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How do I obtain a Query Execution Plan in SQL Server?
...rosoft.com/sqlserver/2004/07/showplan' as sql),
CTE
as (SELECT CAST(TextData AS VARCHAR(MAX)) AS TextData,
ObjectID,
ObjectName,
EventSequence,
/*costs accumulate up the tree so the MAX should be the root*/
M...
How do I get the parent directory in Python?
...is an entire RFC 1808 written to address the issue of relative path in URI and all the subtlety of the presence and absence of a trailing /. If you know of any documentation that says they should be treated equivalent in general please point it out.
– Wai Yip Tung
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How to include (source) R script in other scripts
... answered Jun 23 '11 at 15:30
AndrieAndrie
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How do I test a private function or a class that has private methods, fields or inner classes?
..., z);
foo.privateField = value;
This way your code remains type-safe and readable. No design compromises, no overexposing methods and fields for the sake of tests.
If you have somewhat of a legacy Java application, and you're not allowed to change the visibility of your methods, the best wa...
SQLAlchemy: how to filter date field?
...this might be obvious to some - this ONLY works because the func.date does CAST on the column which removes the time from equation => this does NOT mean range with the time! This only works when time is NOT in the column - you must CAST it to Date like this, or make the column Date, once it's Dat...
What is boxing and unboxing and what are the trade offs?
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from C# 3.0 In a Nutshell:
Boxing is the act of casting a value
type into a reference type:
int x = 9;
object o = x; // boxing the int
unboxing is... the reverse:
// unboxing o
object o = 9;
int x = (int)o;
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How do I list all files of a directory?
How can I list all files of a directory in Python and add them to a list ?
21 Answers
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SQL NVARCHAR and VARCHAR Limits
... the length of the varchar(n) string is greater than 4,000 characters the cast will be to nvarchar(4000) and truncation will occur.
Datatypes of string literals
If you use the N prefix and the string is <= 4,000 characters long it will be typed as nvarchar(n) where n is the length of the string...
List files ONLY in the current directory
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Just use os.listdir and os.path.isfile instead of os.walk.
Example:
import os
files = [f for f in os.listdir('.') if os.path.isfile(f)]
for f in files:
# do something
But be careful while applying this to other directory, like
files ...
What is the difference between int, Int16, Int32 and Int64?
...ample works that way: the first literal 1, the 2, and the 3 are implicitly cast to short to fit them in the array, while the second literal 1 is left as an ordinary int. (int)1 is not considered equal to (short)1, (short)2, (short)3, thus the result is -1.
– user565869
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