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postgresql - sql - count of `true` values
...unt(nullif(myCol, false)), -- count true values
count(myCol);
http://www.postgresql.org/docs/9.0/static/functions-conditional.html
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Difference between wait and sleep
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Regex exactly n OR m times
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Here is the complete list of quantifiers (ref. http://www.regular-expressions.info/reference.html):
?, ?? - 0 or 1 occurences (?? is lazy, ? is greedy)
*, *? - any number of occurences
+, +? - at least one occurence
{n} - exactly n occurences
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R object identification
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Append an element with fade in effect [jQuery]
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Python xml ElementTree from a string source?
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How to see the CREATE VIEW code for a view in PostgreSQL?
...true)
A list of all those functions is available in the manual:
http://www.postgresql.org/docs/current/static/functions-info.html
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How to lazy load images in ListView in Android
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What is the difference between print and puts?
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