在教师表(teacher)上建立姓名(tname)字段索引I_name的命令是:CREATEINDEXI_nameON()
A.teacher(t_name) B.t_name(teacher) C.teacher(I_name) D.(I_name(teacher)正确答案A
在教师表(teacher)上建立姓名(tname)字段索引I_name的命令是:CREATEINDEXI_nameON()
A.teacher(t_name) B.t_name(teacher) C.teacher(I_name) D.(I_name(teacher)正确答案A