The acceptance letter must contain the order number and date as well as other information concerning the execution of the order.()
The acceptance letter must contain the order number and date as well as other information concerning the execution of the order.()
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有下列程序,在横线添加;includeusing namespace std;class TestClass{public:TestCla 有下列程序，在横线添加； #include＜iostream＞ using namespace std; class TestClass { public: TestClass (int n){number=n;} ______//拷贝构造函数 ～TestClass(){} private: int number; }; TestClass fun(TestClass p) { TestClass temp(P); return temp; } int main() { TestClsss obj1(10),obj2(0); TestClass obj3(obj1); obj2=fun(obj3); return 0; }A．TestClass(TestClass other){number=other.number;}B．TestClass(TestClass other){number=other.number;}C．TestClass(TestClass other){number;}D．TestClass(other){number=other.number;}
有以下程序,在横线应添加()。includeusing namespace std;class TestClass{public:Tes 有以下程序，在横线应添加( )。 #include＜iostream＞ using namespace std; class TestClass { public: TestClass(int n){number=n;} ______∥拷贝构造函数 ～TestClass(){} private: int number; }: TestClass fun(TestClass P) { TestClass temp(p); return temp; } int main() { TestClass obj1(10), obj2(0)； TestClass obj3(obj1); obj2=fun(obj3); return 0; }A．TestClass(TestClass other){number=other.number;}B．TestClass(TestClass other){number=other.number;}C．TestClass(TestClass other){number;)D．TestClass(other){number=other.number;}
在Oracle中,语句()将ORDER_DATE日期值’2000年3月18日’显示为‘2000年1月1日’。 A.SELECTROUND(order_date,’day’)FROMinventoryB.SELECTROUND(order_date,’YEAR’)FROMinventoryC.SELECTROUND(order_date,’month’)FROMinventoryD.SELECTROUND(to_char(order_date,’yyyy’))FROMinventory
Which statement accomplish this? () A. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);B. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);C. CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);D. CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE = SYSDATE);E. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE = SYSDATE);F. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE DEFAULT SYSDATE);
You need to create a table named ORDERS that contain four columns:1. an ORDER_ID column of number data type2. aCUSTOMER_ID column of number data type3. an ORDER_STATUS column that contains a character data type4. aDATE_ORDERED column to contain the date the order was placed.When a row is inserted into the table, if no value is provided when the order was placed, today‘s date should be used instead.Which statement accomplishes this? （）A. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);B. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);C. CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);D. CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);E. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE = SYSDATE);F. CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE DEFAULT SYSDATE);
Examine the SQL statement that creates ORDERS table:CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL, STATUS VARCHAR2(10) CHECK (status IN (‘CREDIT‘, ‘CASH‘)), PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order_id, order_date));For which columns would an index be automatically created when you execute the above SQL statement? （）A. SER_NOB. ORDER_IDC. STATUSD. PROD_IDE. ORD_TOTALF. composite index on ORDER_ID and ORDER_DATE
Examine the SQL statements that creates ORDERS table:For which columns would an index be automatically created when you execute the above SQL statement? () A. SER_NOB. ORDER_IDC. STATUSD. PROD_IDE. ORD_TOTALF. Composite index on ORDER_ID and ORDER_DATE
针对数据库bookshop，创建视图sale_item_view，该视图中包含订单编号、订货日期、图书编号及数量。可以使用以下SQL语句实现： create view sale_item_view（order_no，order_date，book_no，qty） as select sales.order_no,sales.order_date,book_no,qty from sales,sale_item where sales.order_no=sale_item.order_no
NUMBER类型不能隐式转换为DATE类型。