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Check if database exists in PostgreSQL using shell
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Just now seeing this, nice
– vol7ron
Feb 3 '14 at 4:14
1
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How do you remove all the options of a select box and then add one option and select it with jQuery?
... Wouldn't this create a memory leak? The option elements are now inaccessible but still allocated.
– Synetech
Mar 6 '19 at 19:57
add a comment
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SQL MAX of multiple columns?
...M (VALUES (1,2), (5,3), (1,4)) as tableOfValues(columnName1, ColumnName2) Now you can understand why that sample query has AS value(v) in it. My final query looked like this: SELECT Max(currentValues) as Max FROM (VALUES (12), (25), (35)) AS allCurrents(currentValues) It will pick the max val...
For every character in string
... Well, OK, it has no encoding, however given the ubiquity of utf8 now (especially on the web) and the fact that one might want a single consistent encoding throughout a pipeline or application, for the basis of this discussion my std::strings are all utf8 :p.
– Robinso...
How to insert a line break in a SQL Server VARCHAR/NVARCHAR string
... this topic, and I had to research this for something I'm working on right now. Thought I would post the answer for it in case anyone else had the same question.
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What is the maximum length of a Push Notification alert text?
... bytes. There is no restriction on the size of the alert text as far as I know, but only the total payload size. So considering if the payload is minimal and only contains the alert information, it should look like:
{"aps":{"alert":""}}
That takes up 20 characters (20 bytes), leaving 236 bytes to...
Visual Studio 2013 doesn't discover unit tests
... Eventually I figured out it was #2 in my list, so I wanted to leave that knowledge, plus the other tricks I've picked up over time.
– AndyG
Mar 18 '15 at 18:50
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How to escape @ characters in Subversion managed file names?
...aths or URLs that actually have at signs in them. After all, how does svn know whether news@11 is the name of a directory in my tree or just a syntax for “revision 11 of news”? Thankfully, while svn will always assume the latter, there is a trivial workaround. You need only append an at sign to ...
UnicodeEncodeError: 'charmap' codec can't encode - character maps to , print function [du
...ssue for me. Regarding the above: "sys.stdout.encoding" probably does not know your terminal encoding, but only the system-wide encoding. If this is not equal to the terminal, then only parsing some environment variables may help. But that wont work always, as a terminal must not tell the other side...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
...in any aggregate expression; otherwise, the order is undefined. So you can now write:
SELECT company_id, string_agg(employee, ', ' ORDER BY employee)
FROM mytable
GROUP BY company_id;
Or indeed:
SELECT string_agg(actor_name, ', ' ORDER BY first_appearance)
PostgreSQL 8.4 or later:
PostgreSQL ...