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SQL - find records from one table which don't exist in another
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There's several different ways of doing this, with varying efficiency, depending on how good your query optimiser is, and the relative size of your two tables:
This is the shortest statement, and may be quickest if your phone book is very short:
SELECT *
FROM Call
W...
Bat file to run a .exe at the command prompt
I want to create a .bat file so I can just click on it so it can run:
11 Answers
11
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What's the best way to check if a String represents an integer in Java?
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If you are not concerned with potential overflow problems this function will perform about 20-30 times faster than using Integer.parseInt().
public static boolean isInteger(String str) {
if (str == null) {
return false;
}
int leng...
What's wrong with this 1988 C code?
...ile this piece of code from the book "The C Programming Language" (K & R). It is a bare-bones version of the UNIX program wc :
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Convert a list to a string in C#
...indedString = string.Join( ",", myList.ToArray() );
You can replace "," with what you want to split the elements in the list by.
Edit: As mention in the comments you could also do
string combindedString = string.Join( ",", myList);
Reference:
Join<T>(String, IEnumerable<T>)
Conca...
Is it possible to install another version of Python to Virtualenv?
... web-hosting that has Python 2.4 installed, but my code is not compatible with 2.4. Is it possible to install Python 2.6 directly to Virtualenv?
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Resolve build errors due to circular dependency amongst classes
I often find myself in a situation where I am facing multiple compilation/linker errors in a C++ project due to some bad design decisions (made by someone else :) ) which lead to circular dependencies between C++ classes in different header files (can happen also in the same file) . But fortunately...
How to use DISTINCT and ORDER BY in same SELECT statement?
...something like this:
SELECT DISTINCT Category, MAX(CreationDate)
FROM MonitoringJob
GROUP BY Category
ORDER BY MAX(CreationDate) DESC, Category
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Remove Project from Android Studio
...ow how to remove a project from Android Studio in an attempt to re- export it from Eclipse?
14 Answers
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Difference between Convert.ToString() and .ToString()
...follow
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edited Jul 19 '18 at 14:15
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