Table structure changes when using 'create table X as ( select * from X@remote_server )'

I need to create and copy data from a remote Oracle server to a local server. The command I use is
create table X as ( select * from X@remote_server )
with remote_server is the tns name of the remote Oracle server.
The local table is created and populated with data as expected but when I check the structure using 'desc X' it shows me all the CHAR fields of the local table are triple as large as of the remote table.
I guess the problem is the difference between the NLS_CHARACTERSET settings . The local charset is AL32UTF8 and the remote is WE8MSWIN1252.
How do I change the command to make the two tables have the same field sizes ?
Thanks,
Vu

Do you want to be able to store all the data from the remote table in the local table? Assuming you do, increasing the size of the column would be the correct behavior.
By default, a VARCHAR2(10) allocates up to 10 bytes of storage. In the Windows-1252 character set on the source, 1 character requires 1 byte of storage. So a VARCHAR2(10) has space for up to 10 characters. In the UTF-8 character set on the destination, however, 1 character can require up to 3 bytes of storage. So a VARCHAR2(10) may allow you to store as few as 3 characters. Since Oracle has no way of knowing what data you have (and will have) in the source system, it triples the size to ensure that all the data from the remote system will fit in the new table. If you want the columns to be the same size on the destination that they are on the source, it is highly probable that you'll get errors inserting the data because at least one value will be too large for the destination column.
Justin

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