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Add primary key to existing table
...
drop constraint and recreate it
alter table Persion drop CONSTRAINT <constraint_name>
alter table Persion add primary key (persionId,Pname,PMID)
edit:
you can find the constraint name by using the query below:
select OBJECT_NAME(...
CSS Pseudo-classes with inline styles
...g the delimiting braces), whose formal grammar is given below in the terms and conventions of the CSS core grammar:
declaration-list
: S* declaration? [ ';' S* declaration? ]*
;
Neither selectors (including pseudo-elements), nor at-rules, nor any other CSS construct are allowed.
Think of inlin...
Finding the Eclipse Version Number
...Eclipse Version" question references a .eclipseproduct in the main folder, and it contains:
name=Eclipse Platform
id=org.eclipse.platform
version=3.x.0
So that seems more straightforward than my original answer below.
Also, Neeme Praks mentions below that there is a eclipse/configuration/config....
Detect changed input text box
I've looked at numerous other questions and found very simple answers, including the code below. I simply want to detect when someone changes the content of a text box but for some reason it's not working... I get no console errors. When I set a breakpoint in the browser at the change() functio...
Why doesn't Java allow generic subclasses of Throwable?
...; e) {
// ignore that
} catch (SomeException<String> e) {
crashAndBurn()
}
Both SomeException<Integer> and SomeException<String> are erased to the same type, there is no way for the JVM to distinguish the exception instances, and therefore no way to tell which catch block s...
How do I hide an element when printing a web page?
... answer is not complete. You have to have two media sections. @media print and @media screen. In the print section, you place your styles for printing. In the screen screen section, you place your styles for screen printing. You can even have multiple screen sections for different resolutions. Basic...
What are “res” and “req” parameters in Express functions?
...mine what kind of browser made the request, what sort of responses it can handle, whether or not it's able to understand HTTP compression, etc.
An array of query string parameters if there were any, in request.query (e.g. /people.json?foo=bar would result in request.query.foo containing the string "...
What is the equivalent of “colspan” in an Android TableLayout?
I'm using a TableLayout in Android. Right now I have one TableRow with two items in it, and, below that, a TableRow with one item it it. It renders like this:
...
How do I detect if software keyboard is visible on Android Device or not?
Is there a way in Android to detect if the software (a.k.a. "soft") keyboard is visible on screen?
30 Answers
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Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、...
... Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、闹钟和多种通知类型
Notifier 通知扩展
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