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How do I get SUM function in MySQL to return '0' if no values are found?
...table
WHERE ...
To see it in action, please see this sql fiddle: http://www.sqlfiddle.com/#!2/d1542/3/0
More Information:
Given three tables (one with all numbers, one with all nulls, and one with a mixture):
SQL Fiddle
MySQL 5.5.32 Schema Setup:
CREATE TABLE foo
(
id INT NOT NULL AUT...
How to pass multiple parameters in a querystring
...n separators in addition to ampersand separators[6] to allow application/x-www-form-urlencoded query strings in URLs within HTML documents without having to entity escape ampersands.
Technically, the form content is only encoded as a query string when the form submission method is GET. The same enco...
What is the difference between a pseudo-class and a pseudo-element in CSS?
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answered Nov 9 '11 at 19:04
motoxer4533motoxer4533
2,6381919 silver badges3434 bronze badges
...
Alarm 闹钟扩展 · App Inventor 2 中文网
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版本
修改内容
1.0 (2021-04-26)
初始版本
2.0 (2021-05-15)
当包名更改时，ScreenToOpen 在Kodular上无法工作
2.1 (2021-06-12)
- AlarmIntent 中的 FlagNewTask 属性未正确设置。从A...
Finding quaternion representing the rotation from one vector to another
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answered Jul 23 '09 at 14:04
Polaris878Polaris878
31.6k3535 gold badges105105 silver badges139139 bronze badges
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Using npm behind corporate proxy .pac
... bash!
– Alex Punnen
Jun 7 '17 at 7:04
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What is the difference between association, aggregation and composition?
...a Professor can work for more than one Department.
– www.admiraalit.nl
Jul 17 '19 at 13:26
@www.admiraalit.nl AFAIK sh...
How to unit test a Node.js module that requires other modules and how to mock the global require fun
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answered Apr 30 '13 at 20:04
Elliot FosterElliot Foster
1,59411 gold badge1111 silver badges1010 bronze badges
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What jsf component can render a div tag?
...JSF 2.2 it's possible to use passthrough elements:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:jsf="http://xmlns.jcp.org/jsf">
...
<div jsf:id="id1" />
...
</html>
The requirement is to have at least one attribute in the element using jsf namespace.
...
LINQ To Entities does not recognize the method Last. Really?
...me).AsEnumerable()
.Select(p => p.FirstOrDefault());
Ref:
https://www.codeproject.com/Questions/1005274/LINQ-to-Entities-does-not-recognize-the-method-Sys
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