5-45、查询“商品”表中的前10%的记录，正确的语句是__________。 A: SELECT TOP 10% * FROM 商品 B: SELECT TOP 10 PERCENT FROM 商品 C: SELECT TOP 10 PERCENT * FROM 商品 D: SELECT TOP 10% FROM 商品

3. China's top 10 export markets account for approximately _________ of the country's exports. A: sixty percent B: seventy percent C: eighty percent D: ninety percent

SQL语句"SELECT * TOP 10 PERCENT FROM 订单 ORDER BY 金额 DESC"的查询结果是订单中金额最高的_____的订单信息.

如果表中有100条记录，你希望检索头25条，则应选择下面哪些TOP子句___。 A: top percent 25 B: top 25 C: top 1 to 25 D: 25 top

假设数据表 “test1”中有 10 条记录，可获得最前面两条记录的命令为（ ） A: SELECT 2 * FROM test1 B: SELECT TOP 2 * FROM test1 C: SELECT PERCENT 2 * FROM test1 D: SELECT PERCENT 20 * FROM test1

If the nominal interest rate per year is 10 percent and the inflation rate is 4 percent, what is the real rate of interest? A: 10.0 percent B: 4.1 percent C: 5.8 percent D: 14.0 percent

The duration of a ten - year, 10 percent coupon bond when the interest rate is 10 percent is 6.76 years. What happens to the price of the bond if the interest rate falls to 8 percent?

An engine converts 5,000 J of thermal energy into 2,500 J of work. What is the efficiency of the engine? A: 10 percent B: 20 percent C: 50 percent D: 100 percent

SELECT查询时，只显示查询结果的前N行，使用的子句是：（ ）。 A: ALL TOP N B: TOP N C: PERCENT D: DISTINCT

What is the percentage of peoplewho have read 2-3 books last year according to the survey result? A: Lessthan 10 percent B: About20 percent C: Morethan 20 percent D: About40 percent