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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...
How do I determine if a port is open on a Windows server? [closed]
...Programs → Turn Windows Features on or off. In the list, scroll down and select Telnet Client and click OK.
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How to delete projects in IntelliJ 12?
...n a file menu appears, you can right click the unwanted project folder and select Delete.
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Cannot use identity column key generation with ( TABLE_PER_CLASS )
...refer using 'TABLE' id generation strategy as it triggers lots of queries (select, insert, and update) and maintains locks to generate unique values for primary key. So what would be an alternate solution to this If we have a kinda big Inheritance scenario? It will certainly impact the performance a...
How to see JavaDoc in IntelliJ IDEA? [duplicate]
...oup. You will not find this setting in one of the its entries. You have to select the Editor “group” itself and it will show a settings page on the right where the option is.
– Matthias Ronge
Feb 16 '15 at 8:30
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Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr
... reinstalled like this:
rm -rf /Library/Developer/CommandLineTools
xcode-select --install
Then i ran the previous command again:
open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
After install the error was fixed!
...
Windows equivalent of the 'tail' command
...n*}"
Tail Command:
powershell -command "& {Get-Content *filename* | Select-Object -last *n*}"
or, directly from PowerShell:
Get-Content *filename* -TotalCount *n*
Get-Content *filename* | Select-Object -last *n*
update
PowerShell 3.0 (Windows 8 and higher) added Tail command with alias...
JavaScript - Getting HTML form values
... POST) you can use:
JavaScript
const formData = new FormData(document.querySelector('form'))
for (var pair of formData.entries()) {
// console.log(pair[0] + ': ' + pair[1]);
}
form-serialize (https://code.google.com/archive/p/form-serialize/)
serialize(document.forms[0]);
jQuery
$("form").serial...
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...ere an example of a if with dynamic conditions translated to a dictionary.
selector = {lambda d: datetime(2014, 12, 31) >= d : 'before2015',
lambda d: datetime(2015, 1, 1) <= d < datetime(2016, 1, 1): 'year2015',
lambda d: datetime(2016, 1, 1) <= d < datetime(2...
How to escape single quotes in MySQL
...
Put quite simply:
SELECT 'This is Ashok''s Pen.';
So inside the string, replace each single quote with two of them.
Or:
SELECT 'This is Ashok\'s Pen.'
Escape it =)
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