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There can be only one auto column
How do I correct the error from MySQL 'you can only have one auto increment column'.
4 Answers
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How do I find duplicates across multiple columns?
...y
While most recent RDBMS versions support count(*) over(partition by...) MySQL V 8.0 introduced "window functions", as seen below (in MySQL 8.0)
CREATE TABLE stuff(
id INTEGER NOT NULL
,name VARCHAR(60) NOT NULL
,city VARCHAR(60) NOT NULL
);
INSERT INTO stuff(id,name,city) VALUES
...
Sublime Text 3能用支持的插件推荐 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...方法不管用，可以看看我之前写的一篇文章，Sublime text 3如何安装package control办法。
此外，安装sublime text 3的插件还可以在github上下载源文件，解压后改名放到
C:\Users\Mr.DenGo(你的电脑名)\AppData\Roaming\Sublime Text 3\Packages 中
重启su...
SQLAlchemy: print the actual query
...ho=True, to log all SQL queries. For example:
engine = create_engine(
"mysql://scott:tiger@hostname/dbname",
encoding="latin1",
echo=True,
)
This can also be modified for just a single request:
echo=False – if True, the Engine will log all statements as well as a repr() of their para...
How do I fix PyDev “Undefined variable from import” errors?
...aving a similar problem with an Eclipse/PyDev project. In this project the root directory of the python code was a sub-directory of the project.
--> MyProject
+ --> src Root of python code
+ --> module1 A module
+ --> module2 Another module
+ --> docs
+ --&g...
How do I force git to use LF instead of CR+LF under windows?
... want git to normalize all the files in the repo. To do this, go to to the root of your repo and run these commands:
git rm --cached -rf .
git diff --cached --name-only -z | xargs -n 50 -0 git add -f
If you now want git to also normalize the files in your working directory, run these commands:
g...
what is the difference between XSD and WSDL
...this answer might be helpful.
WSDL is like 'SHOW TABLE STATUS' command in mysql. It defines all the elements(request type, response type, format of URL to hit request,etc.,) which should be part of XML. By definition I mean:
1) Names of request or response
2) What should be treated as input , what ...
How to make an app's background image repeat
...
/* View someView = (View)findViewById(R.layout.main);
// Find the root view
View root = someView.getRootView();*/
// Set the color
/*root.setBackgroundColor(color.darker_gray);*/
share
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Using an image caption in Markdown Jekyll
...
That is a great idea! However, site_root is not accepted as a valid variable. When rendered it ends up as src="{{ site.url_root }}....
– orschiro
Oct 14 '13 at 19:48
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Can I specify multiple users for myself in .gitconfig?
...c user / email address which overrides the global configuration. From the root of the repo, run
git config user.name "Your Name Here"
git config user.email your@email.com
whereas the default user / email is configured in your ~/.gitconfig
git config --global user.name "Your Name Here"
git confi...