View the Exhibit for some of the current parameter settings. A user logs in to the HR schema and issues the following commands:SQL> CREATE TABLE emp(empno NUMBER(3),ename VARCHAR2(20),sal NUMBER(8,2));SQL> INSERT INTO emp(empno,ename) VALUES(1,‘JAMES‘);At
题目
View the Exhibit for some of the current parameter settings. A user logs in to the HR schema and issues the following commands:SQL> CREATE TABLE emp(empno NUMBER(3),ename VARCHAR2(20),sal NUMBER(8,2));SQL> INSERT INTO emp(empno,ename) VALUES(1,‘JAMES‘);At this moment, a second user also logs in to the HR schema and issues the following command:SQL> ALTER TABLE emp MODIFY sal NUMBER(10,2);What happens in the above scenario?（）
A. The second user‘s session immediately produces the resource busy error.
B. The second user‘s command executes successfully.
C. The second user‘s session waits for a time period before producing the resource busy error.
D. A deadlock is created.
相似考题
更多“View the Exhibit for some of the current parameter settings. A user logs in to the HR sche ”相关问题
-
第1题：
进入系统视图模式的命令是()A. Ctrl+Z
B.Ctrl+]
C.system-view
D.user-view
参考答案C
-
第2题：
在系统视图下键入什么命令可以切换到用户视图?()A.system-view
B.router
C.quit
D.user-view
参考答案：C
-
第3题：
在用户视图下键入什么命令可以切换到系统视图？
A．system-view
B．interface
C．quit
D．user-view
quit -
第4题：
在Windows XP中,用户安装的驱动程序记录在注册表的HKEY_CURRENT_USER配置单元。A．错误
B．正确
参考答案：A
-
第5题：
Who is that man over there? Do you know（）name?
Ahis
Bhe’s
Che
A
略 -
第6题：
下列Moore型状态机采用Verilog语言说明部分正确的是：
A．parameter [2:0] s0=0, s1=1,s2=2,s3=3,s4=4; reg [2:0] current_state, next_state;
B．parameter [1:0] s0=0, s1=1,s2=2,s3=3,s4=4; reg [1:0] current_state, next_state;
C．TYPE FSM_ST IS (s0, s1,s2,s3,s4); SIGNAL current_state, next_state: FSM_ST;
D．typedef enum {s0, s1,s2,s3,s4} type_user; type_user current_state, next_state
parameter [2:0] s0=0, s1=1,s2=2,s3=3,s4=4; reg [2:0] current_state, next_state;