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what is the difference between primary key and unique key?
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Answer Posted / swi
1.IN ABAP Primary key is having null values where as in
unique key having no null values
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SAS question: I have 50 fils a1,a2,...,a50. the primary key is upc. then if i want to merge all 50 files, the code is as follows, data test; merge a1 ... a50; by upc; run; we know that writing all 50 files name is time consuming, is there any standard format of this code?
THERE ARE 4 SOURCE FILES WHICH CONTAINS SAME METADATA CREATE A TARGET THAT SHOULD DISPLAY THE FILE NAME ALONG WITH THE RECORD PLEASE SEND THE ANSWERFOR THIS QUESTION WITH MAPPING
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