Introduction to JCL
Initially, when the computers were new to the world, the size of the computers was huge and very clumsy to use. Also, initially there were no display terminals. So, there […]Read more
Delete content of sequential dataset on mainframe.
Delete content of sequential dataset on mainframe While working with mainframes there will be times when you’d like to delete all the records from a file but want to keep […]Read more
NULL in DB2 and COBOL.
NULL In DB2 and COBOL SQL, unlike COBOL, supports variables that can contain null (values – the use of word “value” along with NULL is not usually encouraged as NULL […]Read more
Difference between DFSORT and SyncSort.
Difference between DFSORT and SyncSort. As a mainframe programmer even if one is not in to too much of data manipulation, one will end up using the SORT product […]Read more
Is it DFSORT or SyncSort?
Is it DFSORT or SyncSort? DFSORT is a sort product sold by IBM. SYNCSORT is a competing product sold by Syncsort, Inc. CA-SORT is yet another sort product, sold by […]Read more
Find the list of programs using a DB2 table.
Find the list of programs using a DB2 table. If the question of nature, how can I find the list of programs using a DB2 table? Then this article might […]Read more
JCL – Job Control Language.
JCL – Job Control Language. Job Control Language (JCL) is a scripting language used on IBM mainframe operating systems. JCL is a set of statements that you code to […]Read more
ISAM- Indexed Sequential Access Method.
ISAM (pronounced “eye sam”) stands for Indexed Sequential Access Method. It is a technique for storing and accessing data in a file on secondary storage, for example a disk. ISAM […]Read more
OAM – Object Access Method
The Object Access Method (OAM) help to access files in the operating system (OS) via certain command line codes. Unlike other access methods that are made for generic systems, the […]Read more
BPAM – Basic Partitioned Access Method.
In IBM mainframe operating systems, basic partitioned access method (BPAM) is an access method for libraries with a specific structure, called partitioned datasets (PDSes). BPAM is used in OS/360, OS/VS2, […]Read more
QSAM – Queued Sequential Access Method.
QSAM stands for Queued Sequential Access Method. This is an extended version of the basic sequential access method (BSAM). When this method is used, a queue is formed of input […]Read more
BSAM – Basic Sequential Access Method.
BSAM is Basic Sequential Access Method. This is an access method for storing or retrieving data blocks in a continuous sequence, using either a sequential access or a direct access […]Read more