Dear all,
Does anyone know the maximum amount of columns of a table in a database? Currently, I am using SQL Server 2005. [*1] Is it normal to have 50 columns in a table? I wonder about the optimization of query processing. [*2]Should I split them into several tables to optimize query processing time? [*3]But if I split them, will it guarantee that my query processing time will be faster? As we know, if we split it into several tables, there must be tables relationship that will effect query processing time. [*4]Should I use index for important fields in the tables?
[*4]What is the normal amount of columns in a table that will keep query processing time high? How can we investigate it? Maybe you have good ideas.
1  1593 
Does anyone know the maximum amount of columns of a table in a database? Currently, I am using SQL Server 2005. [*1] Is it normal to have 50 columns in a table? I wonder about the optimization of query processing. [*2]Should I split them into several tables to optimize query processing time? [*3]But if I split them, will it guarantee that my query processing time will be faster? As we know, if we split it into several tables, there must be tables relationship that will effect query processing time. [*4]Should I use index for important fields in the tables?
[*4]What is the normal amount of columns in a table that will keep query processing time high? How can we investigate it? Maybe you have good ideas.
From BOL:Maximum Capacity Specifications for SQL Server 2005
maxmum columns = 1024
I have frequently > 100 columns per table
Split into multiple tables (normalize) as much as possible, smaller tablestructures are faster.
One pont of view is to create an index for each combination of columns in a where statement. Remember, too many unused indexes decrease Insert/Update statements
Sign in to post your reply or Sign up for a free account.
Similar topics | |
by: ArShAm |
last post by:
Hi there
Please help me to optimize this code for speed
I added /O2 to compiler settings
I added /Oe to compiler settings for accepting register type request , but
it seems that is not allowed and if I remove register type for "l" , time of
generating codes doesn't change
the original code makes some files , but I removed that section to make it
simple for you to read
please help me to optimize it for faster running
|
by: John |
last post by:
I'm developing an application for medical use that will be used to
capture patient background and visit data. The application will have
approximately 50 forms, with an average of about 20 fields each-- so a
total of 1000+ fields. Almost always, the fields are unique to a
particular form--and it will be pretty unlikely that new forms and
fields will be added--although not out of the realm of possibility.
There will also be a search...
|
by: unixman |
last post by:
As usual, it is 2:00am, and I'm pulling my hair out, finally resorting to
posting in the newsgroups for help. :)
Simple problem, in theory.
Given table "map":
CREATE TABLE map (
entry_id int(10) unsigned NOT NULL auto_increment,
piece_id int(10) unsigned NOT NULL default '0',
|
by: Kums |
last post by:
What is the maximum permissible size of a database? Is there any limitation.
What is the maximum # of tablespace's allowed in a database?
Thanks for your response.
|
by: Shelby |
last post by:
Problem: My company generates its own data export from a propietary
database. These (free) tables can be read in C#.NET using a Visual FoxPro
driver (vfpoledb). I can read each of the six tables into its own datatable,
modify them, and add them to a dataset. It take approximately 15 minutes to
pass that dataset to Crystal Reports (45 minutes if the report uses three
subreport datasets). Then it takes over 7 hours for Crystal to...
| | |
by: shsandeep |
last post by:
The ETL application loaded around 3000 rows in 14 seconds in a Development
database while it took 2 hours to load in a UAT database.
UAT db is partitioned.
Dev db is not partitioned.
the application looks for existing rows in the table...if they already
exist then it updates otherwise inserts them.
The table is pretty large, around 6.5 million rows.
|
by: igovada |
last post by:
Hi
I have a table (Sql server 2000) which has 14 cost columns for each record, and now due to a new requirement, I have 2 taxes which needs to be applied on two more fields called Share1 and share 2
e.g
Sales tax = 10%
Use Tax = 10%
Share1 = 60%
Share2 = 40%
So Sales tax Amt (A) = Cost1 * Share1 * Sales Tax
|
by: Pachalo |
last post by:
I would like to add data to a database using text Boxes and l should be able to retrieve that data into a datagrid
So far l have managed to create a connection between a datagrid and the data base but am failling to have that connection between the text boxes and the database.
So far this is the scenerio:
l have an
OleDbConnection
an OleDbDataAdapter
|
by: programmerx101 |
last post by:
Ok, I'm looking for expert advice on this one.
I have a database which keeps going into read_only mode. Sometimes it goes into read_only / single user mode. Once it was taken offline completely. This seemingly happens randomly. Out of all of the database I have worked with, this has happened on 3 of them - several times randomly to each. All three of the databases that have exhibited this behaviour have been databases I have written for the...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
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,...
| | |
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...
|
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...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
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();...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| | |
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...
| |
