selectconcat('droptable',table_name,';')fromTABLESwheretable_schema='数据库名称';selectconcat('truncate',table_name,';')fromTABLESwheretable_schema='数据库名称';...

2年前使用的ttserver,性能很高，支持分布式，但稳定性不足，当存储容量达到亿级的时间经常会出现无法插入的情况，而且不知道是什么原因造成的错误，重启后也无济于事，只好重启开新库。单库写入性能2000/sec，当数据量增大到亿级的时候，只是轻微的降低。双库写入性能 2000/sec，当数据量增大到亿级的时候...

souhu yum服务器CentOS-Base.repo将$releasever替换为操作系统版本号 #CentOS-Base.repo##ThemirrorsystemusestheconnectingIPaddressoftheclientandthe#updatestatusofeachmir...

出现这种情况了，是mybatis-generator生成mapper.xml一遍之后。再修改数据库，然后再生成，它不会删去之前的，只是增加，就会出现两段相同的代码。<?xmlversion="1.0"encoding="UTF-8"?><!DOCTYPEmapperPUBLIC"-//mybatis....

mybatis出错了，正在找原因。XMLfragmentsparsedfrompreviousmappersdoesnotcontainvalueforcom.miniprogram.meirong.user.dao.UserMapper.Blob_Column_List嗯，这个报错，要看仔细，之后去分析，不能怕，一目...

https://stackoverflow.com/questions/475421/base64-encode-a-pdf-in-cUseFile.ReadAllBytestoloadthePDFfile,andthenencodethebytearrayasnormalusingConvert.ToBase64St...

https://docs.microsoft.com/en-us/dotnet/api/system.serviceprocess.servicebase.onstart?view=netframework-4.7.1#System_ServiceProcess_ServiceBase_OnStart_System_S...

https://stackoverflow.com/questions/2737092/how-to-execute-page-load-in-pages-base-classWefacedthesimilarproblem,Allyouneedtodoisjustregisterthehandlerinthecons...

https://docs.microsoft.com/en-us/sql/relational-databases/performance/start-and-use-the-database-engine-tuning-advisor?view=sql-server-2017 ...

base64的原理，http://www.cnblogs.com/diligenceday/p/6002382.htmlhttp://www.cnblogs.com/chengxiaohui/articles/3951129.htmlbase64的码表只有64个字符，如果要表达64个字符的话，使用6的bit即可完全表示...

在winform中的OnPaint事件中，AppDomain.CurrentDomain.BaseDirectory得到的是下面这个路径C:ProgramFiles(x86)MicrosoftVisualStudio2017ProfessionalCommon7IDE Application.Executab...

http://bitoftech.net/2014/06/01/token-based-authentication-asp-net-web-api-2-owin-asp-net-identity/...

Baselinesanexistingdatabase,excludingallmigrationsuptoandincludingbaselineVersion.BaselineisforintroducingFlywaytoexistingdatabasesbybaseliningthemataspecificve...

https://www.sherweb.com/blog/how-to-set-up-database-mail-for-sql-server-job-failures/ ...

https://www.codeproject.com/Articles/36836/Forms-Authentication-and-Role-based-AuthorizationSad,buttrue,“FormsauthenticationinASP.NETdoesnotdirectlysuppor...