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by: Michael Drumheller |
last post by:
(If you're not interested in NumArray, please skip this message.)
I am new to NumArray and I wonder if someone can help me with
array-indexing. Here's the basic situation: Given a rank-2 array
(i.e., a matrix) it seems to be trivial, with array indexing,
to extract a subset of its *columns*. But it does not seem
to be trivial to extract a subset of its *rows*. The code
snippet below describes the problem (if it really is a problem)...
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by: steve |
last post by:
To gain performance, do I need to index ALL the fields in the where
clause.
Say we have a query like:
select stuff from table where field1=.. and field2=...
If field1 selection substantially reduces the number of records
selected, do we really need to index field2 as well.
In other words, does the query first subselect from the first argumet,
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by: inline_four |
last post by:
If I have a table with multiple foreign keys to various other tables,
what's the best way to index them: one index that contains all of
those columns, or multiple indexes containing one foreign key column
each. Don't know if this makes a difference, but my foreign keys are
not explicitly defined as such in the schema and most of them are
nullable.
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by: Danny |
last post by:
sorry for posting a question that has probably been posted hundreds of
times, but i can't seem to find the answer i need...We're using a Sql
Server 7.0 database and recently started getting timeout expired
errors on our views, which i'm assuming is due to the volume of
records in our tables. Unfortunately i'm not too experiences w/
indexing tables, so my question is:
1) how do you determine which fields to index (does it have to be a...
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by: Daniel Roy |
last post by:
Hi guys,
I've been playing with this query for about a week now, and I still
can't find ways to speed it up. It runs for about 5 minutes. The only
table (among the 41) with significant amount of data is dbo.S_EVT_ACT,
which contains about 900,000 records. The query is automatically
generated by Siebel, and therefore not really modifiable. And hints
are not really possible. While looking at the exec plan, we can see
that what takes so long...
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by: Bryan Olson |
last post by:
The Python slice type has one method 'indices', and reportedly:
This method takes a single integer argument /length/ and
computes information about the extended slice that the slice
object would describe if applied to a sequence of length
items. It returns a tuple of three integers; respectively
these are the /start/ and /stop/ indices and the /step/ or
stride length of the slice. Missing or out-of-bounds indices
are handled in a manner...
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by: John Sidney-Woollett |
last post by:
Hi
I'm building a web app where changes to customer orders are logged in the
following table, and I worried about the time that it will take to locate
records that need further processing/actioning. Here's the table:
create table CUSTOMER.WCCustOrderStatusLog (
WCCustOrderID integer,
WCOrderStatusID integer,
-- date/time at which some process acknowledged the status
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by: Chung Leong |
last post by:
Here's the rest of the tutorial I started earlier:
Aside from text within a document, Indexing Service let you search on
meta information stored in the files. For example, MusicArtist and
MusicAlbum let you find MP3 and other music files based on the singer
and album name; DocAuthor let you find Office documents created by a
certain user; DocAppName let you find files of a particular program,
and so on.
Indexing Service uses plug-ins...
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by: Amar |
last post by:
Hi All,
I need to select data from a database table containing huge amount of
data. Now I am storing data using one primary key and I am just using
simple select statement, and this process gives me the output but it is
taking long to execute the query. As much I had heared I want to use
some indexing or cluster indexing which might help me but I am not so
familiar with these things. So if any one having some solutions to
execute the...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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