使用下面这个语言可以删除数据库中的信息。但如何在数据库中增加一个信息了？ 我尝试了把delete from 改为 insert into，但不行啊！！！
Dim db_connection As String = "server=localhost; database=个人收支管理系统;UID=sa; Password=123;Trusted_Connection=false"
        Dim conn As New SqlConnection
        conn.ConnectionString = db_connection
        conn.Open()
        Dim data As String
        data = InputBox("请输入要删除的用户名：", "输入用户名")
        Dim cmd As New SqlCommand
         = "delete from 个人收支信息     where 用户名=" & data & ""
        cmd.Connection = conn
        cmd.ExecuteNonQuery()
        MsgBox("已执行数据删除操作！")
        conn.Close()