Question

SQL = "insert into Student values(" + num+ "," + name + ","+ age + ")";这句name插不进ACCESS数据库，

name是String类型，access中的name为文本类型

Answer 1

a=cov.in32(mane.string());
SQL = "insert into Student values(" + num+ "," + a + ","+ age + ")";
LZ试试，数据类型转换成int类型
或者
SQL = "insert into Student values(" + num+ ",‘" + name + "’,"+ age + ")";
也可以

Answer 2

因为 name 是关键字, 建立数据库或建表时应避免使用关键字,
试试加上中括号:
SQL = "insert into Student values(" + num+ "," + [name] + ","+ age + ")";