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Answer Posted / guest
Datasets are concatenated by writing a normal DD statement
for the first dataset and then adding a DD statement without
a DDNAME for each dataset to be concatenated in the order
they are to be read. The following is an example of three
datasets concatenated:
//YEARDAT DD DSN=JAN.DATA,DISP=SHR
// DD DSN=FEB.DATA,DISP=SHR
// DD DSN=MAR.DATA,DISP=SHR
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