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Oracle find a constraint
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AND uc.constraint_type = 'R'
AND uc.constraint_name = 'SYS_C00381400'
ORDER BY ucc1.TABLE_NAME ,
uc.constraint_name;
From here.
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Linq 多字段排序，二次排序 - .NET(C#) - 清泛IT论坛，有思想、有深度
Linq：ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );
类似SQL：select * from t1 order by f1 desc ,f2 asc
这种写法里 OrderBy、ThenBy 是升序的，OrderByDescending、ThenByDescending 是降序的。
How to detect Ctrl+V, Ctrl+C using JavaScript?
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With jquery you can easy detect copy, paste, etc by binding the function:
$("#textA").bind('copy', function() {
$('span').text('copy behaviour detected!')
});
$("#textA").bind('paste', function() {
$('span').text('paste behaviour detected!')
});
$("#textA").b...
What happens to git commits created in a detached HEAD state?
... I thought so. Meh... it would have been a nice feature in order to reference rewritten/lost trees (for reviewed pull requests, in my case) [Maybe I should open a feature request!]. Anyway, thank you.
– Kamafeather
Jul 24 '18 at 15:01
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Can hash tables really be O(1)?
...for use in a dictionary does not have to look at every bit in the input in order to calculate the hash. Implementations are free to look at only a fixed number of bits.
For sufficiently many items the number of items will become greater than the number of possible hashes and then you will get colli...
How to retrieve a single file from a specific revision in Git?
...pposed to git show, which allows you to save it under a different name, in order for you to get and see both (the current version and the old version). It is unclear from the question if the OP wants to replace its current version by an old one.
– VonC
Jun 6 '1...
How to delete every other line in Vim?
...e from a Vim buffer, starting with the second one, i.e., lines 2, 4, 6, etc. For example, if the buffer’s contents is:
...
Adding a new value to an existing ENUM Type
...he enum type you want to change, you can try this. Also you can change the order of values in the new type.
-- 1. rename the enum type you want to change
alter type some_enum_type rename to _some_enum_type;
-- 2. create new type
create type some_enum_type as enum ('old', 'values', 'and', 'new', 'on...
What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...uld certain image file types be used when building websites or interfaces, etc?
13 Answers
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Explanation of BASE terminology
...the requirements for immediate consistency, data freshness and accuracy in order to gain other benefits, like scalability and resiliency.
BASE stands for -
Basic Availability - The database appears to work most of the time.
Soft-state - Stores don't have to be write-consistent, nor do different...