Nickname - the nickname is a localalias for the remote table in the source database.
别名-别名是源数据库中的远程表的本地别名。
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In other words, if you do not mind giving the alias PPMT_DB on the target server for the source PPMT_DB database, then you do not need to create a localalias on the source server.
Queues should not have the word QUEUE in their name (since it's implied), nor should they have the topology in the name (local, remote, alias, and so on).