方案是指schema吧。
每一个用户都有一个对应的schema，且他们的名字相同。
Schemas and Schema ObjectsA schema is a collection of database objects. A schema is owned by a database user and has the same name as that user. Schema objects are the logical structures that directly refer to the database's data. Schema objects include structures like tables, views, and indexes. (There is no relationship between a tablespace and a schema. Objects in the same schema can be in different tablespaces, and a tablespace can hold objects from different schemas.)本想自己答，结果一看文档，还是人家说的好，这是oracle文档，concepts中的内容
每一个用户都有一个对应的schema，且他们的名字相同。
Schemas and Schema ObjectsA schema is a collection of database objects. A schema is owned by a database user and has the same name as that user. Schema objects are the logical structures that directly refer to the database's data. Schema objects include structures like tables, views, and indexes. (There is no relationship between a tablespace and a schema. Objects in the same schema can be in different tablespaces, and a tablespace can hold objects from different schemas.)本想自己答，结果一看文档，还是人家说的好，这是oracle文档，concepts中的内容
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