如何使用greendao执行SELECT dateTime FROM TABLE_NAME

Question

如何使用greendao执行SELECT dateTime FROM TABLE_NAME。

我正在尝试从“TABLE_NAME。”表中获取coulmn日期时间。

Answer 1

要获取单个列，您需要使用原始查询

private static final String SQL_DISTINCT_DATE = "SELECT DISTINCT "+YourDao.Properties.EName.datetime+" FROM "+YourDao.TABLENAME;

public static List<String> listEName(DaoSession session) {
    ArrayList<String> result = new ArrayList<String>();
    Cursor c = session.getDatabase().rawQuery(SQL_DISTINCT_DATE, null);
    try{
        if (c.moveToFirst()) {
            do {
                result.add(c.getString(0));
            } while (c.moveToNext());
        }
    } finally {
        c.close();
    }
    return result;
}