语句SELECT SUBSTRING('ABCDEFG',3,3), LOCATE('AB','TABLE');的执行结果是()。
A、CDE,1
B、DEF,1
C、CDE,2
D、DEF,2
A.SELECT*FROMpingshifen_homeworkStatisticsWHEREtype=1ANDstatus=1
B.SELECT*FROMpingshifen_homeworkStatisticsWHEREtype=1
C.SELECT*FROMpingshifen_homeworkStatisticsWHEREstatus=1
D.SELECT*FROMpingshifen_homeworkStatistics
A.select count(all) from emp;
B.select count(emp_id) from emp;
C.select count(*) from emp;
D.select count(1) from emp;
A.赋予username用户在任意用户任意表的select权限
B.登录到username用户
C.不赋予username用户选择权限
D.赋予username用户全局在任意表任意列的select权限
A.当前页
B.每页显示的条数
C.起始位置
D.总条数