如果我们想要去掉某一个元素的上边框，下面写法中不正确的是（ ）。 A: order-top:not; B: order-top:none; C: order-top:0; D: order-top:0px;

用SQL语句显示工资表中工资最高的三位职工的记录，应该使用命令______。 A: SELECT * TOP FROM 工资 ORDER BY 工资 DESC B: SELECT 3 FROM 工资 ORDER BY 工资 C: SELECT TOP 3 * FROM 工资 ORDER BY 工资 DESC D: SELECT *TOP FROM 工资 ORDER BY 工资

BookStore数据库中有订单表Order(OrderCode, CustomerCode, TotalPrice, Address, OrderTime, OrderStatus) SELECT TOP 3 OrderCode,OrderTime,OrderStatus FROM [Order]语句中TOP 3的含义是________。

The climax and conclusion are put at the top of the introduction, and then less important material is arranged in ( ) order

从工资表中查询工资最高的3位职工的全部信息，正确的命令是（ ）。 A: SELECT * FROM 职工 ORDER BY 工资 DESC LIMIT 3 B: SELECT ALL FROM 职工 ORDER BY 工资DESC C: SELECT * TOP 3 FROM 职工 ORDER BY 工资 D: SELECT DISTINCT 工资 TOP 3 FROM 职工 ORDER BY 工资DESC

在“成绩”表中，查找出“期末”成绩排在前5位的记录，正确的SQL命令是（ ） A: SELECT TOP 5 期末 FROM 成绩 GROUP BY 期末 DESC B: SELECT TOP 5 期末 FROM 成绩 GROUP BY 期末 C: SELECT TOP 5 期末 FROM 成绩 ORDER BY 期末 DESC D: SELECT TOP 5 期末 FROM 成绩 ORDER BY 期末

They climbed to the top of the building ______ they could get a bird-eye view of the city. A: though B: in order that C: for which D: that

【单选题】在"成绩"表中,查找出"考试成绩排在前5位的记录,正确的SQL命令是()? A. SELECT TOP 5 考试成绩 FROM 成绩GROUP BY 考试成绩 DESC B. SELECT TOP 5 考试成绩 FROM 成绩 GROUP BY 考试成绩 C. SELECT TOP 5 考试成绩 FROM 成绩 ORDER BY 考试成绩 DESC D. SELECT TOP 5考试成绩 FROM 成绩 ORDER BY 考试成绩

设有选课表（学号，课程号，成绩），现要查询考试成绩最高的三个学生的学号、课程号和成绩，包括并列情况，下列正确的查询语句是（ ）。 A: SELECT TOP 3 学号，课程号，成绩 FROM 选课表 order by 成绩 B: SELECT TOP 3 学号，课程号，成绩 FROM 选课表 order by 成绩 desc C: SELECT TOP 3 with ties 学号，课程号，成绩 FROM 选课表 order by 成绩 desc D: SELECT TOP 3 with ties 学号，课程号，成绩 FROM 选课表 order by 成绩

返回查询结果的前n行，应使用（）关键字。 A: TOP B: ORDER BY C: GROUP BY D: DELETE