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've never worked enough with IAM to understand how buffers are handled with it. the traditional VSAM and sequential file defaults sometimes enable for giant enhancements in EXCP counts and run times by adding buffers, however IAM might not -- you'll have to see the manual. and can use for help

Static binding is where the linker copies the referred to as operate into the program's executable image from the suitable library and resolves the references to the operate at compile/link time. The program contains a duplicate of the library operate and doesn't got to load it at run time. Dynamic ...

Declare a variable in your cobol program like that
01 ws-x-amount pic 9(7)v99 comp-3.
and
move your vsam file field data to the above field
and then set the above mention field into the db2 table. It will be
work.