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Efficiently convert rows to columns in sql server
...y to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
2 ...
Spring Boot - parent pom when you already have a parent pom
...rsion}</version>
</plugin>
and possibly include fail-fast plugin
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</ve...
When should I use cross apply over inner join?
...... that usually works, and often a good option as they can be indexed and fast, but performance can also drop due to to UPDATE statements not being parallel and not allowing to cascade formulas (reuse results) to update several fields within the same statement. And sometimes you'd just prefer to do...
C# 'is' operator performance
I have a program that requires fast performance. Within one of its inner loops, I need to test the type of an object to see whether it inherits from a certain interface.
...
How to create the perfect OOP application [closed]
...01% of the right answer is more than enough. If you want to figure out how fast a brick is falling after half a second, do the math in doubles. When you do financial arithemtic in doubles you end up with answers like the price after tax is 43.79999999999999 dollars and that just looks silly even tho...
When is it appropriate to use UDP instead of TCP? [closed]
...be different, but the UDP communication protocol is generally a little bit faster for us. The skeptical reader will rightly question whether we implemented everything correctly. Plus, what can you expect from a guy with a 2 digit rep? Nonetheless, I just now ran a test out of curiosity. The test...
How to search a specific value in all tables (PostgreSQL)?
...and the tuple ID (ctid), because that's simplest.
Here is a dead simple, fast and slightly dirty way:
CREATE OR REPLACE FUNCTION search_whole_db(_like_pattern text)
RETURNS TABLE(_tbl regclass, _ctid tid) AS
$func$
BEGIN
FOR _tbl IN
SELECT c.oid::regclass
FROM pg_class c
...
When to add what indexes in a table in Rails
...s from the web I would probably say YES, because it's always better to get fast responses, if it is for a background job and you need to save disk space you don't need to set it, but if the disk space is not an issue I would add an index anyway.
– jigfox
Mar 8 ...
Setting PayPal return URL and making it auto return?
.../btn/x-click-but01.gif" name="submit" alt="Make payments with PayPal - its fast, free and secure!">
</form>
kindly go through the fields notify_url, return, cancel_return
sample code for handling ipn (my_ipn.php) which is requested by paypal after payment has been made.
For more informa...
SQL Server indexes - ascending or descending, what difference does it make?
...e is even here. Using binary sort techniques, wouldn't a lookup be just as fast either way? What difference does it make which order I choose?
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