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Which SQL query is faster? Filter on Join criteria or Where clause?
...LEFT JOIN
TableXRef x
ON x.TableAID = a.ID
AND a.ID = 1
LEFT JOIN
TableB b
ON x.TableBID = b.ID
or this:
SELECT *
FROM TableA a
LEFT JOIN
TableXRef x
ON x.TableAID = a.ID
LEFT JOIN
TableB b
ON b.id = x.TableBID
WHERE a.id = 1
The...
The modulo operation on negative numbers in Python
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134
Unlike C or C++, Python's modulo operator (%) always return a number having the same sign as t...
How do I measure separate CPU core usage for a process?
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141
You can still do this in top. While top is running, press '1' on your keyboard, it will then ...
Filter Java Stream to 1 and only 1 element
...tors.toList(),
list -> {
if (list.size() != 1) {
throw new IllegalStateException();
}
return list.get(0);
}
);
}
We use Collectors.collectingAndThen to construct our desired Collector by
Collecting o...
How to format a number as percentage in R?
...
10 Answers
10
Active
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Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AS” and “Latin1_General_CI_
...
315
You have a mismatch of two different collations in your table. You can check what collations ea...
Delete specific line number(s) from a text file using sed?
...
If you want to delete lines 5 through 10 and 12:
sed -e '5,10d;12d' file
This will print the results to the screen. If you want to save the results to the same file:
sed -i.bak -e '5,10d;12d' file
This will back the file up to file.bak, and delete the given...