interview asked a question about Level 66. This is a simple question but rarely used in real-time. So, 66 Level will be used to rename a group of elements. Let me show an example, A lev..."
url: https://srinimf.com/2015/03/13/66-level-in-cobol-advantage/
date: 2015-03-13
modified: 2026-10-10
author: "Srini"
image: https://i0.wp.com/srinimf.com/wp-content/uploads/2021/09/pexels-photo-7550823-1.jpeg?fit=867%2C1300&ssl=1
categories: ["COBOL", "Mainframe DB2"]
tags: ["66 Level in COBOL", "COBOL Tips and Tricks"]
type: post
lang: en
---

# COBOL 66 Level Useful Example

Recently in an interview asked a question about Level 66. This is a simple question but rarely used in real-time.

---

So, [66 Level](https://srinimf.com/2016/07/14/cobol-66-level-new-information-must-read/) will be used to rename a group of elements. Let me show an example,

A level-number of 66 is used to declare a re-grouping of previously defined items, irrespective of how those items are structured.

```
01  customer-record.
           05  cust-key            PIC X(10).
           05  cust-name.
               10  cust-first-name PIC X(30).
               10  cust-last-name  PIC X(30).
           05  cust-dob            PIC 9(8).
           05  cust-balance        PIC 9(7)V99.
 
       66  cust-personal-details   RENAMES cust-name THRU cust-dob.
       66  cust-all-details        RENAMES cust-name THRU cust-balance.
```

The “cust-personal-details” is a new group name to the customer-record. So the new group name will NOT take additional space, it uses the original group namespace.

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- [How to Use COBOL 66 Level Field](https://srinimf.com/2016/07/14/cobol-66-level-new-information-must-read/)DateJuly 14, 2016
- [COBOL 66 Level and Redefines The Real Benefits](https://srinimf.com/2015/10/02/top-differences-of-cobol-66-level-and-redefines-clause/)DateOctober 2, 2015
- [USAGE Clause in COBOL Why do We need](https://srinimf.com/2017/02/23/how-to-code-usage-clause-in-cobol-example/)DateFebruary 23, 2017

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