偶然发现,Spring Boot集成jpa编写实体类的时候,默认使用的命名策略是下划线分隔的字段命名. Spring Boot版本:1.5.4.release 数据表: id int, userName varchar(50) 那么如下的映射: @Data @Entity @Table(name="t_users") @NoArgsConstructor @AllArgsConstructor @Accessors(chain=true) public class User { @Id
安装了mysql5.7,用group by 查询时抛出如下异常: Expression # of SELECT list is not in GROUP BY clause and contains nonaggregated column 'userinfo.t_long.user_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode
出现问题: Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: In aggregated query without GROUP BY,expression #2 of SELECT list contains nonaggregated column 'pay.t.type'; this is incompatible with sql_mode=only_fu
报错如下:[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=on
执行update语句,出现问题: 问题描述: You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Editor and reconnect. 问题描述里已经给了解决方法,对SQL Editor进行设置,并且重新连接. 问题
由于之前在自己电脑上搭建了mysql 5.6的数据库,但是在服务器上搭建的是mysql 5.7的环境,在运行过程中出现了如下错误: Data truncation: Out of range value for column 'quanity' at row 1. 解决问题 问题索源 由于安装的时候没有将STRICT_TRANS_TABLES关闭导致的 排查问题 show variables like "sql_mode"; 发现其中有STRICT_TRANS_TABLES 解决问题
#前言: 最近频繁在mysql权限控制这里栽跟斗,在翻阅了一些资料之后,简单地翻译一下官网关于flush privileges的描述,抛砖引玉. #翻译正文: If the mysqld server is started without the -skip-grant-tables option, it reads all grant table contents into memory during its startup sequence. The in-memory tables b
安装了mysql5.7,用group by 查询时抛出如下异常: Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'userinfo.t_long.user_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mod
