iOS sqlite查询当天日期的数据

  }
    NSString*timeFormat = @"%Y-%m-%d";
    NSString * sql = [NSString stringWithFormat:@"select *  from T_TRAVEL_EXPENSE_RETURNTRIP where
strftime('%@','now') = strftime('%@',SRV_DATE) and USER_ID='%@'  order by CREATE_TIME desc",timeFormat,timeFormat,userId];

    if([db open])
    {
        FMResultSet * rs = [db executeQuery:sql];
        while ([rs next])
        {