Oracle OCP 19c 认证1Z0-082考试题库(第17题)
Oracle OCP 19c 认证1Z0-082考试题库(第17题)-CUUG内部学员版082题库解析17. Examine the following command:CREATE TABLE (prod_id number(4),Prod_name varchar2 (20),Category_id number(30),Quantity_on_hand number (3) INVISIBLE);Which three statements are true about using an invisible column in t he PRODUCTS table?A. The %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column in the output.B. The DESCRIBE commands in SQL *Plus will not display the invisible column in t he output.C. Referential integrity constraint cannot be set on t he invisible column.D. The invisible column cannot be made visible and can only be marked as unused.E. A primary key constraint can be added on t he invisible column.
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