我们最常用的DBD::mysql模块,我发现是难住很多人的地方.因为安装老是失败,下面我介绍一下解决方法,比如我使用cpanm安装,有时就出/home/nue2501j/work/DBD-mysql-4.010/blib/arch/auto/DBD/mysql/mysql.so:undefinedsymbol:DBIc_TRACE_LEVELat/usr/lib/perl5/5
我们最常用的 DBD::mysql 模块,我发现是难住很多人的地方.因为安装老是失败,下面我介绍一下解决方法,比如我使用 cpanm 安装,有时就出 /home/nue2501j/work/DBD-mysql-4.010/blib/arch/auto/DBD/mysql/mysql.so: undefined symbol: DBIc_TRACE_LEVEL at /usr/lib/perl5/5.8.5/i386-linux-thread-multi/DynaLoader.pm line 230.如下
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# cpanm DBD::mysql 出错 # Tried to use 'DBD::mysql'. # Error: Can't load '/home/nue2501j/work/DBD-mysql-4.010/blib/arch/auto/DBD/mysql/mysql.so' for module DBD::mysql: /home/nue2501j/work/DBD-mysql-4.010/blib/arch/auto/DBD/mysql/mysql.so: undefined symbol: DBIc_TRACE_LEVEL at /usr/lib/perl5/5.8.5/i386-linux-thread-multi/DynaLoader.pm line 230. # at (eval 4) line 2 # Compilation failed in require at (eval 4) line 2. # BEGIN failed--compilation aborted at (eval 4) line 2. FAILED--Further testing stopped: Unable to load DBD::mysql make: *** [test_dynamic] Error 9
解决方法 $ sudo perl -MCPAN -e shell cpan> install Bundle::DBD::mysql /usr/bin/make -- OK /usr/bin/make test -- OK /usr/bin/make install -- OK cpan> install DBD::mysql DBD::mysql is up to date.

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架构原理的相关内容,MySQL Server架构自顶向下大致可以分网络连接层、服务层、存储引擎层和系统文件层,下面一起来看一下,希望对大家有帮助。

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') ”。

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。

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)..”。

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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