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How can strings be concatenated?
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To concatenate strings in python you use the "+" sign
ref: http://www.gidnetwork.com/b-40.html
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How to use index in select statement?
Lets say in the employee table, I have created an index(idx_name) on the emp_name column of the table.
8 Answers
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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
... parent table that holds the
central data values, and a child table with identical values pointing
back to its parent. The FOREIGN KEY clause is specified in the child
table.
It will reject any INSERT or UPDATE operation that attempts to create
a foreign key value in a child table if th...
How do I keep jQuery UI Accordion collapsed by default?
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What does “Receiver type 'CALayer' for instance message is a forward declaration” mean here?
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java get file size efficiently
...297.044
URL sum: 95534, per Iteration: 382.136
File must be caching the calls to the filesystem, while channels and URL have some overhead.
Code:
import java.io.*;
import java.net.*;
import java.util.*;
public enum FileSizeBench {
LENGTH {
@Override
public long getResult()...
Purpose of Unions in C and C++
... as "not valid" and "undefined" isn't really sufficient if I'm going to be called upon to understand code that works in this exact way.
– T.E.D.
Jul 15 '13 at 18:38
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Why is Lisp used for AI? [closed]
... McCarthy wrote Lisp and was a very influential Computer Scientist, specifically in the field of AI. Naturally, a lot of his work was implemented in Lisp, and thus Lisp gained a foothold.
– cha0site
Apr 9 '12 at 18:30
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OOP vs Functional Programming vs Procedural [closed]
...ny given situation? strengths and weaknesses, pros and cons, whatever you call them they do exist! I'm not saying one is inherently better, and neither did you. I believe that is what you really were trying to say. unless you really believe any chosen approach doesn't have positives and negative...
Good way to use table alias in Update statement?
...mValue
FROM dbo.Rates ra
INNER JOIN dbo.Rates rb
ON ra.ResourceID = rb.ResourceID
WHERE ra.PriceSched = 't8'
AND rb.PriceSched = 't9';
This might help in improving performance.
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