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How to DROP multiple columns with a single ALTER TABLE statement in SQL Server?
...p-statements:
mysql> alter table test2 drop column (c1,c2,c3);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(c1,c2,c3)' at line 1
mysql> alter table test2 drop column c1,c2,c3;
ERROR ...
How do I assign a port mapping to an existing Docker container?
...un screen ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/tty Once you get the tty running you can navigate to /var/lib/docker
– nommer
Jul 27 '18 at 20:20
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Numpy how to iterate over columns of array?
...ollowing matrix
mat2 = np.array([1,5,6,7,3,0,3,5,9,10,8,0], dtype=np.float64).reshape(3, 4)
The function for mean is
def my_mean(x):
return sum(x)/len(x)
To do what is needed and store result in colon vector 'results'
results = np.zeros(4)
for i in range(0, 4):
mat2[:, i] = my_mean(ma...
How does OpenID authentication work?
...led website.
User enters credential information.
A POST is made with a BASE64 (website to provider)
An answer is built (that contains expiration)
The website redirects the user to the provider to login.
User enters password and submit.
Verification is done.
Login!
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What is a “Bitmap heap scan” in a query plan?
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Denis de BernardyDenis de Bernardy
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How to check in Javascript if one element is contained within another
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Glen Selle
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answered Aug 14 '13 at 14:12
Brian Di PalmaBrian ...
How to store a dataframe using Pandas
... data needs to be transformed after loading (i.e. string/object to datetime64) this would need to be done again after loading a saved csv, resulting in performance loss. pickle saves the dataframe in it's current state thus the data and its format is preserved. This can lead to massive performance i...
In Java, how do I convert a byte array to a string of hex digits while keeping leading zeros? [dupli
...ultiplyByZer0
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answered Dec 1 '08 at 22:12
Brandon DuRetteBrandon DuRette
4...
Is REST DELETE really idempotent?
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Jason McCrearyJason McCreary
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n-grams in python, four, five, six grams?
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I'm surprised that this hasn't shown up yet:
In [34]: sentence = "I really like python, it's p...