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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...
Creating a blurring overlay view
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You can use UIVisualEffectView to achieve this effect. This is a native API that has been fine-t...
Can code that is valid in both C and C++ produce different behavior when compiled in each language?
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How can I determine the current line number in JavaScript?
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edited Feb 26 '10 at 17:14
Matthew Murdoch
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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...
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:
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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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