问题
判断题
各电阻上分配的电压与各自电阻的阻值成反比。
答案
参考答案：错
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各电阻上分配的电压与各自电阻的阻值成反比。
参考答案：错
| (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