为查询Products表中,价格Price在5－10元之间的产品信息，请补全以下SELECT语句 SELECT ProductID,ProductName,Price FROM products WHERE_________ AND_________
为查询Products表中,价格Price在5－10元之间的产品信息，请补全以下SELECT语句 SELECT ProductID,ProductName,Price FROM products WHERE_________ AND_________
有如下SQL语句: SELECT DISTINCT productName, price FROM product WHERE (price>;(SELECT AVG(price) FROM product)) ORDER BY price DESC; 下面说法错误的是( )。 A: "SELECT AVG(price) FROM product "是子查询 B: "ORDER BY price DESC"是指按price从低到高顺序排列 C: 查询结果显示的是大于平均价格的产品记录 D: 此查询显示的字段只有"productName"和"price"
有如下SQL语句: SELECT DISTINCT productName, price FROM product WHERE (price>;(SELECT AVG(price) FROM product)) ORDER BY price DESC; 下面说法错误的是( )。 A: "SELECT AVG(price) FROM product "是子查询 B: "ORDER BY price DESC"是指按price从低到高顺序排列 C: 查询结果显示的是大于平均价格的产品记录 D: 此查询显示的字段只有"productName"和"price"
阿里云附物联网平台“一机一密”进行设备登录时，登录信息三元组指： A: ProductKey、DeviceName、DeviceSecret B: ProductName、DeviceName、DeviceSecret C: ClientID、Username、Password D: DeviceName,Username,Password
阿里云附物联网平台“一机一密”进行设备登录时，登录信息三元组指： A: ProductKey、DeviceName、DeviceSecret B: ProductName、DeviceName、DeviceSecret C: ClientID、Username、Password D: DeviceName,Username,Password
为查询Products表中,价格Price在5－10元之间的产品信息，请补全以下SELECT语句 SELECT ProductID,ProductName,Price FROM products WHERE_________ AND_________ A: price>=5,price<=10 B: price>5,price<10 C: price<=5,price<=10 D: price>=5,price>=10
为查询Products表中,价格Price在5－10元之间的产品信息，请补全以下SELECT语句 SELECT ProductID,ProductName,Price FROM products WHERE_________ AND_________ A: price>=5,price<=10 B: price>5,price<10 C: price<=5,price<=10 D: price>=5,price>=10
创建一个DataSet对象用一个MicrosoftSQLServer数据库中的表Products来填充信息。该对象在一个DataTable名也叫Products的对象中必须包括ProductID，ProductName和UnitsinStock列。初始化一个SqlConnection对象myConnection，需要编写代码来填充DataSet对象，使用以下哪个代码段？（） A: A B: B C: C D: D
创建一个DataSet对象用一个MicrosoftSQLServer数据库中的表Products来填充信息。该对象在一个DataTable名也叫Products的对象中必须包括ProductID，ProductName和UnitsinStock列。初始化一个SqlConnection对象myConnection，需要编写代码来填充DataSet对象，使用以下哪个代码段？（） A: A B: B C: C D: D
你创建了一个使用MicrosoftSQLServer2005数据库中的Products表填充的DataSet对象.该DataSet对象中有一个名为Products的包含ProductID，ProductName和UnitsinStock三列的DataTable对象.现初始化一个SqlConnection对象myConnection，并编写代码来填充DataSet对象，请问你应该使用以下哪个代码段？（） A: A B: B C: C D: D
你创建了一个使用MicrosoftSQLServer2005数据库中的Products表填充的DataSet对象.该DataSet对象中有一个名为Products的包含ProductID，ProductName和UnitsinStock三列的DataTable对象.现初始化一个SqlConnection对象myConnection，并编写代码来填充DataSet对象，请问你应该使用以下哪个代码段？（） A: A B: B C: C D: D
You are modifying a table named Product in a SQL Server 2005 database. You want to add a new column named FriendlyName to the Product table. A friendly name for each product will be stored in this column. The table currently contains data. Thesales department has not yet created a friendly name for each product. FriendlyName is a required value for each product. You want to add this new column by using the least amount of effort. What should you do？（） A: Define the new column as NUL B: Update the FriendlyName column to the same valueas the productName column. Alter the FriendlyName column to be NOT NUL C: D: Define the new column as NOT NULL with a default value of ’Undefined.’ E: Define the new column as NUL F: Use application logic to enforce the data constraint. G: Define the new column as NULL with a default value of ’Undefined.’
You are modifying a table named Product in a SQL Server 2005 database. You want to add a new column named FriendlyName to the Product table. A friendly name for each product will be stored in this column. The table currently contains data. Thesales department has not yet created a friendly name for each product. FriendlyName is a required value for each product. You want to add this new column by using the least amount of effort. What should you do？（） A: Define the new column as NUL B: Update the FriendlyName column to the same valueas the productName column. Alter the FriendlyName column to be NOT NUL C: D: Define the new column as NOT NULL with a default value of ’Undefined.’ E: Define the new column as NUL F: Use application logic to enforce the data constraint. G: Define the new column as NULL with a default value of ’Undefined.’