In order to maintain security， with which hop count are IPv6 neighbor discovery packets sent？（）A、0B、1C、255D、256
In order to maintain security， with which hop count are IPv6 neighbor discovery packets sent？（）
- A、0
- B、1
- C、255
- D、256
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设有订单表order(其中包含字段：订单号，客户号，职员号，签订日期，金额)，查询2007年所签订单的信息，并按金额降序排序，正确的SQL命令是( )。A．SELECT * FROM order WHERE YEAR(签订日期)=2007 ORDER BY 金额 DESCB．SELECT * FROM order WHILE YEAR(签订日期)=2007 ORDER BY 金额 ASCC．SELECT * FROM order WHERE YEAR(签订日期)=2007 ORDER BY 金额 ASCD．SELECT * FROM order WHILE YEAR(签订日期)=2007 ORDER BY 金额 DESC
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The ORDERS table has these columns:ORDER_ID NUMBER(4) NOT NULLCUSTOMER_ID NUMBER(12) NOT NULLORDER_TOTAL NUMBER(10,2)The ORDERS table tracks the Order number, the order total, and the customer to whom the Order belongs.Which two statements retrieve orders with an inclusive total that ranges between 100.00 and 2000.00 dollars? （）A. SELECT customer_id, order_id, order_total FROM orders RANGE ON order _ total (100 AND 2000) INCLUSIVE;B. SELECT customer_id, order_id, order_total FROM orders HAVING order _ total BETWEEN 100 and 2000;C. SELECT customer_id, order_id, order_total FROM orders WHERE order _ total BETWEEN 100 and 2000;D. SELECT customer_id, order_id, order_total FROM orders WHERE order_total= 100 and = 2000;E. SELECT customer_id, order_id, order_total FROM orders WHERE order_total= 100 and order_total = 2000;
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（）is for the operation ordering and the information exchange by internet among the firms. A、order processingB、order makingC、Electronic order systemD、order form
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Which two statements are true regarding the ORDER BY clause? （）A、The sort is in ascending by order by default.B、The sort is in descending order by default.C、The ORDER BY clause must precede the WHERE clause.D、The ORDER BY clause is executed on the client side.E、The ORDER BY clause comes last in the SELECT statement.F、The ORDER BY clause is executed first in the query execution.
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