子模式DDL用来描述（）A、数据库的总体逻辑结构B、数据库的局部逻辑结构C、数据库的物理存储结构D、数据库的概念结构
子模式DDL用来描述（）
- A、数据库的总体逻辑结构
- B、数据库的局部逻辑结构
- C、数据库的物理存储结构
- D、数据库的概念结构
相关考题：
Examine the following command;ALTER SYSTEM SET enable_ddl_logging = TRUE;Which statement is true?() A. Only the data definition language (DDL) commands that resulted in errors are logged in the alert log file.B. All DDL commands are logged in the alert log file.C. All DDL commands are logged in a different log file that contains DDL statements and their execution dates.D. Only DDL commands that resulted in the creation of new segments are logged.E. All DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic Repository (ADR) home.
单选题Examine the following command; ALTER SYSTEM SET enable_ddl_logging = TRUE; Which statement is true?（）AOnly the data definition language (DDL) commands that resulted in errors are logged in the alert log file.BAll DDL commands are logged in the alert log file.CAll DDL commands are logged in a different log file that contains DDL statements and their execution dates.DOnly DDL commands that resulted in the creation of new segments are logged.EAll DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic Repository (ADR) home.
单选题Examine the following command:ALTER SYSTEM SET enable_ddl_logging=FALSE;Which statement is true?（）ANone of the data definition language (DDL) statements are logged in the trace file.BOnly DDL commands that resulted in errors are logged in the alert log file.CA new log.xml file that contains the DDL statements is created, and the DDL command details are removed from the alert log file.DOnly DDL commands that resulted in the creation of new database files are logged.