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Calculate difference between two datetimes in MySQL
...MySQL function. For example, you can use:
SELECT TIMESTAMPDIFF(SECOND, '2012-06-06 13:13:55', '2012-06-06 15:20:18')
In your case, the third parameter of TIMSTAMPDIFF function would be the current login time (NOW()). Second parameter would be the last login time, which is already in the database....
Select elements by attribute in CSS
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edited Mar 26 '14 at 3:22
answered Mar 16 '11 at 11:09
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Update date + one year in mysql
When I want setting numerical value +1 in mysql table, I use e.g.:
3 Answers
3
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Excel VBA - exit for loop
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answered Feb 23 '12 at 14:39
DanDan
4,64111 gold badge1414 silver badges2727 bronze badges
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Linux bash: Multiple variable assignment
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First thing that comes into my mind:
read -r a b c <<<$(echo 1 2 3) ; echo "$a|$b|$c"
output is, unsurprisingly
1|2|3
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How to do math in a Django template?
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156
You can use the add filter:
{{ object.article.rating_score|add:"-100" }}
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Fixed stroke width in SVG
... the stroke-width on an SVG element to be "pixel-aware", that is always be 1px wide regardless of the current scaling transformations applied. I am aware that this may well be impossible, since the whole point of SVG is to be pixel independent.
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add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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Mercurial (hg) commit only certain files
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159
You can specify the files on the command line, as tonfa writes:
$ hg commit foo.c foo.h dir/
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SQL multiple column ordering
...ng to sort by multiple columns in SQL, and in different directions. column1 would be sorted descending, and column2 ascending.
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