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how to exclude null values in array_agg like in string_agg using postgres?
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SQL Fiddle
select
id,
(select array_agg(a) from unnest(canonical_users) a where a is n...
How to keep the spaces at the end and/or at the beginning of a String?
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512
Even if you use string formatting, sometimes you still need white spaces at the beginning or the...
The provider is not compatible with the version of Oracle client
I'm trying to use the Oracle ODP.NET 11g (11.1.0.6.20) Instant Client on my ASP.net project as a Data Provider but when I run the aspx page I get a " The provider is not compatible with the version of Oracle client " error message. Any help would be appreciated.
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pg_config executable not found
I am having trouble installing psycopg2. I get the following error when I try to pip install psycopg2 :
43 Answers
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The type or namespace name could not be found [duplicate]
I have a C# solution with several projects in Visual Studio 2010 .
One is a test project (I'll call it " PrjTest "), the other is a Windows Forms Application project (I'll call it " PrjForm "). There is also a third project referenced by PrjForm, which it is able to reference and use successfu...
Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
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226
The default collation for stored procedure parameters is utf8_general_ci and you can't mix col...
How exactly does the “Specific Version” property of an assembly reference work in Visual Studio?
...at the "Specific Version" property of assembly references in Visual Studio 2010. After a few experiments with unexpected results I set out to learn as much as possible about how the property works. Even SO, it appears to me, does not have all the answers, so here is my attempt at self-answering the ...
Can't get rid of header X-Powered-By:Express
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248
In Express >= 3.0.0rc5:
app.disable('x-powered-by');
Here is a simple middleware that re...
Forward function declarations in a Bash or a Shell script?
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2 Answers
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