多选题
Which three possible values can be set for the TIME_ZONE session parameter by using the ALTER SESSION command？ （）
os
local
-8：00
dbtimezone Li
Australia
单选题
View the Exhibit and examine the structure of the EMP table. You executed the following command to add a primary key to the EMP table： ALTER TABLE emp ADD CONSTRAINT emp_id_pk PRIMARY KEY （emp_id） USING INDEX emp_id_idx； Which statement is true regarding the effect of the command？（）
The PRIMARY KEY is created along with a new index.
The PRIMARY KEY is created and it would use an existing unique index.
The PRIMARY KEY would be created in a disabled state because it is using an existing index.
The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.
多选题
Which statements are correct regarding indexes？ （）
When a table is dropped， the corresponding indexes are automatically dropped.
For each DML operation performed， the corresponding indexes are automatically updated.
Indexes should be created on columns that are frequently referenced as part of an expression.
A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a uniqueindex.
单选题
Evaluate the following SQL statements that are issued in the given order： What would be the status of the foreign key EMP_MGR_FK？（）
It would be automatically enabled and deferred.
It would be automatically enabled and immediate.
It would remain disabled and has to be enabled manually using the ALTER TABLE command.
It would remain disabled and can be enabled only by dropping the foreign key constraint and re-creating it.
多选题
View the Exhibit and examine the data in the PRODUCT INFORMATION table. Which two tasks would require subqueries？ （）
displaying the minimum list price for each product status
displaying all supplier IDs whose average list price is more than 500
displaying the number of products whose list prices are more than the average list price
displaying all the products whose minimum list prices are more than the average list price of products having the product status orderable
displaying the total number of products supplied by supplier 102071 and having product status OBSOLETE
单选题
Evaluate the following statement： Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement？（）
They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.
They are evaluated by the first WHEN clause. If the condition is true， then the row would be evaluated by the subsequent WHEN clauses.
They are evaluated by the first WHEN clause. If the condition is false， then the row would be evaluated by the subsequent WHEN clauses.
The INSERT statement would give an error because the ELSE clause is not present for support in case none of the WHEN clauses are true.
单选题
The details of the order ID， order date， order total， and customer ID are obtained from the ORDERS table. If the order value is more than 30000， the details have to be added to the LARGEjDRDERS table. The order ID， order date， and order total should be added to the ORDERJHISTORY table， and order ID and customer ID should be added to the CUSTJHISTORY table. Which multitable INSERT statement would you use？ （）
Pivoting INSERT
Unconditional INSERT
Conditional ALL INSERT
Conditional FIRST INSERT
多选题
Which two statements are true regarding the execution of the correlated subqueries？（）
The nested query executes after the outer query returns the row.
The nested query executes first and then the outer query executes.
The outer query executes only once for the result returned by the inner query.
Each row returned by the outer query is evaluated for the results returned by the inner query.
单选题
View the Exhibit and examine the details of the EMPLOYEES table. The query was written to format the PHONE_NUMBER for the employees. Which option would be the correct format in the output？（）
xxx-xxx-xxxx
（xxx） xxxxxxx
（xxx） xxx-xxxx
xxx-（xxx）-xxxx
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