Which statement is true about database links?
A.A database link created in a database allows a connection from that database's instance to the正确答案E
Target database's instance, but not vice versa B.Private database link creation requires the same user to exist in both the local and the remote
Databases C.A public database link can be used by a user connected to the local database instance to connect
To any schema in the remote database instance D.A public database link can be created only by sys E.A database link can be created only between two Oracle databases
