测试开发技术网站

### 1 报错类似如下
```bash
数据库错误: Error querying database.  Cause: java.sql.SQLSyntaxErrorException: Expression 39 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.ss.student_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
The error may exist in URL [jar:file:/usr/local/xxxxx.jar!/BOOT-INF/lib/summer-system-4.6.0.jar!/mapper/system/SuOrgProgramMapper.xml]
The error may involve com.ruoyi.system.mapper.SuOrgProgramMapper.selectSuOrgProgramList-Inline
The error occurred while setting parameters
SQL: select sop.*,so.org_name as orgName,sa.activity_name as activityName,sa.activity_name_en as activityNameEN,         ss.student_id as matchedStudentId,ss.name as matchedStudentName, su.login_name as email, su.real_name AS firstName, su.nickname as nickname         from su_org_program sop         inner join su_activity sa on sop.activity_id=sa.activity_id         inner join su_org so on so.org_id = sop.org_id         left JOIN sys_user su ON sop.main_teacher_id = su.sub         left join (select * from su_student_program where is_matched=1) ssp on ssp.org_program_id= sop.org_program_id         left JOIN su_student ss on ssp.student_id=ss.student_id          WHERE  sop.org_id = ?          GROUP BY sop.org_program_id
Cause: java.sql.SQLSyntaxErrorException: Expression 39 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.ss.student_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by\n; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: Expression 39 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.ss.student_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
```
### 2 解决办法

#### 2.1 查看全局sql模式
使用如下m命令

```bash
select @@global.sql_mode;
```
如下：

```bash
mysql> select @@global.sql_mode;
+-------------------------------------------------------------------------------------------------------------------------------------------+
| @@global.sql_mode                                                                                                                         |
+-------------------------------------------------------------------------------------------------------------------------------------------+
| ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+-------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

```

#### 2.2 设置全局sql模式
使用如下命令

```bash
SET GLOBAL sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
```
如下：
```bash
ysql> SET GLOBAL sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> 
```

#### 2.3 查看当前sql模式
使用如下命令

```bash
select @@sql_mode;
```
如下
```bash
mysql> select @@sql_mode;
+------------------------------------------------------------------------------------------------------------------------+
| @@sql_mode                                                                                                             |
+------------------------------------------------------------------------------------------------------------------------+
| STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql>
```

#### 2.4 设置当前sql模式
使用如下命令
```bash
set @@sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
```
如下：
```bash
mysql> set @@sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql>
```

### 3 永久生效的解决办法
#### 3.1 找到my.cnf文件
可以使用如下命令查找，一般在 /etc/下或者 /etc/mysql/ 目录下
```bash
find /etc/ -name my.cnf
```

#### 3.2 编辑my.cnf文件
```bash
vi /etc/mysql/my.cnf
```
然后增加以下内容：
```bash
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
```

#### 3.3 重启数据库服务
```bash
systemctl restart mysqld
```

测试开发技术网站

博客