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LINQ to Entities case sensitive comparison

... LINQ To Entities which is ultimately convert your Lambda expressions into SQL statements. That means the case sensitivity is at the mercy of your SQL Server which by default has SQL_Latin1_General_CP1_CI_AS Collation and that is NOT case sensitive. Using ObjectQuery.ToTraceString to see the generat...
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Is there a way to access the “previous row” value in a SELECT statement?

...n between two lines of a table. Is there any way I can do this directly in SQL? I'm using Microsoft SQL Server 2008. 7 Answ...
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How should you build your database from source control?

...ER scripts: 1 BIG script (or directory of scripts named liked 001_AlterXXX.sql, so that running them in natural sort order will upgrade from version A to B) Which types of objects shouldn't be version controlled? Sequences? Grants? User Accounts? see 2. If your users/roles (or technical user nam...
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C++ ADO Excel中RecordSet.Open打开记录的两个参数adOpenKeyset、adLockBat...

...同。当只需要在 Recordset 中进行一个传递时,用它可提性能。 1 adOpenKeyset 使用键集游标。尽管从您的 Recordset 不能访问其他用户删除的记录,但除无法查看其他用户添加的记录外,它和动态游标相似。其他用...
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socket网络编程中read与recv区别 - C/C++ - 清泛网 - 专注C/C++及内核技术

...下recv (使用了MSG_WAITALL)还是可以读完buff_size,所以相应的性能会比直接read 进行循环读要好一些。 2、read 与 recv函数调用 read(sockfd, buff, buff_size); write(sockfd, buff, buff_size); recv(sockfd, buff, buff_size,MSG_WAITAL...
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灾难恢复RTO 与 RPO - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...衡量指标,最终目的是要能够很好地检验灾备系统的实用性能,否则就失去建立灾备的意义了。而灾备最核心的作用就是确保灾难发生后业务能够连续运行,交易中的数据完整保存,丢失越少越好。因此业务层面的恢复,企业要...
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响应式布局的三大要点 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...辑。否则页面实现得太过复杂,也会影响整体体验和页面性能。 源自:http://heyuchan.com/?p=803 响应式 布局
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HTTPKeepAlive,开启还是关闭 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...尔访问一次,此时的KeepAlive连鸡肋都不如,为了服务器的性能,关闭它吧! … HTTPKeepAlive,开启还是关闭,大家不妨结合自己的客观情况重新思考一下。 HTTPKeepAlive
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内网时间同步问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...器,但您能通过提供至少三个或四个服务器以获得更好的性能。 2. 如果一个类似 xntpd 守护程序的 NTP 服务器守护程序正在同一主机上运行,命令将拒绝 ntpdate 设置日期。 3. 你必须有 root 权限才能在主机上运行这个命...
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领域驱动设计系列(二):领域Model? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...换,转入转出。当然我们可以用AutoMapper来但是AutoMapper的性能实在难以恭维,大家可以在网上搜索AutoMapper performance. 领域模型成了一个单纯的DTO了。 领域模型 首先我们要看领域,就是我们尽量把业务聚合到一个领域里,比如...