使用integer where子句删除行？

Question

我有数据库，我想删除包含整数值的_id列值的行。

这是我的数据库：

public class ContactDatabase extends SQLiteOpenHelper {
    SQLiteDatabase db;
    public static final String DATABASE_NAME="totalContact.db";
    public static final  String TABLE_NAME="mecontact";
    public static final  String NAME="name";
    public static final  String PHONE="phone";
    public static final  String UID="_id";


    public ContactDatabase(Context context) {
        super(context, DATABASE_NAME, null, 1);

    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        try {
            db.execSQL("create table mecontact" +
                    "(_id integer primary key autoincrement, name text, phone text)");
        }catch(android.database.SQLException e){
                System.out.println("table create nhi ho rha");
        }
    }
 public void deleteContact(String d,int pos){
        db=this.getWritableDatabase();
    {String.valueOf(pos) });
        db.delete(TABLE_NAME, "_id  =  ?", new String[]{String.valueOf(pos)});

        db.close();
    }
}

我使用了很多查询，例如：

db.delete(TABLE_NAME, UID + "= ?", new String[] {String.valueOf(pos) });
db.delete(TABLE_NAME, "name = ? '" + d + "'"  + "  AND _id ? = ", new String[] {String.valueOf(pos) } );
db.delete(TABLE_NAME, "name = ? AND _id = " + pos, new String[]{ d });

但是没有人在工作，所以我很沮丧。