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CROSS JOIN vs INNER JOIN in SQL
...e result:
Cross join
select * from table1 cross join table2 where table1.id = table2.fk_id
Inner join
select * from table1 join table2 on table1.id = table2.fk_id
Use the last method
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Declaring a custom android UI element using XML
How do I declare an Android UI element using XML?
6 Answers
6
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How to sort a NSArray alphabetically?
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The simplest approach is, to provide a sort selector (Apple's documentation for details)
Objective-C
sortedArray = [anArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
Swift
let descriptor: NSSortDescriptor = NSSortDescriptor(...
PHP Redirect with POST data
I did some research on this topic, and there are some experts who have said that it is not possible , so I would like to ask for an alternative solution.
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Set custom HTML5 required field validation message
I have one form with many input fields. I have put html5 validations
11 Answers
11
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Unknown Column In Where Clause
... edited Oct 29 '15 at 9:44
idmean
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answered Sep 30 '08 at 15:41
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Should functions return null or an empty object?
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Returning null is usually the best idea if you intend to indicate that no data is available.
An empty object implies data has been returned, whereas returning null clearly indicates that nothing has been returned.
Additionally, returning a null will result ...
Web workers without a separate Javascript file?
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Full example of BLOB inline worker:
<!DOCTYPE html>
<script id="worker1" type="javascript/worker">
// This script won't be parsed by JS engines because its type is javascript/worker.
self.onmessage = function(e) {
self.postMessage('msg from worker');
};
// Rest of your ...
How do I get a raw, compiled SQL query from a SQLAlchemy expression?
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This blog provides an updated answer.
Quoting from the blog post, this is suggested and worked for me.
>>> from sqlalchemy.dialects import postgresql
>>> print str(q.statement.compile(dialect=postgresql.dialect()))
Wh...
Copy values from one column to another in the same table
...ific set of rows:
UPDATE `products` SET `in_stock` = true WHERE `supplier_id` = 10
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