大约有 3,630 项符合查询结果(耗时:0.0101秒) [XML]

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How to create user for a db in postgresql? [closed]

I have installed PostgreSQL 8.4 on my CentOS server and connected to root user from shell and accessing the PostgreSQL shell. ...
https://www.tsingfun.com/ilife/relax/715.html 

千万别惹程序员 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术

...些精细的调优工作,明显不行。这和Ruby很像。 PHP没有MySQL,明显是被幽默了一把。不过最近对PHP的批评越来越多,不过,facebook的PHP的引擎HiPo已经很牛B了。 Perl是一本日本武士刀,是忍者玩的语言。 VB,就是一个玩具。你见...
https://www.tsingfun.com/it/cpp/1335.html 

半个汉字的校验与处理(C++) - C/C++ - 清泛网 - 专注C/C++及内核技术

...串的后续处理,会带来一定的麻烦,比如在xml文档、或者SQL语句中,如果存在半个汉字,就会导致xml解析失败,或者sql执行错误的异常。为了解决这个问题,有必要找到并删除半个汉字,或者存放的时候,即便截断,也不产生新...
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Oracle 分组后取每组第一条数据 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...组后取每组第一条数据Oracle 分组后取每组第一条数据的SQL如下,亲测有效:SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T field1, T Oracle 分组后取每组第一条数据的SQL如下,亲测有效: SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION ...
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Linq 多字段排序,二次排序 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );类似SQL:select * from t1 order by f1 d...Linq:ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 ); 类似SQL:select * from t1 order by f1 desc ,f2 asc 这种写法里 OrderBy、ThenBy 是升序的,Ord...
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SQLite 拓展查询数据表,带条件过滤 - App应用开发 - 清泛IT社区,为创新赋能!

SQLite 拓展导入,新建库、表等详见文档:https://www.fun123.cn/reference/extensions/SQLite.html 本文详细介绍一下,SQLite 的查询功能,以及带where条件的查询功能。 空表的情况下,先插入6条数据: 引入 TableView 拓展,用户展示查...
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- App Inventor 2 离线版 - 清泛IT社区,为创新赋能!

数据存储 抽屉中的 微数据库 组件。键值存储,用法很简单,看下文档就行了。 如果需要 sql  数据库,使用 SQLite 拓展:拓展,拓展市场,搜索 sql
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App Inventor 2 数据库方案全览:从本地存储到云端服务 - App应用开发 - 清...

...本地,App卸载就没了,且不同设备之间不能同步。 2. SQLite - 类型:拓展组件 - 数据方案:本地存储(可导入导出库文件) - 是否支持数据变更事件:否 - 特点:用法稍复杂,支持标准SQL,支持事务 - 业务支撑级别:中型...
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NOT using repository pattern, use the ORM as is (EF)

...stead of constrained to a consistent location creates the EF equivalent of SQL calls in codebehind pages. Every LINQ query is a potential maintenance point in an application, and the more there are (and the more widespread they are), the higher the maintenance costs and risks. Imagine adding a 'de...
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How to edit multi-gigabyte text files? Vim doesn't work =( [closed]

... Great tip. I had a 13GB (152.000.000 lines) sql-file, and just using "split -l 1000000" then editing the one million line files where I wanted with vim worked great. Took 10 minutes just to split them. (I tried to open the original file with vim and that worked, but it...