marge tow files based on keys

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# 1  
marge tow files based on keys

how can i marge two files depend som key
for example:
the first file include many records of information for X person
and the second file have one record of information for each X person

shortly i want to mak first :match between the two files then insert data from the second to the first one
# 2  
did you try using the command join????
# 3  
thanks ahmed for your replay
the problem that i need to insert missing data for some persons so i cont make sort for the data because the first file (data files) not organise in columns (data row) but the second yes
so first i think that i have ro make search then insert

thak in advance
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