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Difference between DateTime and Time in Ruby
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Newer versions of Ruby (2.0+) do not really have significant differences between the two class...
postgresql return 0 if returned value is null
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use coalesce
COALESCE(value [, ...])
The COALESCE function returns the first of its argume...
How to set Sqlite3 to be case insensitive when string comparing?
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How to recursively find and list the latest modified files in a directory with subdirectories and ti
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must appear in the GROUP BY clause or be used in an aggregate function
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Yes, this is a common aggregation problem. Before SQL3 (1999), the selected fields must appear in the GROUP BY clause[*].
To workaround this issue, you must calculate the aggregate in a sub-query and then join it with itself to get the additional columns you'd need to show:
SEL...
What is the exact difference between currentTarget property and target property in javascript
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Basically, events bubble by default so the difference between the two is:
target is the elemen...
How to test if parameters exist in rails
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What is & used for
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& is HTML for "Start of a character reference".
& is the character reference for ...