nullのレコードwhile節に他のデータを表示する方法は？

Question

私はテーブルの上に

CREATE TABLE `msattendance` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `regnum` varchar(20) DEFAULT NULL, 
    `reg_b` varchar(20) DEFAULT NULL, 
    `in_hr` time NOT NULL, 
    `out_hr` time NOT NULL, 
    `in_info` varchar(20) DEFAULT NULL, 
    `out_info` varchar(20) DEFAULT NULL, 
    `in_date` date DEFAULT NULL, 
    `out_date` date DEFAULT NULL, 
    `in_mechine` varchar(3) DEFAULT NULL, 
    `out_mechine` varchar(3) DEFAULT NULL, 
    `upload_date` date DEFAULT NULL, 
PRIMARY KEY (`id`), 
KEY `id` (`id`), 
KEY `nik` (`nik`), 
KEY `in_date` (`in_date`), 
KEY `out_date` (`out_date`), 
KEY `in_hr` (`in_hr`), 
KEY `out_hr` (`out_hr`) 
) 

値の例である出席テーブルを有する：

iは、クエリ

SELECT * FROM `msattendance` WHERE (in_date between '2017-11-23' and '2017-11-28') and reg_b = '5657' 

が、レコードID番号13を使用

+----+-----------+-------+----------+----------+---------+----------+------------+------------+------------+-------------+---------------------+---------------------+-------------+ 
 
| id | regnum | reg_b | in_hr | out_hr | in_info | out_info | in_date | out_date | in_mechine | out_mechine |  upload_time  | upload_time2  | upload_date | 
 
+----+-----------+-------+----------+----------+---------+----------+------------+------------+------------+-------------+---------------------+---------------------+-------------+ 
 
| 1 | 216115657 | 5657 | 07:36:00 | 15:17:00 | 1  | 2  | 2017-02-18 | 2017-02-18 | 2   | 2   | 2017-03-16 08:09:15 | 2017-03-16 08:11:42 | 2017-03-16 | 
 
| 2 | 216115657 | 5657 | 00:00:00 | 18:59:00 | NULL | 2  | NULL  | 2017-02-17 | NULL  | 2   | NULL    | 2017-03-16 08:09:15 | 2017-03-16 | 
 
| 3 | 216115657 | 5657 | 00:00:00 | 07:41:00 | NULL | 2  | NULL  | 2017-05-25 | NULL  | 4   | NULL    | 2017-05-30 15:32:45 | 2017-05-30 | 
 
| 4 | 216115657 | 5657 | 07:41:00 | 16:38:00 | 1  | 2  | 2017-05-26 | 2017-05-26 | 2   | 2   | 2017-05-30 15:51:07 | 2017-05-30 16:01:39 | 2017-05-30 | 
 
| 5 | 216115657 | 5657 | 00:00:00 | 16:40:00 | NULL | 2  | NULL  | 2017-05-25 | NULL  | 4   | NULL    | 2017-05-30 15:51:07 | 2017-05-30 | 
 
| 10 | 216115657 | 5657 | 07:44:00 | 16:45:00 | 1  | 2  | 2017-11-22 | 2017-11-22 | 2   | 4   | 2017-11-23 10:01:38 | 2017-11-23 10:07:04 | 2017-11-23 | 
 
| 11 | 216115657 | 5657 | 07:43:00 | 16:41:00 | 1  | 2  | 2017-11-23 | 2017-11-23 | 2   | 3   | 2017-11-23 10:07:04 | 2017-11-24 13:13:27 | 2017-11-23 | 
 
| 12 | 216115657 | 5657 | 07:43:00 | 16:33:00 | 1  | 2  | 2017-11-24 | 2017-11-24 | 3   | 4   | 2017-11-24 13:13:27 | 2017-11-25 09:50:05 | 2017-11-24 | 
 
| 13 | 216115657 | 5657 | 00:00:00 | 14:13:00 | 1  | 2  | NULL  | 2017-11-25 | NULL  | 4   | 2017-11-25 09:50:05 | 2017-11-27 10:32:51 | 2017-11-25 | 
 
| 14 | 216115657 | 5657 | 07:43:00 | 16:32:00 | 1  | 2  | 2017-11-27 | 2017-11-27 | 3   | 4   | 2017-11-27 10:32:51 | 2017-11-28 14:00:27 | 2017-11-27 | 
 
| 15 | 216115657 | 5657 | 07:43:00 | 00:00:00 | 1  | NULL  | 2017-11-28 | NULL  | 4   | NULL  | 2017-11-28 14:00:27 | NULL    | 2017-11-28 | 
 
+----+-----------+-------+----------+----------+---------+----------+------------+------------+------------+-------------+---------------------+---------------------+-------------+

現れない

私はmrのSQLコードを使用します。ナイジェル・レン

SELECT * FROM `msattendance` 
WHERE ((in_date between '2017-11-23' and '2017-11-28') 
     or in_date is null) 
    and reg_b = '5657' 

が、別の日には、外部の私が11月22日の日から11月28日に、テーブルの内容を表示することができますどのように

+--------+-----------+-------+----------+----------+---------+----------+------------+------------+------------+-------------+---------------------+---------------------+-------------+ 
 
| id | regnum | reg_b | in_hr | out_hr | in_info | out_info | in_date | out_date | in_mechine | out_mechine |  upload_time  | upload_time2  | upload_date | 
 
+--------+-----------+-------+----------+----------+---------+----------+------------+------------+------------+-------------+---------------------+---------------------+-------------+ 
 
| 1493 | 216115657 | 5657 | 00:00:00 | 18:59:00 | NULL | 2  | NULL  | 2017-02-17 | NULL  | 2   | NULL    | 2017-03-16 08:09:15 | 2017-03-16 | 
 
| 100526 | 216115657 | 5657 | 00:00:00 | 07:41:00 | NULL | 2  | NULL  | 2017-05-25 | NULL  | 4   | NULL    | 2017-05-30 15:32:45 | 2017-05-30 | 
 
| 101727 | 216115657 | 5657 | 00:00:00 | 16:40:00 | NULL | 2  | NULL  | 2017-05-25 | NULL  | 4   | NULL    | 2017-05-30 15:51:07 | 2017-05-30 | 
 
| 297283 | 216115657 | 5657 | 00:00:00 | 14:13:00 | 1  | 2  | NULL  | 2017-11-25 | NULL  | 4   | 2017-11-25 09:50:05 | 2017-11-27 10:32:51 | 2017-11-25 | 
 
| 293486 | 216115657 | 5657 | 07:44:00 | 16:45:00 | 1  | 2  | 2017-11-22 | 2017-11-22 | 2   | 4   | 2017-11-23 10:01:38 | 2017-11-23 10:07:04 | 2017-11-23 | 
 
| 294748 | 216115657 | 5657 | 07:43:00 | 16:41:00 | 1  | 2  | 2017-11-23 | 2017-11-23 | 2   | 3   | 2017-11-23 10:07:04 | 2017-11-24 13:13:27 | 2017-11-23 | 
 
| 296015 | 216115657 | 5657 | 07:43:00 | 16:33:00 | 1  | 2  | 2017-11-24 | 2017-11-24 | 3   | 4   | 2017-11-24 13:13:27 | 2017-11-25 09:50:05 | 2017-11-24 | 
 
| 298601 | 216115657 | 5657 | 07:43:00 | 16:32:00 | 1  | 2  | 2017-11-27 | 2017-11-27 | 3   | 4   | 2017-11-27 10:32:51 | 2017-11-28 14:00:27 | 2017-11-27 | 
 
| 299841 | 216115657 | 5657 | 07:43:00 | 00:00:00 | 1  | NULL  | 2017-11-28 | NULL  | 4   | NULL  | 2017-11-28 14:00:27 | NULL    | 2017-11-28 | 
 
+--------+-----------+-------+----------+----------+---------+----------+------------+------------+------------+-------------+---------------------+---------------------+-------------+

に見えるレンジエントリの日付はnullですが、in_date検索の提供？

Answer 1

あなたは言う必要 - 日付は、これらの日付の間にある - またはnull ...

SELECT * FROM `msattendance` 
    WHERE ((in_date between '2017-11-23' and '2017-11-28') 
      or in_date is null) 
     and reg_b = '5657' 

Answer 2

これは、何が必要です。

以下のクエリは、in_dateが存在しないか、指定された期間内のすべてのユーザーを返します。

SELECT * 
FROM `msattendance` 
WHERE (in_date IS NULL OR in_date >= '2017-11-23') 
AND in_date <= '2017-11-28'   
AND reg_b = '5657'