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How do I remove the first characters of a specific column in a table?
In SQL, how can I remove the first 4 characters of values of a specific column in a table? Column name is Student Code and an example value is ABCD123Stu1231 .
I want to remove first 4 chars from my table for all records
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What does the variable $this mean in PHP?
... created by the interpreter for you, that contains an array of variables.
If you call $this inside a normal method in a normal class, $this returns the Object (the class) to which that method belongs.
It's possible for $this to be undefined if the context has no parent Object.
php.net has a b...
Correct way to use get_or_create?
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FYI created is a boolean. True if created, False if it is fetched
– Josh
Oct 4 '18 at 8:45
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How can I make pandas dataframe column headers all lowercase?
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If you want to do the rename using a chained method call, you can use
data.rename(
columns=unicode.lower
)
(Python 2)
or
data.rename(
columns=str.lower
)
(Python 3)
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How do I cast a variable in Scala?
...2D] method, but with greater flexibility. For example, you could provide different branches for various types, effectively performing multiple conditional casts at the same time. Finally, you don't really need to throw an exception in the catch-all area, you could also return null (or preferably, ...
Explain the encapsulated anonymous function syntax
...ork because it is being parsed as a FunctionDeclaration, and the name identifier of function declarations is mandatory.
When you surround it with parentheses it is evaluated as a FunctionExpression, and function expressions can be named or not.
The grammar of a FunctionDeclaration looks like this:...
JVM option -Xss - What does it do exactly?
... is used to hold return addresses, function/method call arguments, etc. So if a thread tends to process large structures via recursive algorithms, it may need a large stack for all those return addresses and such. With the Sun JVM, you can set that size via that parameter.
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What are naming conventions for MongoDB?
...fficial documentation mentions you may use underscores, also built-in identifier is named _id (but this may be be to indicate that _id is intended to be private, internal, never displayed or edited.
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How to set java_home on Windows 7?
...swered Jun 11 '10 at 17:04
fogedifogedi
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Show percent % instead of counts in charts of categorical variables
... information currently housed in comments on the accepted answer.
Remark: If hp is not set as a factor, ggplot returns:
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