concat

I'm trying to concatenate a first middle maiden and last name fields and use that to update a single field which is named fullname For each user any combination of these 4 fields can be filled. From 0 to all 4. However I also need a single space between each name (not multiple spaces). UPDATE nameTable SET fullname = CONCAT(first, middle, maiden, last); MySQL has CONCAT_WS - concatenate with separator CONCAT_WS(' ', first, middle, maiden, last); http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_concat-ws As pointed out by andr below, make sure any concatenated fields

I'm trying to accomplish the following ridiculous task: I have a text file containing a set of fully qualified filesnames. I want to iterate through the file and append each line to a common variable, that can be passed to a command line tool. For example, the file might be: C:\dir\test.txt C:\WINDOWS\test2.txt C:\text3.txt and I'd like to assign them to some variable 'a' such that: a = "C:\dir\test.txt C:\WINDOWS\test2.txt C:\text2.txt" A secondary question is - what is a good batch file reference? I'm finding some stuff in the Windows material, and a lot of home-grown websites, but nothing

Nginx_concat_module 是淘宝开发的基于Nginx减少HTTP请求数量的扩展模块,主要是用于合并减少前端用户Request的HTTP请求的数量 下载完成之后需要重新编nginx 访问链接：www.xxx.cm/js/??1.js,2.js... 1.查看nginx配置 nginx -V 2.复制nginx配置 ，在上面的配置中添加 --add-module=/路径/nginx-http-concat 然后make && make install 3.修改配置文件nginx.conf location /js/ { # 打开concat 功能 concat on; # 允许concat最大的文件数 默认最大设置十个文件。 concat_max_files 10; # 只允许相同类型的文件 concat_unique on; # 允许内容的类型 (default: application/x-javascript, text/css) concat_types text/html; } 来源： oschina 链接： https://my.oschina.net/u/252023/blog/96562

Is there a function to concatenate elements of a list with a separator? For example: > foobar " " ["is","there","such","a","function","?"] ["is there such a function ?"] Thanks for any reply! Niklas B. Yes, there is : Prelude> import Data.List Prelude Data.List> intercalate " " ["is","there","such","a","function","?"] "is there such a function ?" intersperse is a bit more general: Prelude> import Data.List Prelude Data.List> concat (intersperse " " ["is","there","such","a","function","?"]) "is there such a function ?" Also, for the specific case where you want to join with a space character,

Can anyone check for me what's wrong with my code. I want it merge two csv file into one csv file. I hve tried to google and I still cant merge it, it will create new file but will show nothing inside. https://stackoverflow.com/a/16266144/7624469 a.csv ID User A1 Fi A2 Ki b.csv ID User A4 Fsdi A5 Kisd The output that I want will look like this combined.csv ID User A1 Fi A2 Ki A4 Fsdi A5 Kisd test.py import pandas, sys import pandas as pd a = pd.read_csv("C:/JIRA Excel File/a.csv") b = pd.read_csv("C:/JIRA Excel File/b.csv") merged = a.merge(b, on='ID') merged.to_csv('C:/JIRA Excel File/result

Is there a way to do something like this on MongoDB? select * from table where concat(field1, field2) = 'value' To clarify, I have an array of full names, but the documents have firstname and lastname separate, so I want to do something like select * from table where concat(firstname, lastname) in ([ARRAY OF NAMES]) You can only do it with aggregation framework, not with regular find. db.coll.aggregate({$project:{newField:{$concat:["$field1","$field2"]}}}, {$match:{newField:"value"}} ); Note that this will not be able to use any indexes, since there is no support for indexes on computed values