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Replace Default Null Values Returned From Left Outer Join
...t.id,
COALESCE(d.field, 'default')
FROM
test t
LEFT JOIN
detail d ON t.id = d.item
Also, you can use multiple columns to check their NULL by COALESCE function.
For example:
mysql> SELECT COALESCE(NULL, 1, NULL);
-> 1
mysql> SELECT COALESCE(0, 1, NULL);
-&g...
How to edit one specific row in Microsoft SQL Server Management Studio 2008?
...I'm using Server Management Studio 11.0.x (SQL Server 2012). As ѺȐeallү details very well with steps and screenshots, the menu location has been moved to: Query Designer --> Pane --> SQL
– Shawn
Jul 3 '14 at 17:34
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How to add ID property to Html.BeginForm() in asp.net mvc?
...m.Web.Mvc.Html ( in System.Web.Mvc.dll ) the begin form is defined like:- Details
BeginForm ( this HtmlHelper htmlHelper, string actionName, string
controllerName, object routeValues, FormMethod method, object
htmlAttributes)
Means you should use like this :
Html.BeginForm( strin...
Android Task Affinity Explanation
...
You can find all cases (and some times edge cases) in this detailed presentation
Please, refer Manipulating Android tasks and back stack
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Search for selection in vim
...l copy the text you're searching for and paste it into a search.
For more details type :help q/
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What is the best way to use a HashMap in C++?
... uses red black trees for ordered maps. But this is just an implementation detail. In an unordered map insert and access is in O(1). It is just another name for a hashtable.
An example with (ordered) std::map:
#include <map>
#include <iostream>
#include <cassert>
int main(int ar...
how to permit an array with strong parameters
...et category_ids to be an array
params.require(:question).permit(:question_details, :question_content, :user_id, :accepted_answer_id, :province_id, :city, :category_ids => [])
Works perfectly now!
(IMPORTANT: As @Lenart notes in the comments, the array declarations must be at the end of the at...
Xcode 5: Code signing entitlement errors
...steps:
Xcode Preferences
Accounts tab
Select your Apple ID
Hit the View Details button in the Apple ID detail panel
Hit the Refresh button in the lower left corner
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How do I view the list of functions a Linux shared library is exporting?
...can use also readelf (manual). It is similar to objdump but goes more into detail. See this for the difference explanation.
$ readelf -sW /lib/liblzma.so.5 |head -n10
Symbol table '.dynsym' contains 128 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE ...
Linux find file names with given string
...edb command first to prepare the search database for the first time.
More detail here: https://medium.com/@thucnc/the-fastest-way-to-find-files-by-filename-mlocate-locate-commands-55bf40b297ab
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