大约有 40,000 项符合查询结果（耗时：0.0324秒） [XML]
Surrogate vs. natural/business keys [closed]
...tage of surrogate keys is that they are meaningless (cited as an advantage by some, but...). This sometimes forces you to join a lot more tables into your query than should really be necessary. Compare:
select sum(t.hours)
from timesheets t
where t.dept_code = 'HR'
and t.status = 'VALID'
and t.pr...
SQLite add Primary Key
I created a table in Sqlite by using the CREATE TABLE AS syntax to create a table based on a SELECT statement. Now this table has no primary key but I would like to add one.
...
Get size of all tables in database
...IKE 'dt%'
AND t.is_ms_shipped = 0
AND i.OBJECT_ID > 255
GROUP BY
t.Name, s.Name, p.Rows
ORDER BY
TotalSpaceMB DESC, t.Name
share
|
improve this answer
|
...
Can an html element have multiple ids?
...You can and is a frecuent and correct thing use multiple times one element by its id. What I think you are addressing is another interpretation which is : you sould use one (and only one) id for an element and ONLY for that element.
– Mbotet
Dec 30 '19 at 9:34
...
INSERT IF NOT EXISTS ELSE UPDATE?
...on Confliction from new one. In above case all other data will be replaced by new one that is not correct.
– Mrug
Apr 9 '14 at 11:25
|
show ...
In Angular, I need to search objects in an array
.../5/
Created a filter that you also can use in 'ng-repeat'
app.filter('getById', function() {
return function(input, id) {
var i=0, len=input.length;
for (; i<len; i++) {
if (+input[i].id == +id) {
return input[i];
}
}
return null;
}
});
Usage in control...
In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
...ing to generate html from your markdown. I noticed, that jekyll (it's used by gihub.io pages by default) automatically adds the id="" attribute to headings in the html it generates.
For example if you're markdown is
My header
---------
The resulting html will look like this:
<h2 id="my-heade...
How to conditionally push an item in an observable array?
...(o2);
combo.push(o3);
function find()
{
var ide=document.getElementById("vid").value;
findandset(Number(ide),mysel);
}
function indx()
{
var x=document.getElementById("kam").selectedIndex;
alert(x);
}
function getsel()
{
alert(mysel().valuee());
}
function findand...
Web API Routing - api/{controller}/{action}/{id} “dysfunctions” api/{controller}/{id}
...n "object of id id";
}
[HttpGet]
public IEnumerable<string> ByCategoryId(int id)
{
return new string[] { "byCategory1", "byCategory2" };
}
share
|
improve this answer
|
...
Change Active Menu Item on Page Scroll?
...
It's done by binding to the scroll event of the container (usually window).
Quick example:
// Cache selectors
var topMenu = $("#top-menu"),
topMenuHeight = topMenu.outerHeight()+15,
// All list items
menuItems = topMenu.f...