单项选择题

What does the FORCE option for creating a view do? （）

A. creates a view with constraints
B. creates a view even if the underlying parent table has constraints
C. creates a view in another schema even if you don't have privileges
D. creates a view regardless of whether or not the base tables exist

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单项选择题

Which are iSQL*Plus commands? （）

A. INSERT
B. UPDATE
C. SELECT
D. DESCRIBE
E. DELETE
F. RENAME

单项选择题

The CUSTOMERS table has these columns:
CUSTOMER_ID NUMBER(4) NOT NULL
CUSTOMER_NAME VARCHAR2(100) NOT NULL
STREET_ADDRESS VARCHAR2(150)
CITY_ADDRESS VARCHAR2(50)
STATE_ADDRESS VARCHAR2(50)
PROVINCE_ADDRESS VARCHAR2(50)
COUNTRY_ADDRESS VARCHAR2(50)
POSTAL_CODE VARCHAR2(12)
CUSTOMER_PHONE VARCHAR2(20)
A promotional sale is being advertised to the customers in France. Which WHERE clause identifies customers that are located in France?（）

A. WHERE lower(country_address) = "france"
B. WHERE lower(country_address) = 'france'
C. WHERE lower(country_address) IS 'france'
D. WHERE lower(country_address) = '%france%'
E. WHERE lower(country_address) LIKE %france%

单项选择题

What is true about updates through a view? （）

A. You cannot update a view with group functions.
B. When you update a view group functions are automatically computed.
C. When you update a view only the constraints on the underlying table will be in effect.
D. When you update a view the constraints on the views always override the constraints on the underlying tables.