问题
单项选择题 A1型题
构成比之和为()
A.100%
B.<100%
C.>100%
D.不确定值
E.100
答案
参考答案:A
构成比之和为()
A.100%
B.<100%
C.>100%
D.不确定值
E.100
参考答案:A
(31)到(35)题使用下列数据表。 仓库(仓库号C(3)、所在地C(8)、人数N(2)) 职工(仓库号C(3)、职工号C(2)、姓名C(8)、工资I) |
检索最少有4名职工仓库的职工平均工资( )。
A.SELECT 仓库号,COLINT(*) AS 人数,AVG(工资) AS 平均工资 FROM 职工; GROUP BY 仓库号 WHERE COUNT(*)>=4
B.SELECT 仓库号,COUNT(*) AS 人数,AVG(工资) AS 平均工资 FROM 职工; GROUP BY 仓库号 HAVING COUNT(*)>=4
C.SELECT 仓库号,COUNT(*) AS 人数,AVG (工资) AS 平均工资 FROM 职工; GROUP BY 职工号 WHERE COUNT(*)>=4
D.SEIECT 仓库号,COUNT(*) AS 人数,AVG(工资) AS 平均工资 FROM 职工; GROUP BY 职工号 HAVING COUNT(*)>=4