从数据库sqlite获取信息

Question

如何从数据库中获取信息.我想执行这一行

String nom = db.execSQL("select name from person where id='+id+'");

任何人都可以纠正我这一行,从表格中获取人的姓名

Answer 1

如果您的id是整数数据类型,请尝试此操作.

public String getResult(int id)
{
    String name = null;
    try
    {
        Cursor c = null;
        c = db.rawQuery("select name from person where id="+id, null);
        c.moveToFirst();
        name = c.getString(c.getColumnIndex("name"));
        c.close();
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
    return name; 
}

如果您的id是String数据类型,请尝试此操作.

 public String getResult(String id)
{
    String name = null;
    try
    {
        Cursor c = null;
        c = db.rawQuery("select name from person where id=" + "\""+id+"\"", null);
        c.moveToFirst();
        name = c.getString(c.getColumnIndex("name"));
        c.close();
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
    return name; 
}