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Group query results by month and year in postgresql
...request of Radu, I will explain that query:
to_char(date,'Mon') as mon, : converts the "date" attribute into the defined format of the short form of month.
extract(year from date) as yyyy : Postgresql's "extract" function is used to extract the YYYY year from the "date" attribute.
sum("Sales") as...
Calling Java varargs method with single null argument?
...ably should have just used Arrays.toString() since the only reason it gets converted to a List is so it will print pretty.
– Mike Deck
Jun 20 '14 at 6:17
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How to check whether a string is Base64 encoded or not
... You can use also Base64.isBase64(String base64) instead of converting it to byte array yourself.
– Sasa
Feb 27 '14 at 12:00
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Python: Check if one dictionary is a subset of another larger dictionary
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Convert to item pairs and check for containment.
all(item in superset.items() for item in subset.items())
Optimization is left as an exercise for the reader.
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How do I iterate through the alphabet?
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Using these you can increment and decrement through character codes and convert back and forth easily enough. ASCII table is always a good bookmark to have too.
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Visually managing MongoDB documents and collections [closed]
...ion pipeline builder), profiling manager, storage analyzer, index advisor, convert MongoDB commands to Node.js syntax etc. Lacks in-place document editing and the ability to switch themes.
Nosqlclient - multiple shell output tabs, autocomplete, schema analyzer, index management, user/role manageme...
What is this operator in MySQL?
...a' <=> NULL)
Based on this, your particular query (fragment) can be converted to the more portable:
WHERE p.name IS NULL
Support
The SQL:2003 standard introduced a predicate for this, which works exactly like MySQL's <=> operator, in the following form:
IS [NOT] DISTINCT FROM
The fol...
Encoding URL query parameters in Java
...tricted to HTTP. Similarly, : is valid in a query string and should not be converted to %3B; a server can choose to interpret them differently.
– tc.
Mar 26 '13 at 18:38
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numpy: most efficient frequency counts for unique values in an array
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@YohanObadia - depending on the size f the array, first converting it to a series has made the final operation faster for me. I would guess at the mark of around 50,000 values.
– n1k31t4
Oct 30 '18 at 11:50
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Gitignore not working
...ce indicator at bottom right showing type of line endings. It was LF so I converted to CRLF as suggested but no dice.
Then I looked next to the line endings and noticed it was saved using UTF16. So I resaved using UTF8 encoding an voila, it worked. I didn't think the CRLF mattered so I changed i...