Question

我有以下纯粹的mysql问题。一些查询切断了第一个字母。从未见过这个：

mysql> select distinct connect_town from ean_publiek where special_connection='1';

+--------------------------+
| connect_town             |
+--------------------------+
| ANDVOORT               2 |
| 'T LOO OLDEBROEK       8 |
| OUDSEND                8 |
+--------------------------+
3 rows in set (0.00 sec)`

现在ANDVOORT应该是ZANDVOORT，而OUDSEND应该是WOUDSEND，从

可以看出

mysql> select * from ean_publiek where Connect_Postcode='2042JE';

+--------------------+--------------------+---------------------+------------------+--------------+------------------+----------------+---------------+------------+-------------------------------+
| Connect_EAN        | Connect_Streetname | Connect_HouseNumber | Connect_HouseRef | Connect_Town | Connect_Postcode | Market_Segment | NetOP_EAN     | NetOP_Name | Indication_Special_Connection |

| 871689294901618151 | Kerkstraat         |                   2 | E                | ZANDVOORT    | 2042JE           | 27             | 8716892720002 | Stedin NB  | 0
           |
| 871689294901618168 | Kerkstraat         |                   2 | F                | ZANDVOORT    | 2042JE           | 27             | 8716892720002 | Stedin NB  | 0
           |`

mysql来自windows 7下的wamp安装，其about屏幕显示以下详细信息：

WampServer Version 3.0.6 64bit Created by Romain Bourdon (2005) Maintainer / Upgrade to 2.5 by Herve Leclerc Upgrade to 3 by Otomatic (wampserver@otomatic.net) Multi styles for homepage by Jojaba Installer by Inno Setup: http://www.jrsoftware.org/isinfo.php Forum Wampserver: http://forum.wampserver.com/index.php
______________________ Versions used ______________________ Apache 2.4.23 - PHP 5.6.25 - MySQL 5.7.14 PHP 5.6.25 for CLI (Command-Line Interface)

该表已经从（非常大的）dmp文件创建并加载。

mysql> desc ean_publiek;
+-------------------------------+-----------------+------+-----+---------+-------+
| Field                         | Type            | Null | Key | Default | Extra |
+-------------------------------+-----------------+------+-----+---------+-------+
| Connect_EAN                   | char(18)        | NO   | MUL | NULL    |       |
| Connect_Streetname            | char(24)        | YES  | MUL | NULL    |       |
| Connect_HouseNumber           | int(5) unsigned | YES  | MUL | NULL    |       |
| Connect_HouseRef              | char(6)         | YES  | MUL | NULL    |       |
| Connect_Town                  | char(24)        | YES  | MUL | NULL    |       |
| Connect_Postcode              | char(6)         | YES  | MUL | NULL    |       |
| Market_Segment                | char(3)         | YES  | MUL | NULL    |       |
| NetOP_EAN                     | char(13)        | YES  | MUL | NULL    |       |
| NetOP_Name                    | char(24)        | YES  | MUL | NULL    |       |
| Indication_Special_Connection | char(1)         | YES  | MUL | NULL    |       |
+-------------------------------+-----------------+------+-----+---------+-------+
10 rows in set (0.00 sec)

问题当然是，我在哪里可以设置什么，以便选择不同的查询显示正确的结果？我在这个论坛上找到了一些关于阿拉伯语文本的参考，但这是荷兰语，而不是阿拉伯语。其他引用是关于缺少行的，这个问题与丢失的第一个字母有关，而不是第一行。

提前致谢！

@EDIT：试图回归原因，这不是关于明显的：没有'明显'同样的错误结果：

    mysql> select connect_town from ean_publiek where indication_special_connection='1';
+--------------------------+
| connect_town             |
+--------------------------+
| ANDVOORT               2 |
| 'T LOO OLDEBROEK       8 |
| 'T LOO OLDEBROEK       8 |
| OUDSEND                8 |
| OUDSEND                8 |
+--------------------------+
5 rows in set (0.00 sec)

其他尝试：问题似乎不是由选择的“特定字段”引起的，并且问题发生在城市列以上，在荷兰Connect_Postcode下面的示例中，总是形式为nnnnAB（4位数2）所有内容似乎都发生了变化，特别是“Connect_HouseRef”列似乎“窃取”了它右边列中的第一个字符，依此类推。

mysql> SELECT * from ean_publiek where Indication_special_connection='1';

| Connect_EAN        | Connect_Streetname | Connect_HouseNumber | Connect_HouseRef | Connect_Town             | Connect_Postcode | Market_Segment | NetOP_EAN     | NetOP_Name | Indication_Special_Connection |

| 871689294901618281 | Kerkstraat         |                  10 | BC   Z           | ANDVOORT               2 | 042JE2           | 7 8            | 716892720002S | tedin NB           0 | 1                             |
| 871687110001572501 | Vierschotenweg     |                  28 | B                | 'T LOO OLDEBROEK       8 | 095PR2           | 3 8            | 716871000002L | iander NB           0 | 1                             |
| 871687140022788551 | Vierschotenweg     |                  28 | B                | 'T LOO OLDEBROEK       8 | 095PR2           | 7 8            | 716871000002L | iander NB           0 | 1                             |
| 871687120000013011 | Iewal              |                  16 |  93 4W           | OUDSEND                8 | 551PT2           | 3 8            | 716871000002L | iander NB           0 | 1                             |
| 871687120000238476 | Midstrjitte        |                  30 |  93 4W           | OUDSEND                8 | 551PJ2           | 3 8            | 716871000002L | iander NB           0 | 1                             |
5 rows in set (0.02 sec)

mysql> select distinct connect_town from ean_publiek where connect_town like '%andvoort';
+-----------------+
| connect_town    |
+-----------------+
| EEXTERZANDVOORT |
| ZANDVOORT       |
+-----------------+
2 rows in set (24.16 sec)


mysql> select distinct connect_town from ean_publiek where connect_town = 'zandvoort';
+--------------+
| connect_town |
+--------------+
| ZANDVOORT    |
+--------------+
1 row in set (0.00 sec)


mysql> select distinct connect_town from ean_publiek where connect_town like '%LOO OLDEBROEK';
+------------------+
| connect_town     |
+------------------+
| 'T LOO OLDEBROEK |
+------------------+
1 row in set (0.09 sec)

我不是在做这件事，而且这不是一个家庭学习项目。这是一个工作项目。我怀疑这是我必须设置的一些奇怪的设置，它不表示不可打印的字符，它是从通过从测试服务器导出创建的转储文件的导入。

Answer 1

通过在my.ini中使用更高的内存设置解决（过去称为my.cnf）。 MySql没有抱怨，错误日志中没有一行，这是一种冒犯。到目前为止，我只是幸运。所以，我是愚蠢的，因为我确实假设（那个wamp会神奇地总是起作用），并且假设是错误的，它很懒，我很抱歉。

Mysql Select显示结果切掉第一个字母

1 个答案: