设B={a,c,e,f,g,h}删除字母e和h? Delete[B,-4];Delete[B,6]|Delete[B,{{3},{6}}]|Delete[B,{3,6}]|Delete[B,3]; Delete[B,-1]
举一反三
- 设B={a,c,e,f,g,h}删除字母e和h A: Delete[B,{{3},{6}}] B: Delete[B,3]; Delete[B,-1] C: Delete[B,-4];Delete[B,6] D: Delete[B,{3,6}]
- 职工表中有字符型字段“职工号”，用SQL DELETE命令将以字母H开头的职工记录删除，正确的命令是（ ）。 A: DELETE FOR 职工号 LIKE “H%” B: DELETE WHILE 职工号 LIKE ”H%” C: DELETE WHERE 职工号=”H*” D: DELETE FROM 职工表 WHERE 职工号 LIKE “H%”
- 在数据表employee中根据id删除员工信息，下列@Delete注解的写法正确的是（）。 A: @Delete("delete from employee where id = ?") B: @Delete("delete from employee") C: @Delete( delete from employee where id = D: {id} ) E: 以上说法都不正确
- 删除商品信息表Goods中的所有信息的语句() A: DELETE B: DELETE FROM C: DELETE FROM Goods D: DELETE DATABASE
- 直接永久删除文件的快捷键是（ ） A: Esc+Delete B: Alt+ Delete C: Ctrl+ Delete D: Shift+ Delete