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How to concatenate columns in a Postgres SELECT?
...xpression valid in any case.
For non-string data types, you can "fix" the 1st statement by casting at least one argument to text. (Any type can be cast to text):
SELECT a::text || b AS ab FROM foo;
Judging from your own answer, "does not work" was supposed to mean "returns NULL". The result of a...
LINQ, Where() vs FindAll()
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answered Dec 21 '09 at 4:39
Adam RobinsonAdam Robinson
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Why is Thread.Sleep so harmful
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163
The problems with calling Thread.Sleep are explained quite succinctly here:
Thread.Sleep h...
move_uploaded_file gives “failed to open stream: Permission denied” error
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13 Answers
13
Active
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PatternSyntaxException: Illegal Repetition when using regex in Java
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172
The { and } are special in Java's regex dialect (and most other dialects for that matter): the...
Using GZIP compression with Spring Boot/MVC/JavaConfig with RESTful
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189
The rest of these answers are out of date and/or over the top complicated for something that s...
Setting PayPal return URL and making it auto return?
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199
+250
You ha...
What are the differences between Clojure, Scheme/Racket and Common Lisp?
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104
They all have a lot in common:
Dynamic languages
Strongly typed
Compiled
Lisp-style syntax, ...
How to display a dynamically allocated array in the Visual Studio debugger?
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197
Yes, simple.
say you have
char *a = new char[10];
writing in the debugger:
a,10
would sh...