alias

SQLite table aliases effecting the performance of queries

由 不打扰是莪最后的温柔 提交于 2019-12-06 11:29:18
How does SQLite internally treats the alias? Does creating a table name alias internally creates a copy of the same table or does it just refers to the same table without creating a copy? When I create multiple aliases of the same table in my code, performance of the query is severely hit! In my case, I have one table, call it MainTable with namely 2 columns, name and value. I want to select multiple values in one row as different columns. for example Name: a,b,c,d,e,f Value: p,q,r,s,t,u such that a corresponds to p and so on. I want to select values for names a,b,c and d in one row => p,q,r,s

How I can make alias called when it's called by a variable

由 亡梦爱人 提交于 2019-12-06 10:52:50
问题 I added an alias: $ alias anyalias="echo kallel" If I execute: $ anyalias kallel it executes the echo command without any problem. Now, if I define a variable in this way: $ var="anyalias" and then execute with this way: $ $var -ash: anyalias: not found Then I got a shell error. How I can make $var running the command defined in the anyalias alias? I m not looking to change the way of calling $var . But I m looking for a way of changing the definition of the alias or export it. 回答1: Instead

How to get domain alias using System.DirectoryServices.ActiveDirectory.Domain class

由 落爺英雄遲暮 提交于 2019-12-06 08:49:20
问题 We have a domain with full name, e.g. long-domainname.com ; this domain name is replaced with alias short . this alias can be retrieved using netapi32.dll , like this: [DllImport("Netapi32.dll")] static extern int NetApiBufferFree(IntPtr Buffer); // Returns the domain name the computer is joined to, or "" if not joined. public static string GetJoinedDomain() { int result = 0; string domain = null; IntPtr pDomain = IntPtr.Zero; NetJoinStatus status = NetJoinStatus.NetSetupUnknownStatus; try {

Creating a 'git log' alias with formatting

由 血红的双手。 提交于 2019-12-06 08:16:55
I have a bunch of git aliases already set up in my .bash_profile that work correctly: alias gst="git status" alias gl="git pull" alias gp="git push" alias gd="git diff | mate" alias gc="git commit -v" alias gca="git commit -v -a" alias gb="git branch" alias gba="git branch -a" I'm trying to add an alias for the following command, but keep running into an error: git log --all --pretty=format:'%h %cd %s (%an)' --since='7 days ago' What I'd like to do, is be able to type: glog 'some amount of time' So, being new at both aliases and git, I figured this would work: alias glog="git log --all -

alias in cshell with grave accents, apostrophes and more

由 落花浮王杯 提交于 2019-12-06 08:11:31
问题 I came across a weird behavior in the c-shell: when writing the following line, i get exactly the behavior I expect: ls -l | grep $USER | somescript `awk -F' ' '{print $1}'` meaning - it will search all items owned by me and activate 'somescript' with their first field as argument. however, when I try aliasing the same line, it jams my shell (or hands out error massages if i separate the braces from the apostrophe: alias doit 'ls -l | grep $USER | somescript `awk -F' ' '{print $1}'`' will

nginx虚拟目录(alias与root的区别)

由 Deadly 提交于 2019-12-06 07:17:29
今天配置awstats，awstats创建出的文件目录在/home/awstats下，在nginx中加入配置后狂报404，发现还是忽略了root和alias的区别，特将修改配置记录如下： 1.失败： server { server_name test.com; charset utf-8,GB2312; index index.html; location / { root html; access_log logs/access.log main; } location ~ ^/awstats/ { root /home/awstats/; index index.html; access_log off; error_log off; charset gb2312; } } 2.失败: server { server_name test.com; charset utf-8,GB2312; index index.html; location / { root html; access_log logs/access.log main; } location ~ ^/awstats/ { alias /home/; index index.html; access_log off; error_log off; charset gb2312; } } 3. 成功 server

Why can't my As400 select from a newly created member alias?

由 雨燕双飞 提交于 2019-12-06 05:00:38
问题 I have set up the code as described in this question. Creating an alias works, as well as dropping it. For members that I have created myself, this is working correctly, but for existing members I get the following error when selecting from the alias: SQL State: 42704 Vendor Code: -204 Message: [SQL0204] MyMemberName in MyLib type *FILE not found. Cause . . . . . : MyMemberName in TPLWHS type *FILE was not found. If the member name is *ALL, the table is not partitioned. If this is an ALTER

How to use aliases in math operators in SQL?

由 末鹿安然 提交于 2019-12-06 02:51:23
问题 First of all, please correct me if "alias" is the wrong word. I am talkin about renaming the column with AS operator. So I'm trying calculate an average like this : SELECT users.username AS player_name, COUNT(*) AS total_games, SUM(games.points) AS total_points, (total_points / total_games) AS average_points FROM games, INNER JOIN users ON games.player_id = users.id GROUP BY games.player_id (the query might be wrong, its just a quick example) in this query, the line (total_points / total

三、kubectl命令补全

由 …衆ロ難τιáo~ 提交于 2019-12-06 02:16:25
[root@k8s-master01 k8s]# yum install -y bash-completion [root@k8s-master01 k8s]# source /usr/share/bash-completion/bash_completion # source <(kubectl completion bash) 就可以完成补全了。 可以将 source <(kubectl completion bash) 命令 写入 $HOME/.bashrc中. [root@k8s-master01 k8s]# cat $HOME/.bashrc # .bashrc # User specific aliases and functions alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi source <(kubectl completion bash) [root@k8s-master01 k8s]# source $HOME/.bashrc 来源： https://www.cnblogs.com/xw115428/p/11956568.html

What are 'aliased' stream buffers?

由 ε祈祈猫儿з 提交于 2019-12-05 23:18:54
What are 'aliased stream buffers`? I encountered the term in a comment on an answer of mine. James Kanze I've never heard the term before, but in the thread you cite, the person who used it also gave an example: two streams which use the same streambuf. Of course, just because two streams don't use the same streambuf, doesn't mean that data written to them doesn't ultimately end up in the same place; that they don't alias the same sink, if that is what is meant. There are filtering streambuf's, which forward the actual sinking and sourcing to another streambuf, and on most systems, it's
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