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Sql Server equivalent of a COUNTIF aggregate function
... a CASE statement, like this:
SELECT SUM(CASE WHEN myColumn=1 THEN 1 ELSE 0 END)
FROM AD_CurrentView
Note: in my own test NULLs were not an issue, though this can be environment dependent. You could handle nulls such as:
SELECT SUM(CASE WHEN ISNULL(myColumn,0)=1 THEN 1 ELSE 0 END)
FROM AD_Curren...
What is the difference between a WCF Service Application and a WCF Service Library?
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edited Jan 26 '11 at 12:05
answered Jul 30 '09 at 4:34
An...
When tracing out variables in the console, How to create a new line?
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answered Apr 26 '13 at 15:01
Selvakumar ArumugamSelvakumar Arumugam
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How to parse a JSON string into JsonNode in Jackson?
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edited Apr 3 '15 at 20:37
John Gietzen
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TypeScript or JavaScript type casting
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301
You can cast like this:
return this.createMarkerStyle(<MarkerSymbolInfo> symbolInfo);
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Opening port 80 EC2 Amazon web services [closed]
I've opened port 80 in the web console on my E2C instance's security group but I still can't access it via the public dns in the browser.
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How to get svn remote repository URL?
... Root: http://svn.red-bean.com/repos/test
Repository UUID: 5e7d134a-54fb-0310-bd04-b611643e5c25
Revision: 4417
Node Kind: file
Schedule: normal
Last Changed Author: sally
Last Changed Rev: 20
Last Changed Date: 2003-01-13 16:43:13 -0600 (Mon, 13 Jan 2003)
Text Last Updated: 2003-01-1...
Is it a good idea to index datetime field in mysql?
... elimination of rows between conditions: http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html
This makes your datetime column an excellent candidate for an index if you are going to be using it in conditions frequently in queries. If your only condition is BETWEEN NOW() AND DATE_ADD(NOW(), IN...
Difference between sampling and profiling in jVisualVM
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10
I have found that Sampling is more than accurate enough every time I've used it for pinpointing the bad performing methods. I personally nev...
How to create an instance of anonymous class of abstract class in Kotlin?
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Michael LangMichael Lang
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add a com...