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How to concatenate N Prefix to a parameter in sqlserver

Posted By:      Posted Date: September 24, 2010    Points: 0   Category :Sql Server
How we can concatenate N-Prefix to sqlparameter,i am trying to insert japanese characters into the DB.if i tried like below it's working.

1.  insert into japanese (a,b) values (1,N'C?????');

above is working fine.
if i tried to execute the same by appending to the parameter,it's not working

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