https://msdn.microsoft.com/en-us/library/ms191491.aspx 方法一:Using SQL Server Management Studio To detach a database In SQL Server Management Studio Object Explorer, connect to the instance of the SQL Server Database Engine and then expand the instance…

Problem Sometimes there is a need to change the name of your database whether this is because the original name was based on some other project that is no longer relevant to the data stored in the database or maybe it was because you restored a datab…

SQL Server database administrators may frequently need in especially development and test environments  instead of the production environments to kill all the open connections to a  specific database in order to process SQL Server maintenance task ov…

2017-11-01 09:49:44.35 spid166 SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Object Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations. 2017-11-01 09:49:47.85 spid166 SQL Server…

2016-04-19更新:本文代码可能有些问题,请移步 http://zhengbomo.github.io/2016-04-18/sqlcipher-start/ 查看 sqlite应用几乎在所有的App都能看到,虽然我们的数据存储在沙盒里面,一般情况下无法拿到,但是iOS管理软件(如:iFunBox)可以读取到应用程序沙盒里面的文件,为了提高数据的安全性,我们需要考虑对数据库进行加密 数据库加密一般有两种方式 1.对所有数据进行加密 2.对数据库文件加密 处于客户端性能的考虑,通常我们对数据…

关于SQLite,SQLCipher和FMDB SQLite是一个轻量的.跨平台的.开源的数据库引擎,它的在读写效率.消耗总量.延迟时间和整体简单性上具有的优越性,使其成为移动平台数据库的最佳解决方案(如iOS.Android).然而免费版的SQLite有一个致命缺点:不支持加密.这就导致存储在SQLite中的数据可以被任何人用任何文本编辑器查看到. 如果我们想要使得自己的数据库加密,解决方案就是使用另一款开源的加密数据库SQLCipher,SQLCipher使用256-bit AES加密,由于…

http://www.codeproject.com/Articles/746191/SQLite-Helper-Csharp This small class (SQLiteHelper.cs) is built on top of System.Data.SQLite.DLL. A reference of this DLL must be added into your projects. Download: https://system.data.sqlite.org List of S…

/** * 对数据库加密 * * @param path path description * * @return return value description */ + (BOOL)encryptDatabase:(NSString *)path; /** * 对数据库解密 * * @param path path description * * @return return value description */ + (BOOL)unEncryptDatabase:(NSString…

由于sqlite对多进程操作支持效果不太理想,在项目中,为了避免频繁读写 文件数据库带来的性能损耗,我们可以采用操作sqlite内存数据库,并将内存数据库定时同步到文件数据库中的方法. 实现思路如下: 1.创建文件数据库: 2.创建内存数据库(文件数据库.内存数据库的内幕表结构需要一致): 3.在内存数据库中attach文件数据库,这样可以保证文件数据库中的内容在内存数据库中可见: 4.对于insert.select操作,在内存数据库中完成,对于delete.update操作,需要同时访问内存.…

1.The target principal name is incorrect.  Cannot generate SSPI context. 检查IIS的profile,可能是密码错误 2.The ORDER BY clause is invalid in views, inline functions, derived tables, and subqueries, unless TOP is also specified. Generally, It's not a good idea…