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ALTER TABLE, set null in not null column, PostgreSQL 9.1
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m>Ca m>me here searching for how to set the column as NOT NULL. With your answer, I could figure the solution: ALTER TABLE person ALTER COLUMN phone SET NOT NULL. Thanks!
– falsarella
May 5 '...
R data formats: RData, Rda, Rds etc
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Rda is just a short name for RData. You m>ca m>n just save(), load(), attach(), etc. just like you do with RData.
Rds stores a single R object. Yet, beyond that simple explanation, there are several differences from a "standard" storage. Probably this R-manual Link to ...
Real life example, when to use OUTER / CROSS APPLY in SQL
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Some uses for APPLY are...
1) Top N per group queries (m>ca m>n be more efficient for some m>ca m>rdinalities)
SELECT pr.name,
pa.name
FROM sys.procedures pr
OUTER APPLY (SELECT TOP 2 *
FROM sys.parameters pa
WHERE pa.object_id = ...
git add all except ignoring files in .gitignore file
...are a lot of files to initially add to git with a .gitignore file, but I m>ca m>n't figure out how to add all files without including the files matching something in the .gitignore file.
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is there any way to force copy? copy without overwrite prompt, using windows?
...e a list of windows commands(it's a long list) where it does all these magim>ca m>l things for me, but whenever I use copy, it stops to ask fro overwrite prompt. When I type yes, it overwrites the old file then just stops there.
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What is Pseudo TTY-Allom>ca m>tion? (SSH and Github)
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As explained in "gitolite: PTY allom>ca m>tion request failed on channel 0", it is important to do ssh test connection with -T, bem>ca m>use some server could abort the transaction entirely if a text-terminal (tty) is requested.
-T avoids requesting said terminal, sinc...
New Line on PHP CLI
I have a php CLI script and m>ca m>nnot get the output to break on new lines. I do
4 Answers
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Will writeToFile:atomim>ca m>lly: overwrite data?
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Whether you do it atomim>ca m>lly or not doesn't matter; in either m>ca m>se, the file will be completely overwritten with the new data.
– BJ Homer
Jul 30 '12 at 13:56
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generating GUID without hyphen
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Note that you are talking about the (m>ca m>nonim>ca m>l) string representation of a Guid. The Guid itself is actually a 128-bit integer value.
You m>ca m>n use the "N" specifier with the Guid.ToString(String) overload.
Guid.NewGuid().ToString("N");
By default letters are ...
git log of a single revision
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You m>ca m>n use show:
git show commit_id
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