大约有 44,000 项符合查询结果（耗时：0.0467秒） [XML]
Update a record without first querying?
...his in EF Core, but the following ensures an UPDATE without having to do a SELECT (tested with EF Core 2 and JET on the .NET Framework 4.6.2):
Ensure your model does not have IsRequired properties
Then use the following template (in VB.NET):
Using dbContext = new MyContext()
Dim beweg...
How to add 'ON DELETE CASCADE' in ALTER TABLE statement
...ARE
CURSOR consCols (theCons VARCHAR2, theOwner VARCHAR2) IS
select * from user_cons_columns
where constraint_name = theCons and owner = theOwner
order by position;
firstCol BOOLEAN := TRUE;
begin
-- For each constraint
FOR cons IN (sel...
Undo part of unstaged changes in git
...ier if you use a good editor mode or plugin, which may provide support for selecting lines directly to revert, as -p can be a bit clumsy to use sometimes. I use Magit, an Emacs mode that is very helpful for working with Git. In Magit, you can run magit-status, find the diffs for the changes that you...
What's an easy way to read random line from a file in Unix command line?
...he whole file needs to get shuffled by sort before piping it to head. shuf selects random lines from the file, instead and is much faster for me.
– Bengt
Nov 25 '12 at 17:33
1
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How to detect if a stored procedure already exists
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IF object_id('YourSp') IS NULL
EXEC ('create procedure dbo.YourSp as select 1')
GO
ALTER PROCEDURE dbo.YourSp
AS
...
This way, security settings, comments and other meta deta will survive the deployment.
share
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How to rethrow the same exception in SQL Server
...lare @ErrorMessage nvarchar(max), @ErrorSeverity int, @ErrorState int;
select @ErrorMessage = ERROR_MESSAGE() + ' Line ' + cast(ERROR_LINE() as nvarchar(5)), @ErrorSeverity = ERROR_SEVERITY(), @ErrorState = ERROR_STATE();
if @@trancount > 0 rollback transaction;
raiserror (@ErrorMessa...
Position a CSS background image x pixels from the right?
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This should be the selected as the "Correct answer". According to MDN it's supported in IE9+ and all other browsers, which is great! developer.mozilla.org/en-US/docs/Web/CSS/…
– fregante
Sep 27 '13 at 0:...
disable nganimate for some elements
...ng-show , etc, are affected by that, I want to leverage ngAnimate for some selected elements.
For performance and some bugs in elements that shows and hide very speedy.
...
Javascript: How to loop through ALL DOM elements on a page?
... // Do something with the element here
}
Note that you could use querySelectorAll(), if it's available (IE9+, CSS in IE8), to just find elements with a particular class.
if (document.querySelectorAll)
var clsElements = document.querySelectorAll(".mySpeshalClass");
else
// loop through a...
Xcode 6 iPhone Simulator Application Support location
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in the top bar select: Product -> Archive -> and then Export the Archive as a Mac Application without re-signing (the last option) you will get a .app file which you can put in your Application folder like a normal application...
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