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MySQL, update multiple tables with one query
...'blah';
To see what this is going to update, you can convert this into a select statement, e.g.:
SELECT t2.t1_id, t2.t3_id, t1.a, t2.b, t2.c AS t2_c, t3.c AS t3_c
FROM t1
INNER JOIN t2 ON t2.t1_id = t1.id
INNER JOIN t3 ON t2.t3_id = t3.id
WHERE t1.a = 'blah';
An example using the same tables as...
Unresolved reference issue in PyCharm
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After all this don't forget to restart. In PyCharm menu select: File --> Invalidate Caches / Restart
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How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
...tep 1: Add VBA reference to "Microsoft VBScript Regular Expressions 5.5"
Select "Developer" tab (I don't have this tab what do I do?)
Select "Visual Basic" icon from 'Code' ribbon section
In "Microsoft Visual Basic for Applications" window select "Tools" from the top menu.
Select "References"
Chec...
Maven2: Best practice for Enterprise Project (EAR file)
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What helped me a lot was to run the Maven archetype:generate goal and select from one of the archetypes, some of which seem to be updated regularly (in particular JBoss seems to be well maintained).
mvn archetype:generate
Hundreds of archetypes appeared in a numbered list from which to selec...
Do the JSON keys have to be surrounded by quotes?
...ins and ends with
quotation marks. [...]
string = quotation-mark *char quotation-mark
quotation-mark = %x22 ; "
Read the whole RFC here.
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Count the number of occurrences of a character in a string in Javascript
I need to count the number of occurrences of a character in a string.
33 Answers
33
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Convert Json Array to normal Java list
...op is missing the closing parenthesis... tried editing but it's not enough characters to pass approval. oh well! just an FYI.
– Matt K
Sep 21 '11 at 17:09
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#1071 - Specified key was too long; max key length is 1000 bytes
... the best prefix length for a given column? Here's a method to find out:
SELECT
ROUND(SUM(LENGTH(`menu_link`)<10)*100/COUNT(`menu_link`),2) AS pct_length_10,
ROUND(SUM(LENGTH(`menu_link`)<20)*100/COUNT(`menu_link`),2) AS pct_length_20,
ROUND(SUM(LENGTH(`menu_link`)<50)*100/COUNT(`menu_...
What's the point of malloc(0)?
...que pointer that can be passed to free"), but if you're treating this as a char*, that may give you an invalid, non-terminated char. It could be dangerous to rely on this in cross-platform situations.
– Reed Copsey
Jan 7 '10 at 17:51
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javac not working in windows command prompt
...anced" tab ⇒ Environment Variables
In "System Variables", scroll down to select "PATH" ⇒ Edit
(( now read the following 3 times before proceeding, THERE IS NO UNDO ))
In "Variable value" field, INSERT "c:\Program Files\Java\jdk1.8.0_xx\bin" (Replace xx with the upgrade number and VERIFY that ...