文件名称：参考其它用户的表-SQL语言基础
文件大小：5.26MB
文件格式：PPT
更新时间：2024-05-15 13:25:07
SQL 基础
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.