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T-SQL: Deleting all duplicate rows but keeping one [duplicate]
...e AS (
SELECT[foo], [bar],
row_number() OVER(PARTITION BY foo, bar ORDER BY baz) AS [rn]
FROM TABLE
)
DELETE cte WHERE [rn] > 1
Play around with it and see what you get.
(Edit: In an attempt to be helpful, someone edited the ORDER BY clause within the CTE. To be clear, you can order ...
In Vim, how do I apply a macro to a set of lines?
...at performs an operation on a single line. I want to repeat that macro on all of the remaining lines in the file. Is there a quick way to do this?
...
Prepend a level to a pandas MultiIndex
...oo'
df.set_index('Firstlevel', append=True, inplace=True)
And change the order if needed with:
df.reorder_levels(['Firstlevel', 'A', 'B'])
Which results in:
Vals
Firstlevel A B
Foo a1 b1 0.871563
b2 0.494001
a2 b3 -0.167811
...
Difference between variable declaration syntaxes in Javascript (including global variables)?
... the window object.) You can use a function to contain all of your code in order to contain your symbols, and that function can be anonymous if you like:
(function() {
var a = 0; // `a` is NOT a property of `window` now
function foo() {
alert(a); // Alerts "0", because `foo` can ...
How to convert a PNG image to a SVG? [closed]
...ate three initial images (one for each color). Then convert to SVG. And finally, merge the three SVG content in one file (SVG is XML based). Hope this could help... Cheers ;-)
– olibre
Oct 9 '14 at 19:21
...
How to negate the whole regex?
...
How do I convert CamelCase into human-readable names in Java?
Regex for all strings not containing a string?
A regex to match a substring that isn’t followed by a certain other substring.
More examples
These are attempts to come up with regex solutions to toy problems as exercises; they shou...
Real world use of JMS/message queues? [closed]
...A real world example is that of a web application that is used to place an order for a particular customer. As part of placing that order (and storing it in a database) you may wish to carry a number of additional tasks:
Store the order in some sort of third party back-end system (such as SAP)
Se...
OS X Terminal Colors [closed]
...;31m\]\u\[\e[0m\]@\[\e[0;32m\]\h\[\e[0m\]:\[\e[0;34m\]\w\[\e[0m\]\$ '
For all my SSH accounts online I make sure to put the hostname in red, to distinguish if I'm in a local or remote terminal. Just edit the .bash_profile file in your home dir on the server.. If there is no .bash_profile file on ...
Minimum and maximum value of z-index?
...ts capped at that, so unless you're using absurdly large z-index values to order multiple elements you shouldn't have a problem (i.e. setting one element to a z-index value of 2147483647 will ensure that element stays at the very top in any browser, unless it's competing with another element that al...
How to sort mongodb with pymongo
...
In python you cannot guarantee that dictionary will be interpreted in the order you declared.
So, in mongo shell you could do .sort({'field1':1,'field2':1}) and the interpreter should sort field1 at first level and field 2 at second level.
If this sintax was used in python, there is a chance to ...