大约有 41,500 项符合查询结果（耗时：0.0534秒） [XML]
DISTINCT for only one column
...OM Products
WHERE ProductModel = 2
AND ProductName LIKE 'CYBER%'
) a
WHERE rn = 1
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Why does `a == b or c or d` always evaluate to True?
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In many cases, Python looks and behaves like natural English, but this is one case where that abstraction fails. People can use context clues to determine that "Jon" and "Inbar" are objects joined to the verb "equals", but the Python interpreter is more...
How to run SQL script in MySQL?
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If you’re at the MySQL command line mysql> you have to declare the SQL file as source.
mysql> source \home\user\Desktop\test.sql;
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Convert JSON style properties names to Java CamelCase names with GSON
...lowing setting works perfect when reading json with underscored attributes and using camelcasing in my models.
Gson gson = new GsonBuilder()
.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
.create()
...
Operator precedence with Javascript Ternary operator
...ause> is assigned to <variable>, <false clause> is ignored, and the next statement is executed.
If <expression> evaluates to false, then <true clause> is ignored and the value of <false clause> is assigned to <variable>.
The important thing to realise with th...
Grep only the first match and stop
... you. btw - are all those other arguments necessary that I have in the command? and what if I can't pipe it by chance (just in case).
– Tim Kamm
Dec 30 '12 at 18:48
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No submodule mapping found in .gitmodule for a path that's not a submodule
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Following rajibchowdhury's answer (upvoted), use git rm command which is advised is for removing the special entry in the index indicating a submodule (a 'folder' with a special mode 160000).
If that special entry path isn't referenced in the .gitmodule (like 'Classes/Support/Three...
Effect of NOLOCK hint in SELECT statements
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NOLOCK typically (depending on your DB engine) means give me your data, and I don't care what state it is in, and don't bother holding it still while you read from it. It is all at once faster, less resource-intensive, and very very dangerous.
You should be warned to never do an update from or ...
Get child node index
...mine a child node's index inside of its parent node without iterating over and comparing all children nodes?
11 Answers
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WCF on IIS8; *.svc handler mapping doesn't work
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More specifically:
Run Server Manager (on task bar and start menu)
Choose the server to administer (probably local server)
Scroll down to "Roles and Features" section.
Choose "Add Role or Feature" from Tasks drop down
On "Add Role or Feature Wizard" dialog, click down to "Fea...