单项选择题
pl/sql中有4条与游标有关的语句,他们在程序中出现的正确顺序是()
1 open abc
2 cursor abc is select ename from emp
3 fetch abc into vname
4 close abc
A.1234
B.2134
C.2314
D.1324
点击查看答案&解析

单项选择题
pl/sql中有4条与游标有关的语句,他们在程序中出现的正确顺序是()
1 open abc
2 cursor abc is select ename from emp
3 fetch abc into vname
4 close abc
A.1234
B.2134
C.2314
D.1324
微信扫一扫,加关注免费搜题