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Can table columns with a Foreign Key be NULL?
...affected (0.01 sec)
INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFERENCES `parent` (`id`))
The first insert will pass because we i...
Add IIS 7 AppPool Identities as SQL Server Logons
... it will try to treat it as such...which won't work, and will give you the error message about it not being found).
How I've gotten it to work is:
In SQL Server Management Studio, look for the Security folder (the security folder at the same level as the Databases, Server Objects, etc. folders.....
“The Controls collection cannot be modified because the control contains code blocks”
... add a AjaxToolkit SliderExtender to the user control I get this (*&$#()@# error:
22 Answers
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How to get Vim to highlight non-ascii characters?
...f the indentation character got pasted into my python code and the unicode error start killing me. was hard to detect among the same character used by vim plugin!
– kollery
Apr 6 '17 at 13:08
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AttributeError: 'module' object has no attribute 'urlopen'
...ython to download the HTML source code of a website but I'm receiving this error.
12 Answers
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How to append to a file in Node?
...the great benefits of Node, which is async operations. Make sure you catch errors. Perhaps on some OSes, you can get access denied if requesting the file handle at the same time. Not sure about that.
– SilentSteel
Dec 1 '14 at 3:30
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Can I set variables to undefined or pass undefined as an argument?
...s operand is a simple variable that does not exist, instead of throwing an error as would normally happen if you tried to refer to it. (You can also give it a simple variable wrapped in parentheses, but not a full expression involving a non-existant variable.) Not much use for that, either.
This is ...
Simple way to repeat a String in java
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answered Jul 28 '11 at 11:05
CanerCaner
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Can you create nested WITH clauses for Common Table Expressions?
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305
While not strictly nested, you can use common table expressions to reuse previous queries in su...
Is there a job scheduler library for node.js? [closed]
.../scripts.js?
– ArVan
Dec 6 '12 at 9:05
does node-cron allow you to edit system cron jobs from node.js? Is it depende...