参照其他用户的SQL语言基础表

参考其它用户的表 * 其它用户的表并不在本用户的模式（模式）之中 要使用，则必须在其它表名前面加上前缀. * Referencing Another User’s Tables A schema is a collection of objects. Schema objects are the logical structures that directly refer to the data in a database. Schema objects include tables, views, synonyms, sequences, stored procedures, indexes, clusters, and database links. If a table does not belong to the user, the owner’s name must be prefixed to the table.