寻找错误日志,日志默认在: C:\ProgramData\MySQL\MySQL Server 5.6\data\LI-PC.err 错误日志如下: InnoDB: Error: could not open single-table tablespace file .\mysql\innodb_index_stats.ibdInnoDB: We do not continue the crash recovery, because
寻找错误日志,日志默认在:
C:\ProgramData\MySQL\MySQL Server 5.6\data\LI-PC.err
错误日志如下:
InnoDB: Error: could not open single-table tablespace file .\mysql\innodb_index_stats.ibd InnoDB: We do not continue the crash recovery, because the table may become InnoDB: corrupt if we cannot apply the log records in the InnoDB log to it. InnoDB: To fix the problem and start mysqld: InnoDB: 1) If there is a permission problem in the file and mysqld cannot InnoDB: open the file, you should modify the permissions. InnoDB: 2) If the table is not needed, or you can restore it from a backup, InnoDB: then you can remove the .ibd file, and InnoDB will do a normal InnoDB: crash recovery and ignore that table. InnoDB: 3) If the file system or the disk is broken, and you cannot remove InnoDB: the .ibd file, you can set innodb_force_recovery > 0 in my.cnf InnoDB: and force InnoDB to continue crash recovery here. 140424 9:34:06 [Note] Plugin 'FEDERATED' is disabled. 140424 9:34:06 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator. 140424 9:34:06 InnoDB: The InnoDB memory heap is disabled 140424 9:34:06 InnoDB: Mutexes and rw_locks use Windows interlocked functions 140424 9:34:06 InnoDB: Compressed tables use zlib 1.2.3 140424 9:34:06 InnoDB: CPU does not support crc32 instructions 140424 9:34:06 InnoDB: Initializing buffer pool, size = 49.0M 140424 9:34:06 InnoDB: Completed initialization of buffer pool 140424 9:34:06 InnoDB: highest supported file format is Barracuda. InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 140424 9:34:06 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files... 140424 9:34:06 [ERROR] InnoDB: InnoDB: Error: Attempt to open a tablespace previously opened. Previous tablespace hibernate/teacher uses space ID: 2 at filepath: .\hibernate\teacher.ibd Cannot open tablespace mysql/innodb_index_stats which uses space ID: 2 at filepath: .\mysql\innodb_index_stats.ibd InnoDB: Error: could not open single-table tablespace file .\mysql\innodb_index_stats.ibd InnoDB: We do not continue the crash recovery, because the table may become InnoDB: corrupt if we cannot apply the log records in the InnoDB log to it. InnoDB: To fix the problem and start mysqld: InnoDB: 1) If there is a permission problem in the file and mysqld cannot InnoDB: open the file, you should modify the permissions. InnoDB: 2) If the table is not needed, or you can restore it from a backup, InnoDB: then you can remove the .ibd file, and InnoDB will do a normal InnoDB: crash recovery and ignore that table. InnoDB: 3) If the file system or the disk is broken, and you cannot remove InnoDB: the .ibd file, you can set innodb_force_recovery > 0 in my.cnf InnoDB: and force InnoDB to continue crash recovery here.
解决方案:仅从上述信息看,是innodb 的数据文件损坏,在我安装Mysql的数据目录:C:\ProgramData\MySQL\MySQL Server 5.6\data下,一般来说,直接删除ibdata1, ib_logfile0, .. 等innodb的文件,让MYSQL自动重建即可。

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在mysql中,可以利用char()和REPLACE()函数来替换换行符;REPLACE()函数可以用新字符串替换列中的换行符,而换行符可使用“char(13)”来表示,语法为“replace(字段名,char(13),'新字符串') ”。

方法:1、利用right函数,语法为“update 表名 set 指定字段 = right(指定字段, length(指定字段)-1)...”;2、利用substring函数,语法为“select substring(指定字段,2)..”。

mysql的msi与zip版本的区别:1、zip包含的安装程序是一种主动安装,而msi包含的是被installer所用的安装文件以提交请求的方式安装;2、zip是一种数据压缩和文档存储的文件格式,msi是微软格式的安装包。

转换方法:1、利用cast函数,语法“select * from 表名 order by cast(字段名 as SIGNED)”;2、利用“select * from 表名 order by CONVERT(字段名,SIGNED)”语句。

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了关于MySQL复制技术的相关问题,包括了异步复制、半同步复制等等内容,下面一起来看一下,希望对大家有帮助。

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了mysql高级篇的一些问题,包括了索引是什么、索引底层实现等等问题,下面一起来看一下,希望对大家有帮助。

在mysql中,可以利用REGEXP运算符判断数据是否是数字类型,语法为“String REGEXP '[^0-9.]'”;该运算符是正则表达式的缩写,若数据字符中含有数字时,返回的结果是true,反之返回的结果是false。


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