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MySQL, better to insert NULL or empty string?
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One thing to consider, if you ever plan on switching databases, is that Oracle does not support empty strings. They are converted to NULL automatically and you can't query for them using clauses like WHERE somefield = '' .
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What is the Oracle equivalent of SQL Server's IsNull() function?
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jquery-ui sortable | How to get it work on iPad/touchdevices?
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GROUP_CONCAT ORDER BY
...MySQL only function, however a similar result can be achieved on other database with a surrogate function ...
– aleroot
Apr 30 '15 at 20:41
2
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How to write multiple line property value using PropertiesConfiguration?
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How many characters can UTF-8 encode?
... always uses 2 bytes, but UTF-8 uses one byte per character for most latin-based language characters. Making it twice as compact.
– sanderd17
Mar 25 '19 at 8:17
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must appear in the GROUP BY clause or be used in an aggregate function
...s, ordered by avg, and returns the first element (arrays in postgres are 1-based).
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Remove blank attributes from an Object in Javascript
...y value
}
});
return newObj;
};
5) A functional approach to 4b) based on @MichaelJ.Zoidl's answer using filter() and reduce(). This one returns a new object as well:
const removeEmpty = obj =>
Object.keys(obj)
.filter(k => obj[k] != null) // Remove undef. and null.
.reduc...
Best practices for storing postal addresses in a database (RDBMS)?
... use, one schema to consider is the one used by Drupal Address Field. It's based on the xNAL standard, and seems to cover most international cases. A bit of digging into that module will reveal some nice pearls for interpreting and validating addresses internationally. It also has a nice set of admi...
Regex how to match an optional character
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