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MySQL: Set user variable from result of query
...ts, the assignment operator must be := and not = because = is treated as a comparison operator in non-SET statements.
UPDATE:
Further to comments below, you may also do the following:
SET @user := 123456;
SELECT `group` FROM user LIMIT 1 INTO @group;
SELECT * FROM user WHERE `group` = @group;
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Is \d not supported by grep's basic expressions?
This does not generate any output. How come?
2 Answers
2
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How to negate the whole regex?
...r-expressions.info
Lookahead and Lookbehind Zero-Width Assertions
Flavor comparison
See also
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 exam...
Purging file from Git repo failed, unable to create new backup
... a filter-branch operation. After filter-branch, Git keeps refs to the old commits around, in case something goes wrong.
You can find those in .git/refs/original/…. Either delete that directory and all files within, or use the -f flag to force Git to delete the old references.
git filter-branch...
Python TypeError: not enough arguments for format string
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Note that the % syntax for formatting strings is becoming outdated. If your version of Python supports it, you should write:
instr = "'{0}', '{1}', '{2}', '{3}', '{4}', '{5}', '{6}'".format(softname, procversion, int(percent), exe, description, company, procurl)
This also ...
How to select a node using XPath if sibling node has a specific value?
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How to get min/max of two integers in Postgres/SQL?
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Case Insensitive Flask-SQLAlchemy Query
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Would this make the query slower compared to the filter_by method where the username column is indexed?
– CaptainDaVinci
Jul 24 '18 at 12:02
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How to have no pagebreak after \include in LaTeX
...er each subsection because my subsections are in separate files. I use the command \include{file} which adds a pagebreak after the use of it.
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How can I make gdb save the command history?
How can I set up gdb so that it saves the command history? When starting a new gdb session I'd like to use the arrow up keys to access the commands of the previous sessions.
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