Top "Mainframe" questions

How to abend job intentionally

Is it possible to abend your job intentionally through COBOL program. suppose I have an Input file having Header,Detail …

cobol mainframe jcl

How do I select distinct count over multiple columns?

How to select distinct count over multiple columns? SELECT COUNT(DISTINCT col1, col2, col3) FROM table; Is there a working …

db2 mainframe

append records to an existing file

If I want to append records to an existing file what DISP parameters do I need to use?

cobol dataset mainframe jcl

How to use the C socket API in C++ on z/OS

I'm having issues getting the C sockets API to work properly in C++ on z/OS. Although I am including …

c++ c sockets mainframe zos

How to unpack COMP-3 digits using Java?

I have huge mainframe file and there are some packed digits in that file. I would like to know how …

ascii mainframe ebcdic packed-decimal

How can z/OS call a web service?

I have a COBOL program that needs to get data from a web service. Without using CICS what are my …

web-services cobol mainframe zos

VSAM Status code 04

I am running one COBOL pgm which is reading one VSAM file. Below is ithe input output section in my …

cobol mainframe jcl

Teaching myself Z/OS assembler

I’ve interned at a company that does a lot of mainframe work. Most of my mainframe experience has been …

assembly mainframe zos

Downloading text files with Python and ftplib.FTP from z/os

I'm trying to automate downloading of some text files from a z/os PDS, using Python and ftplib. Since the …

python ftp mainframe zos

How do you get average of sums in SQL (multi-level aggregation)?

I have a simplified table xx as follows: rdate date rtime time rid integer rsub integer rval integer primary key …

sql db2 mainframe aggregation multi-level