查询scott用户的emp表中的总记录数，可以使用下列哪个语句？

解锁scott用户的正确命令是_______。 A: update user scott account unlock B: alert user scott account unlock C: update user scott unlock D: alert user scott unlock

What will Mr. Grant do to Mr. Scott’s idea A: He will think about Mr. Scott’s idea. B: He will copy Mr. Scott’s idea. C: He will object to Mr. Scott’s idea.

Scott'shistoricalnovelstouchuponthesubje...ofEuropeancountries.

Walter Scott was ______.

以下能删除表的语句是( ) A: Delete * from emp B: Drop database emp C: Drop * from emp D: delete database emp

Woman: Mr. Scott came back from L. A. very late yesterday. Man: So, even if he had been able to attend the party, he would have arrived late. Question: What do we learn about Mr. Scott A: Mr. Scott was late for the party. B: Mr. Scott didn't attend the party at all. C: Mr. Scott attended the party. D: Mr. Scott did not like attending parties.

查询scott用户的emp表中的总记录数,可以使用下列哪个语句?() A: SELECT MAX(empno) FROM scott.emp; B: SELECT<br/>COUNT(empno) FROM scott.emp; C: SELECT COUNT(comm) FROM scott.emp; D: SELECT COUNT(*) FROM scott.emp;

中国大学MOOC: 数组a是个整数数组且已有数据，如要在a中查找InputBox中输入的数字，并输出其下标。程序如下，请在_________处填入适当的内容，完善程序。 Dim i%, idx%, key% key = Val(InputBox("输入要查找的数字")) idx = -1 For i = 0 To UBound(a) If a(i) = key Then _________ Exit For End If Next If idx >= 0 Then MsgBox ("下标为" & idx) Else MsgBox ("找不到此数字") End If

熔融沉积成型工艺的发明人是( )。 A: Chuck Hull B: 颜永年 C: Scott Crump D: Scott Karl