Your Opinion On Design

Mar 2, 2000

Hi,
I need your suggestions on a design issue:

I have 2 tables, Customers and Organizations. 1 Customer can be under many organizations. What would be the best way to design the db (2 choices) for performance (around 50000 customers):
1)
-Customer table
-Organization table
-Link Organization & Customer by creating a new tables with the following structure ---> CustomerID, OrgID,

2)
-A Customer tables that has a field called OrgID where the orgID is stored. If the customer has more organization related to him, we add another customer record and we put the new OrgID in the OrgID column. Examples:

Customer Table
--------------
CustomerID--Fname--Lname--Addresss-----OrgID
---------------------------------------------
1 Bob Marley 33 Africa org1
1 Bob Marley 33 Africa org2
1 Bob Marley 33 Africa org3

Please give me your suggestions,

Thank you for your time,

SASAN

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Need Opinion About This Design Thread

Apr 13, 2007

Hi all,
I am having problem with SQL connection at Godaddy where my pool connection gets MAX OUT. When it happens, I cannot access the database.This is the thread about the problem: http://forums.asp.net/thread/1665023.aspx
I just created this with "THREAD". I hope someone who has experiences with thread can give me some advice about my design. This is my first time.
 
static object Locked = new object();
public object ExecuteCommand(string queryStr, string type){     //*************************************************************************************//     // ExecuteCommand: Returns an object //    //*************************************************************************************//     Thread t = null;     lock(Locked)     {          SQLString = queryStr;                    switch(type)          {               case "ExecuteNonQuery":                   t = new Thread(ExecuteNonQuery);                   break;               case "ExecuteScalar":                    t = new Thread(ExecuteScalar);                    break;               case "GetDataReader":                    t = new Thread(GetDataReader);                    break;          }             t.Start();          t.Join();     }     return null;}
First of, does this work at all? It runs, but is it a good design in term of Thread? Since I use LOCK, do I still need the t.Join() function? The switch with the three cases, is that OKAY? Basically, I'm clueless. If you read my other post, you will get an idea what I'm trying to do. Any feedback would be very very appreciated.
Thank you.

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Need Another Opinion (Database Design)

May 8, 2007

I need some other opinions on whether or not this is considered a proper database design structure.

Here is the relationship...We have PEOPLE, that each can belong to a COMPANY.

PERSON_TABLE
Person_ID
Company_ID

COMPANY_TABLE
Company_ID

Then each person can trust other people of other companies, but can only trust 1 person per company.

My question is this. In order to maintain a constraint of 1 person per company, is it considered OK to add a the redundant column Company_ID to the PERSON_TRUSTED_TABLE(and then creating a composite primary key on the Person_ID/Company_ID) instead of just adding a trigger to the PERSON_TRUSTED_TABLE to uphold the constraint.

PERSON_TRUSTED_TABLE
Person_ID
Trusted_Company_ID
Trusted_Person_ID

I would appreciate anyone's opinion. Thanks so much!

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Opinion Requested: Multi-Table Design

Dec 23, 2004

I have about a 35000 record table. There are about 14 entries in this table that relate to "sections". Each of these sections can have up to 20 values. This lends itself to a design like:


big_table [one-to-one] big_table_has_sections [many-to-many] sections


or, more concretely:


BuildingConstructionType
relates to
ConstructionHasTypes
relates to
Types


Where BuildingConstructionType is one of 14 fields in the 35000 record "big" table, ConstructionHasTypes is the one-to-one intermediary relation that relates many-to-many with Types (the sections).

Unfortunately, with 35000 records, this big_table_has_sections seems like it might bloat. Is this a good solution?

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Opinion About Design Needed (splitting String Data)

Dec 14, 2006

Hi to everyone,My problem is, that I'm not so quite sure, which way should I go.The user is inputing by second part application a long string (let'ssay 128 characters), which are separated by semiclon.Example:A20;BU;AC40;MA50;E;E;IC;GREENNow: each from this position, is already defined in any other table, asa separate record. These are the keys lets say. It means, a have someproperities for A20, BU, aso.Because this long inputed string, is a property of device (whih alsohas a lot of different properities) I could do two different ways ofstoring data:1. By writing, in SP, just encapsulate each of the position separatedby semicolon, and write into a different table with index of device,and the position in long stirng nearly in this way:Major device data tableID AnyData1 AnyData2 ... AnyData3123 MZD12 XX77 .... any comment text124 MZD13 XY55 ... any other commentString data Tablefk_deviceId position value123 1 A20123 2 BU123 3 AC40.....123 8 GREENThe device table, contains also a pointer (position), which mightchange, to "hglight" specified position.Then, I can very easly find all necessary data. The problem is, I needto move the device record data (from other table) very often into otherhistory table (by each update). That will mean, that I also need tomove all these records from 1 -8 for example to a separate historytable, holding the index for a history device dataset. This is a littleinconvinience in this, and in my opinion, it will use to much storagedata, and by programming, I need always to shift this properities intohistory table, whith indexes to a history table of other properities.2. Table will be build nearly in this way:Major device data tableID AnyData1 AnyData2 ... AnyData3 stringProperty pointer123 MZD12 XX77 .... any comment text A20;BU;AC40;MA50;E;E;IC;GREEN 3124 MZD13 XY55 ... any other comment A20;BU;AC40;MA50;E;E;IC;GREEN 2By writng into device table, there will be just a additional field forthis string, and I will have a function, which according to specifiedpointer, will get me the string part on the fly, while I need it.This will not require the other table, and will reduce the amout ofdata, not a lot ... but always.This solution, has a inconvinance, that it will be not so fast doing asearch over the part of this strings, while there will be no real indexon this.If I woould like to search all devices, by which the curent pointervalue is equal GREEN, then I need to use function for getting thevalue, and this one will be not indexed, means, by a lot amount ofdata, might be slow.I would like to know Your opinion about booth solutions.Also, if you might point me the other problems with any of thissolution, I might not have noticed.With Best RegardsMatik

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Opinion

Sep 15, 2005

I have 2 tables:
Table 1 has:ID,FName,Lname
Table2 has:ID,PID,PFName,PLName, Flag
PID is a unique number -> (hh:mm:ss)
I need to run an update to table2 by setting the Flag to 1 and also creating PID.
I could use a join query to do this, but I am concern about PID (hh:mm:ss), because it may take less then 1 second to update and I will have duplicate PID.
Any idea what is the best way of doing this?

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I Got Into This..i Just Need Your Opinion

Nov 14, 2007

Well, its kind of tricky, and i got into this.For example i have a column of zip, all US city state name and abbreviation, preffered name and an alternate name of each city in US, and also non-acceptable name of each preffered name..

Can you give me a hint, how many databse should i used?
for example, i search for a zip code, and the result will be the name of city or an acceptable name of city and there are non-acceptable name too..

well.i just need your opinion..hope you could get into this one.tnx

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Nov 3, 2005

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Jan 7, 2004

What is the better practice when joining tables in a query example 1 or 2? I've always joined tables together like example 2, but it seems that many people are advocates of example 1. Are there any differences performance wise between the two?

Example 1:
SELECT *
FROM authors AS a INNER JOIN publishers AS p
ON a.city = p.city
ORDER BY a.au_lname DESC

Example 2:
SELECT *
FROM authors AS a, publishers AS p
WHERE a.city = p.city
ORDER BY a.au_lname DESC

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Dec 18, 2007

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A friend of mine who owns a computer store just quoted me for a dual quad-core Xeon 5405 2GHz system with Windows Server 2003 10 Cals. I'm concerned about the following:
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2005, likely Express Edition) on the computer. Does SQL Server
have the capability to make use of all cores? Otherwise, why
spend more for Xeon and so many cores instead of a single
C2D running at a faster speed of say 3GHz ?
- What would be the advantage of using a Windows Server over
Windows XP in a peer-to-peer configuration? I don't buy into
the 10 connection limit because the TCPIP.sys file can be
altered to move that limit up, so 14 stations does not trigger
the need for Windows Server in and of itself.

Thanks all!

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Feb 7, 2008

Hi,

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Jun 4, 2007

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http://weblogs.asp.net/alex_papadimoulis/archive/2005/10/20/428014.aspx



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Apr 25, 2006

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Later in the code we have the statement

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The table BillingOptions does have a field called 'BillActualRoom' and it is a bit.

My question is this: Does this SQL statement make any sense at all? (My gut reaction is no but I'd like a second opinion. Can't get any consensus in the office.)

I would think that putting a local variable in like this would mean that @BillActualRoom is always equal to 0.

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Mar 21, 2003

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May 26, 2004

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Feb 27, 2004

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Any suggestions on how to handle this situation?

Thanks, Dave

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Jul 30, 2007

Hi,

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Logon
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Thread
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Thread
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LEFT OUTER JOIN
Message
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Just curious,

-Ryan

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Jul 20, 2005

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Jul 1, 2007

Dear friends,

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http://pedrocgd.blogspot.com/2007/07/ssis-dataflow-performance-i.html

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Apr 30, 2007

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Oct 26, 2007

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May 13, 2015

I have a scenario like below

Product1
Product2 Product3
Product4 Product5
Product1 1
1 0 0
1
Product2 1
1 0 0
1
Product3 0
0 1 1
0
Product4 0
0 1 1
0
Product5 1
1 0 0
1

How to design tables in SQL Server for the above.

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Feb 13, 2002

Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:

-------
Fixture
-------
fix_id
fix_date
fix_played

----
Team
----
tem_id
tem_name

-----------
TeamFixture
-----------
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tem_id
homeorawayteam
goals

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Aug 18, 2015

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Product name   :  
Nestle milk |
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CTN, NOs
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Nov 7, 2003

Hi all.

I'm going to create a big DB that will hold important info
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I wonder where should I use the IDENTITY field,
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(and where does SQL server the numbers of a deleted records)


My fear is that IDENTITY fields will go wrong somehow so I can
loose connections within the tables
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1. When should I use IDENTITY field ?

2. If I do NOT - how can I lock a record when I add a new one

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Jan 13, 2004

Hi,

I have 7 web forms wizard. after the user edit the fields, I need to keep a history log of the changed data only.

I am thinking of the following structure

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Where field_id is a number indicates the changed field.
for example 1> First Name, 2> Last Name etc

Where transaction is ADD, DELETE, EDIT

Also i need to keep history of the details
for example an enterprise has 10 branches.
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NY, 1000
MD, 500

My log table will look like this
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1, 1, 1, , Mick ,John , EDIT
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3, 1, 3, ,MD , , DELETE
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5, 1, 3, , ,NV , ADD
6, 1, 4, , ,700 , ADD


Is there a better way to log changes?

Thanks

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Jan 16, 2004

I'm going to create a hardware/software inventory program to keep track on all the computers at the office. This program should be able to search the database using queries like "all computers with a cpu faster than 500Mhz".

I want some tips on my database design.

One solution is to create columns for each piece of hardware, i.e. cpu, ram, hdd etc etc. Then just run simple SELECT queries against them. The problem is that a computer may have many HDDs/CDs etc, and also other type of equipment may be entered in the database like switches and routers.

Another solution is to specify the valuetype + value in one table having a relation to another table containing the actual machines/routers/switches. The problem here is that I can't do numeric comparisons this way since "11" is less than "2", ("all computers with a cpu faster than 500Mhz").

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Feb 10, 2004

Table A
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Table B
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Table C
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Program A creates the records for Table C. In the process it reads from Table A and Table B.

Program B reads record from Table C. Program B now needs [SalesmanEmail] field.

The suggestion is to add [SalesmanEmail] to Table C. Is this good or bad design?

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Oct 15, 2004

hello,

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Oct 27, 2007

I think I might have dug myself in a hole here, so could use some advice on database design.

Currently, I have a table that records meeting minutes. The design is:


Code:

minutesid | int | 4 | no nulls
minutescat | varchar | 255 | allow nulls
minutesnotes | text | 16 | allow nulls


What this does is set up a minutes category, such as "Members Present", and the notes for that category, such as "Mrs. Peacock, Mr. Green, Professor Plum, Colonel Mustard, Miss Scarlett". Each individual category has it's own ID.

I need to develop an archive of each of the minutes. So if there are 15 categories and associated notes for the 15 OCT 2007 meeting, how can I design the archive table to include all of those categories and notes into one record for 15 OCT 2007, then for 15 NOV 2007 and so on ...?

Hope that makes sense. Thanks in advance ...

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Sep 21, 2007

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Thanx in advance.

Premal.

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Design DB

Mar 26, 2008

Hi,

I need to design a database, but i i just don know if i am doing it correctly.

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I want to keep this readings in a database, and this database will be updated constantly.

Should i create all of this different gauges readings in one big single table? If i do so, i only have one long row of data then for a particular equipment.If i put in different table, i can't see how i can create relationship among my tables with such kind of data.

Can you help on the possible ways of putting this equipment real time readings into DB?

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Mar 12, 2004

I am trying to create a database that is used to create/store estimates for a manufacturing company. There are many things to consider in this estimate but I will isolate this question to the takeoff itself:

There are several categories in which costs are estimated and they are as follows : Product(s), Site Work, Transportation (Shipping), Field Materials, etc...

Should each of the above have their own "Takeoff" table, or would using one table and a gategory table be a better way to go?

Mike B

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