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多项选择题
A. os
B. local
C. -8：00
D. dbtimezone Li
E. Australia
单项选择题
A. Pivoting INSERT
B. Unconditional INSERT
C. Conditional ALL INSERT
D. Conditional FIRST INSERT
单项选择题
A. xxx-xxx-xxxx
B. （xxx） xxxxxxx
C. （xxx） xxx-xxxx
D. xxx-（xxx）-xxxx
单项选择题
A. displaying the total order value for sales representatives 161 and 163
B. displaying the order total for sales representative 161 in the year 1999
C. displaying the number of orders that have order mode online and order date in 1999
D. displaying the number of orders whose order total is more than the average order total for all online orders
多项选择题
A. When a table is dropped， the corresponding indexes are automatically dropped.
B. For each DML operation performed， the corresponding indexes are automatically updated.
C. Indexes should be created on columns that are frequently referenced as part of an expression.
D. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a uniqueindex.
单项选择题
A. It would be automatically enabled and deferred.
B. It would be automatically enabled and immediate.
C. It would remain disabled and has to be enabled manually using the ALTER TABLE command.
D. It would remain disabled and can be enabled only by dropping the foreign key constraint and re-creating it.
单项选择题
A. It returns versions of rows only within a transaction.
B. It can be used in subqueries contained only in a SELECT statement.
C. It will return an error if the undo retention time is less than the lower bound time or SCN specified.
D. It retrieves all versions including the deleted as well as subsequently reinserted versions of the rows.
单项选择题
A. The PRIMARY KEY is created along with a new index.
B. The PRIMARY KEY is created and it would use an existing unique index.
C. The PRIMARY KEY would be created in a disabled state because it is using an existing index.
D. The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.
单项选择题
A. PUBLIC should be replaced with specific usernames.
B. ALL should be replaced with a list of specific privileges.
C. WITH GRANT OPTION should be added to the statement.
D. Separate GRANT statements are required for ORDERS and ORDERJTEMS tables.
单项选择题
A. The ORDERS_MASTER table would contain the ORDERJDs 1 and 2.
B. The ORDERS_MASTER table would contain the ORDERJDs 1， 2 and 3.
C. The ORDERS_MASTER table would contain the ORDERJDs 1， 2 and 4.
D. The ORDERS MASTER table would contain the ORDER IDs 1， 2， 3 and 4.
The query was written to format the PHONE_NUMBER for the employees. 
