河南成教 / 数据库基础与应用
正确率:100%
现有表Employee,字段:id (int),firstname(varchar), lastname(varchar); 以下sql语句错误的是
A.select firstname+'.'+lastname as 'name' from employee
B.select firstname+'.'+lastname='name' from employee
C.select 'name'=firstname+'.'+lastname from employee
D. select firstname,lastname from employee
参考答案:
佳题速递: