單項(xiàng)選擇題

Evaluate the following statement：

Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement？（）

A. They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.
B. They are evaluated by the first WHEN clause. If the condition is true， then the row would be evaluated by the subsequent WHEN clauses.
C. They are evaluated by the first WHEN clause. If the condition is false， then the row would be evaluated by the subsequent WHEN clauses.
D. 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.

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多項(xiàng)選擇題

View the Exhibit and examine the data in the PRODUCT INFORMATION table.

Which two tasks would require subqueries？（）

A. displaying the minimum list price for each product status
B. displaying all supplier IDs whose average list price is more than 500
C. displaying the number of products whose list prices are more than the average list price
D. displaying all the products whose minimum list prices are more than the average list price of products having the product status orderable
E. displaying the total number of products supplied by supplier 102071 and having product status OBSOLETE

單項(xiàng)選擇題

Evaluate the CREATE TABLE statement：
CREATE TABLE products
（product_id NUMBER （6）
CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））；
Which statement is true regarding the PROD_ID_PK constraint？（）

A. It would be created only if a unique index is manually created first.
B. It would be created and would use an automatically created unique index.
C. It would be created and would use an automatically created nonunique index.
D. It would be created and remains in a disabled state because no index is specified in the command.

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Evaluate the following statement： Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement？（）

你可能感興趣的試題

View the Exhibit and examine the data in the PRODUCT INFORMATION table. Which two tasks would require subqueries？ （）

Evaluate the CREATE TABLE statement： CREATE TABLE products （product_id NUMBER （6） CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））； Which statement is true regarding the PROD_ID_PK constraint？（）

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Evaluate the following statement：

Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement？（）

View the Exhibit and examine the data in the PRODUCT INFORMATION table.

Which two tasks would require subqueries？（）

Evaluate the CREATE TABLE statement：
CREATE TABLE products
（product_id NUMBER （6）
CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））；
Which statement is true regarding the PROD_ID_PK constraint？（）