查看表PRODUCTS的LIST_PRICE和MIN_PRICE字段,哪两个表达式能得到一样的结果() A: NVL(NULLIF(list_price,min_price),0) B: NVL(COALESCE(list_price,min_price),0) C: NVL2(COALESCE(list_price,min_price),min_price,0) D: COALESCE(NVL2(list_price,list_price,min_price),0)
查看表PRODUCTS的LIST_PRICE和MIN_PRICE字段,哪两个表达式能得到一样的结果() A: NVL(NULLIF(list_price,min_price),0) B: NVL(COALESCE(list_price,min_price),0) C: NVL2(COALESCE(list_price,min_price),min_price,0) D: COALESCE(NVL2(list_price,list_price,min_price),0)
查询book表中price字段的最大值,查询语句是: A: select max(price) from book; B: select min(price) from book; C: select price from min book; D: select price from max book;
查询book表中price字段的最大值,查询语句是: A: select max(price) from book; B: select min(price) from book; C: select price from min book; D: select price from max book;
BookStore数据库中有图书表Book(BookCode,BookName,Author,PublisherCode,PublishTimePublishTime是datetime类型。显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。SQL语句:SELECTMAX(Price)As最高价,MIN(Price)As最低价,Str(AVG(Price),6,2)As平均价()As最高价与最低价的差值FromBook A: (MAX-MIN)Price B: MAX(Price)-MIN(Price) C: (MAX-MIN)(Price) D: MAX:Price-MIN:Price
BookStore数据库中有图书表Book(BookCode,BookName,Author,PublisherCode,PublishTimePublishTime是datetime类型。显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。SQL语句:SELECTMAX(Price)As最高价,MIN(Price)As最低价,Str(AVG(Price),6,2)As平均价()As最高价与最低价的差值FromBook A: (MAX-MIN)Price B: MAX(Price)-MIN(Price) C: (MAX-MIN)(Price) D: MAX:Price-MIN:Price
BookStore数据库中有图书表Book(BookCode, BookName, Author, PublisherCode, PublishTime,BookSort, ISBN, BookPicture, ContentInro, Price, Discount),其中 PublishTime是datetime类型。显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。SQL语句:SELECT MAX(Price) As 最高价, MIN(Price) As 最低价, Str(AVG(Price),6,2) As 平均价,________ As 最高价与最低价的差值 From Book A: (MAX-MIN)Price B: MAX(Price)-MIN(Price) C: (MAX-MIN)(Price) D: MAX:Price-MIN:Price
BookStore数据库中有图书表Book(BookCode, BookName, Author, PublisherCode, PublishTime,BookSort, ISBN, BookPicture, ContentInro, Price, Discount),其中 PublishTime是datetime类型。显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。SQL语句:SELECT MAX(Price) As 最高价, MIN(Price) As 最低价, Str(AVG(Price),6,2) As 平均价,________ As 最高价与最低价的差值 From Book A: (MAX-MIN)Price B: MAX(Price)-MIN(Price) C: (MAX-MIN)(Price) D: MAX:Price-MIN:Price
显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。语句如下:SELECT Max(Price) AS 最高价, ________ AS 最低价, Str(Avg(Price),6,2) AS 平均价, Max(Price)-Min(Price) AS 最高价与最低价的差值FROM Book
显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。语句如下:SELECT Max(Price) AS 最高价, ________ AS 最低价, Str(Avg(Price),6,2) AS 平均价, Max(Price)-Min(Price) AS 最高价与最低价的差值FROM Book
Matt's utility function is min{x,4y + 5z}. The price of x is 1, the price of y is 4, and the price of z is 7. Matt's income is 8. How many units of x does Matt demand? A: 4 B: 7 C: 3.33 D: 5
Matt's utility function is min{x,4y + 5z}. The price of x is 1, the price of y is 4, and the price of z is 7. Matt's income is 8. How many units of x does Matt demand? A: 4 B: 7 C: 3.33 D: 5
BookStore数据库中有图书表Book(BookCode,BookName,Author,PublisherCode,PublishTime,BookSort,ISBN,BookPicture,ContentInro,Price,Discount),其中PublishTime是datetime类型。 显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。SQL语句: SELECTMAX(Price)As最高价,MIN(Price)As最低价,Str(AVG(Price),6,2)As平均价, ________As最高价与最低价的差值FromBook
BookStore数据库中有图书表Book(BookCode,BookName,Author,PublisherCode,PublishTime,BookSort,ISBN,BookPicture,ContentInro,Price,Discount),其中PublishTime是datetime类型。 显示图书的最高价、最低价、平均价、最高价与最低价之间的差值。SQL语句: SELECTMAX(Price)As最高价,MIN(Price)As最低价,Str(AVG(Price),6,2)As平均价, ________As最高价与最低价的差值FromBook
以下代码的输出结果是()。publicclassTest{publicstaticvoidmain(String[]args){double[]price=newdouble[5];price[0]=98.10;price[1]=32.18;price[2]=77.75;System.out.print((int)price[0]+""+(int)price[1]+""+(int)price[2]+""+(int)price[3]+""+(int)price[4]);}}
以下代码的输出结果是()。publicclassTest{publicstaticvoidmain(String[]args){double[]price=newdouble[5];price[0]=98.10;price[1]=32.18;price[2]=77.75;System.out.print((int)price[0]+""+(int)price[1]+""+(int)price[2]+""+(int)price[3]+""+(int)price[4]);}}
设变量已正确定义,选项()与以下程序段不等价。switch(choice){case1:price=3.0;case2:price=2.5;default:price=0.0;}A.price=0.0;B.switch(choice){default:price=0.0;case2:price=2.5;case1:price=3.0;}C.price=0.0;switch(choice){case1:price=3.0;case2:price=2.5;}D.if(choice==1){price=3.0;price=2.5;price=0.0;}elseif(choice==2){price=2.5;price=0.0;}else{price=0.0;}
设变量已正确定义,选项()与以下程序段不等价。switch(choice){case1:price=3.0;case2:price=2.5;default:price=0.0;}A.price=0.0;B.switch(choice){default:price=0.0;case2:price=2.5;case1:price=3.0;}C.price=0.0;switch(choice){case1:price=3.0;case2:price=2.5;}D.if(choice==1){price=3.0;price=2.5;price=0.0;}elseif(choice==2){price=2.5;price=0.0;}else{price=0.0;}
A—cost price B—factory priceC—net price D—price free on boardE—purchase price F—sale priceG—wholesale price H—purchase priceI—fixed price J—guaranteed priceK—cash price L—market priceM—preferential price N—piece priceO—price control P—maximum priceQ—minimum price ()批发价()单位价格
A—cost price B—factory priceC—net price D—price free on boardE—purchase price F—sale priceG—wholesale price H—purchase priceI—fixed price J—guaranteed priceK—cash price L—market priceM—preferential price N—piece priceO—price control P—maximum priceQ—minimum price ()批发价()单位价格