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Does MySQL foreign_key_checks affect the entire database?
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It is session-based, when set the way you did in your question.
https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html
According to this, FOREIGN_KEY_CHECKS is "Both" for scope. This means it can be set for session:
SET FO...
Position Absolute + Scrolling
...s position to relative makes the absolutely position elements inside of it base their position and height on it rather than on the .container div, which has a fixed height. Without the inner, relatively positioned div, the .full-height div will always calculate its dimensions and position based on ....
What's the difference between integer class and numeric class in R
...he number is stored in two pieces: the exponent (like 308 above, except in base 2 rather than base 10), and the "significand" (like 1.797693 above).
Note that 'is.integer' is not a test of whether you have a whole number, but a test of how the data are stored.
One thing to watch out for is that t...
Why is JsonRequestBehavior needed?
...t.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
base.OnResultExecuting(filterContext);
}
}
and use it on your action
[AllowJsonGet]
public JsonResult MyAjaxAction()
{
return Json("this is my test");
}
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git pull VS git fetch Vs git rebase
...u're actually just asking about the difference between git merge and git rebase.
So let's suppose you're in the common case - you've done some work on your master branch, and you pull from origin's, which also has done some work. After the fetch, things look like this:
- o - o - o - H - A - B - C...
How to check if variable's type matches Type stored in a variable
...Type() exists on every single framework type, because it is defined on the base object type. So, regardless of the type itself, you can use it to return the underlying Type
So, all you need to do is:
u.GetType() == t
shar...
dealloc in Swift
...still present in the case of non-weakly zeroing reference observers. Block based observers via the -[NSNotificationCenter addObserverForName:object:queue:usingBlock] method still need to be un-registered when no longer in use since the system still holds a strong reference to these observers. Removi...
Count(*) vs Count(1) - SQL Server
..._GUID() in Oracle is quite computation intensive function.
In my test database, t_even is a table with 1,000,000 rows
This query:
SELECT COUNT(SYS_GUID())
FROM t_even
runs for 48 seconds, since the function needs to evaluate each SYS_GUID() returned to make sure it's not a NULL.
However, t...
'setInterval' vs 'setTimeout' [duplicate]
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setInterval()
setInterval is a time interval based code execution method that has the native ability to repeatedly run specified script when the interval is reached. It should not be nested into its callback function by the script author to make it loop, since it loops ...
Find nearest latitude/longitude with an SQL query
I have latitude and longitude and I want to pull the record from the database, which has nearest latitude and longitude by the distance, if that distance gets longer than specified one, then don't retrieve it.
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