Transact SQL :: Want To Correct Database Design
Apr 29, 2015
I have below database already on one of the environment and its surprisingly designed somewhat in the past.now I want to correct it with one default filegroup with one primary and one log file, same time i am concerned for data as its production and no test environment is there, any way which ensure full consistency and steps i need to do...
CREATE
DATABASE [Sample]
ONÂ
PRIMARY
(
NAME =
N'Sample_Data',
[code]....
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Mar 22, 2004
Hey Everyone,
Just had a quick question for you . I have these 3 tables that are related in some way - below are the structures. I know the structures are correct and they work fine. However, I am using Visio Enterprise Architect to design these tables and when I try to generate the code, I get an error saying that it does not like the table with 2 fields as the primary key. And I just wanted to get feedback to find out whether I am correct or Visio is.
Table: Orders
Columns:
OrderID int PK
Name varchar(100)
Phone varchar(20)
Table: Products
Columns:
ProductID int PK
Name varchar(100)
Table: OrderLineItems
Columns:
OrderID int PK
ProductID int PK
Price money
Thanks for any feedback.
Johnny Dev
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Oct 5, 2015
We have two tables.Â
Table1:
Servers | Numbers
------------
Server1 | 1
Server1 | 2
Server1 | 3
Server2 | 1
Server2 | 2
Server2 | 4
Server3 | 2
Server3 | 5
Server3 | 9
Server3 | 7
.....
Table2:
     | Numbers
-----------
NULL | 1
NULL | 2
NULL | 3
I need to select Server1, Server2, Server3 and other servers that does not have correct value in Table2. Results should return server name and number that server does not have like:
Server2 | 3
Server3 | 1
Server3 | 3
Table1 is updated time to time, Table2 - static table. The best would be to avoid loop or cursor. Is that possible to get these results in one query?
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Aug 13, 2015
I am getting email from the end client and i need to validate in sql query.
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Aug 12, 2015
I have a table which is a configuration table, I have declared cursors whereby the cursor doesn't get to all the rows in the configuration table even though there is no where clause in the select statement and the cursor ought to loop/go through every single row. Changed the cursor to the below and it started to go through all rows.
DECLARE XXX CURSOR LOCAL FORWARD_ONLY STATIC READ_ONLY TYPE_WARNING FOR
Now with the definition above, I am now having a situation whereby a column in row 1 which is a bit data type and has a value of 0, then the cursor gets to row 2 the same column but with a value of 1 and an if statement in the cursor saying
IF @row2columnX = 0 set @myval = 99
For some reason within the cursor the IF statement is being implemented even though the value in row2 columnX is = 1
I find it so weird. Is there a database property that affects the way cursors react or is there something that I am doing incorrectly ? Lastly, I would like to have a simple cursor template which simply goes through a configuration table or any table.
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May 14, 2015
I am using a BCP format file to import a CSV file. The file looks like the following:
"01","02"
The format file looks like the following:
6.0Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
1Â Â Â Â Â Â SQLCHARÂ Â Â Â 0Â Â Â Â Â 0Â Â Â Â Â Â """Â Â Â Â Â Â Â Â 0Â Â Â ""
2Â Â Â Â Â SQLINTÂ Â Â Â Â Â 0Â Â Â Â Â 0Â Â Â Â Â Â "",""Â Â Â Â Â 1Â Â MROS
3Â Â Â Â Â SQLINTÂ Â Â Â Â Â 0Â Â Â Â Â 0Â Â Â Â Â Â ""
"Â Â Â 2Â Â MROF
When both the two fields are set to SQLCHAR data types the data imports successfully without the quotes as 01 and 02. These fields will always be numbers and I want them as integers so I set the data type to int in the database and SQLINT in the format file. The results was that the 01 became 12592 and the 02 became 12848. where these numbers are coming from?
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May 1, 2015
SQL Ver: 2008 (not r2)
Problem: The following code returns correct results when moving variable declarations and update statement outside a stored procedure, but fails to return a value other than zero for the "COMPANY TOTAL" records. The "DEPT TOTAL" result works fine both in and outside the sp.This may have to do with handling NULL values since I was getting warning message earlier involving a value being eliminated by an aggregate function involving a NULL. I only got this message when running inside the sp, not when running standalone. I wrapped the values inside the SUM functions with an ISNULL, and now return a zero rather than NULL for the "COMPANY TOTAL" records when running inside SP.All variable values are correct when running.
SQL CODE:
DECLAREÂ
    @WIPMonthCurrent date = (SELECT TOP 1 WIPMonth FROM budxcWIPMonths WHERE ActiveWIPPeriod = 'Y')
  select @WIPMonthCurrent as WIPMonthCurrent
 Â
[code]....
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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
-----------
fix_id
tem_id
homeorawayteam
goals
It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.
Fixture contains the details about the fixture like date and fixture id and has it been played
Team contains team info like team id, name, associated graphic
TeamFixture is the table which links the fixture to it's home and away team.
TeamFixture exists to prevent a many to many type relationship.
Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!
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Aug 3, 2015
With Sql Server Management Studio, while creating/modifying a table I want to specify one of its columns to store values in lower case only. Can it be done through the designer or by some other means?
N.B.: Using SQL Server 2005.
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Dec 26, 2007
hello,
After I FTP a ASP.NET website to a webserver, APP_DATA directory and all, I then use the SQL publishing wizard to create a script on the local machine and run the script on the webserver/SQL server, it builds ok. But I get an error "another database with the same name". Duplicate of the database in APP_DATA directory that is already attached by the connection string. So this isn't correct.
Second attempt: I FTP an ASP.NET website up to a server. Then I open the SQL management studio and attach the database in the website's APP_DATA folder. (never running a .sql script)The database attaches. The name of the database is the complete path to the database in the APP_DATA directory by default. The website functions. But if I try to look at a table I get an errors. It gets to the point the database will not even expand. Then I start getting errors in the browser that NETWORK SERVICE can not open it's default database. So the website fails also. So this doesn't work either....
So I guess my question is, should I remapped the path of |DataDirectory| before I FTP it? To a path where the other common system databases reside, (I don't think that would be necessary.) Then FTP the website without the contents of the app folder(no database). Then use the script built with the SQL Publishing wizard to build the database, and attach the database in SQL Management Studio? ( I'm afraid of over playing and corrupting the server).
If I attach the database to manage it and the connection string attaches the database to run it, will I always get errors? What am I missing here?
Thanks jamesqua for your help so far, I understood the blog you sent me too. But how do I modify it so I can use SQL Management studio to manage the database?
Once again from My Uncle Bob "Things are simply awful, or awfully simple"
-KK
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Sep 4, 2007
private void Page_Load(object sender, System.EventArgs e){ // Put user code to initialize the page here MemoryStream stream = new MemoryStream (); SqlConnection connection = new SqlConnection (@"..."); try { connection.Open (); SqlCommand command = new SqlCommand ("select Picture from Image", connection); byte[] image = (byte[]) command.ExecuteScalar (); stream.Write (image, 0, image.Length); Bitmap bitmap = new Bitmap (stream); Response.ContentType = "image/gif"; bitmap.Save (Response.OutputStream, ImageFormat.Gif); } finally { connection.Close (); stream.Close (); }
Error: byte[] image = (byte[]) command.ExecuteScalar ();
Unable to cast object of type 'System.Int32' to type 'System.Byte[]'.
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Jun 20, 2006
I work at a place which is currently running SQL 2000, but they areplanning to migrate to 2k5. I was thinking that this is the perfectopportunity to fix all the weaknesses we have had in our data model forthe longest: primary keys and foreign keys with different names, use ofcharacter columns for boolean fields, use of integer columns fortoggles, no referential integrity, etc.So, even if I create my Utopian perfect data model and modify all ofour data loaders to use it, our live website must use the old incorrectversion because there is way too much work involved in redoing thecode.My question then becomes: if I have a correct version, how easy andwith what approach would one take the data in the correct one andmirror it to the poorly designed schema?
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Oct 29, 2015
I actually work in an organisation and we have to find a solution about the data consistancy in the database. our partners use to send details to the organisation and inserted directly in the database, so we want to create a new database as a buffer database to insert informations from the partners then make an update to the main database. is there a better solution instead of that?
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Feb 24, 2006
Hello everyone,I have a webcontrol that uses database-structures alot, it uses the system tables in SQL to read column information from tables. To ease the load of the SQL server I have a property that stores this information in a cache and everything works fine.I am doing some research to find if there are anyway to get information from the SQL server that the structure from a table has changed.I want to know if a column or table has changed any values, like datatype, name, properties, etc.Any suggestions out there ?!
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Jul 23, 2005
I have a system that basically stores a database within a database (I'msure lots have you have done this before in some form or another).At the end of the day, I'm storing the actual data generically in acolumn of type nvarchar(4000), but I want to add support for unlimitedtext. I want to do this in a smart fashion. Right now I am leaningtowards putting 2 nullable Value fields:ValueLong ntext nullableValueShort nvarchar(4000) nullableand dynamically storing the info in one or the other depending on thesize. ASP.NET does this exact very thing in it's Session State model;look at the ASPStateTempSessions table. This table has both aSessionItemShort of type varbinary (7000) and a SessionItemLong of typeImage.My question is, is it better to user varbinary (7000) and Image? I'mthinking maybe I should go down this path, simply because ASP.NET does,but I don't really know why. Does anyone know what would be the benifitof using varbinary and Image datatypes? If it's just to allow saving ofbinary data, then I don't really need that right now (and I don't thinkASP.NET does either). Are there any other reasons?thanks,dave
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Aug 16, 2007
Hi All,Can u please suggest me some books for relational database design ordatabase modelling(Knowledgeable yet simple) i.e. from which we couldlearn database relationships(one to many,many to oneetc.....),building ER diagrams,proper usage of ER diagrams in ourdatabase(Primary key foreign key relations),designing smallmodules,relating tables and everything that relates about databasedesign....Coz I think database design is the crucial part of databaseand we must know the design part very first before starting up withdatabases.....Thanks and very grateful to all of you....Vikas
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Sep 27, 2007
Hi All,
I am designing database where few of the master tables will reside in different database or in case different server. Scenario is
Server "A" with Database "A" may host the "Accounts" table.
Server "B" with Database "B" may host the "Product" table.
I am designing database "Project" which will hosted in Server "A".
My application requires this master tables [readonly access] as data inserted in my application refers this tables. Also there are reports to be generated which refer this tables.
How do i design my database and sql queries?
I am thinking of approach of having equivalent tables created in my database and writing service which keep tables in my database in sync. This will ensure good perfomance during transaction and reports as they will need to refer this table locally as opposed to different database or different server.
Any thoughts on above approach?? or any better/standard way for such scenarios ?
Thanks in Advance. Your inputs will be of great help.
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Apr 12, 2007
Hello:
My client has a db with the following structure:
Online US Searchable Map of the 50 US States. Users search criteria is the following: Query records by selecting state, county, then record. Each County table has 10-20 tables. All databases combined = 500MB and TLogs = 100MB.
How would you re-design a relational DB where users could query data by state-county-record. Currenty the DB's are created by the County of each state which creates hundreds of DB's in SQLServer with no realtionship to each US state. What would be the best design to ensure good performance, data integrity and maintenance? Would you create 1 DB with all 50 states, create 4 DB's and divide by region(N,S,E,W), 50 DB's of each state or leave it as is with each county it's on DB? Any suggestions would be appreciated.
thx
rob
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Oct 20, 2006
Hello, I am designing my first database with 5 tables for a demo project and am not sure if it works. an example below.2 of the many things I want visitors to the site to do is find a company by the industry sector they belong to,..andwhat sort of service or products they can supply. For instance a Employment agency maybe under professional services Table 1 Customer Customer_ID = primary key,,,, Sector_ID = Foreign keyComapany Name, Address, Phone, Postcode etcTabel 2 Industry SectorsSector_ID = primary key,,,,Customer_ID= foreign key banking, Education,Prof Services, etc Table 3 Trading ActivityTrading_ID = primary key,,,,Sector_ID = Foreign key, Products_ID= FkEmployment Agent, School, Lawyer etcTable 4 ProductsProducts_ID = primary key,,,,Trading_ID = foreign keySupply frozen foods, transport services, sports goods, etc Table 5 Account Account_ID = primary key,,,,Customer_ID = foreign keyAccount Name, Credit Limit, Payment Terms, Open date, Account contact etc One big point of confusion is, can I have the Customer_ID from the principal Customers tablein every table as a foreign key or must the tables be chained together one after the other as such. Advice appreciatedThanks
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Apr 10, 2007
Hi,
I need a hand with designing a database.
I am collecting results from a survey which has the following questions:
Call ref? How did you place your support call? Were you satisfied with the amount of time you had to wait until getting acknowledgement of the support call placed? 1 = very satisfied and 10 = very unsatisfied. How happy were you with the customer service you received upon placing the support call? 1 = very unhappy and 10 = very happy.How satisfied were you with the amount of time you had to wait until you heard from an engineer? 1 = very satisfied and 10 = very unsatisfied. How satisfied were you with the time taken to get your problem/query resolved? 1 = very satisfied and 10 = very unsatisfied Did you feel the engineer had enough knowledge to deal with your call? 1 = very good and 10 = not very good Overall how satisfied were you with the support call placed? 1 = very satisfied and 10 = very unsatisfiedIs there anything we can do to improve the quality of the support and service you received?
I want to store this in a database. Obviously I want to use best practice for design, normalisation etc. The stumbling block I am coming accross is the fact that each question has a number and each question has a score from 1 to 10 and storing this in the database. Any help appreciated!
Thanks
Andrew
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Apr 26, 2007
I am creating database tables for company testimonials. Database columns: name, position, companyname, comment, service we provided.
My question is that for each company - may have a multitude of different services from us, and different people with different positions in the same company may make comments.
What is best practice for putting this db structure together?
Thanks
Andrew
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Oct 29, 2007
Can anyone tell me how can i design database architecture for the Table Category & Product...so that i can make N-level entity relation....I have database in SQL SERVER 2000.
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Jan 30, 2008
I guess I am confused about something and need some help. I am looking at a database schema for about 20 tables in a database. I noticed that the firstcolumn in each table Is some type of Id. For example StudentId,TestId etc.Where the Id is a unique numeric sequential value.
So I have some questions?1- Do these Id's act as what are called indexes for the table?(Unique indexes)2- If the answer to 1 is correct, then how do I create these unique indexes? Is it as simple as declaring the Id column as the primary key and that this value will be generated automatically upon insert? 3- Is it necessary to have an Id column for every table, or may I only do it for a few of them?4. In relation to Question2, what do I need to do, so that the Id column will automatically be created when someone inserts a value into the database table with an ID column.
For example here are two sample tables
StudentsInfo
StudentId<PK> Name Age 1 Mark 33 2 Jill 23 3 Mary 25
PersonalInfo
Name<FK> SocialSecurity Address MajorMark 324-444-3342 15 Elm ArtJill 888-888-8998 21 North ScienceMary 876-777-2344 18 Byle Music
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Apr 17, 2008
Hi,I am planning to create a technical forum for our college. could any one give me an idea of how to design the database for the forum. what table and columns i should have?
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Nov 3, 2004
I have got a design issue.I have got 4 tables,having relationships.Now,user will edit records and save them,but I want to save the values which were exixsting before they were edited and saved.Implying,if a record is edited 50 times,then the values of each edit needs to be saved.How best ,can I achieve this.
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Oct 20, 2005
Hi !!We are designing a system where we ask people for their interests and store in into the database and send customize email. Following are the questions:1) Should we use Identity column as Primary Key and CustomerID column? OR we should create Custom CustomerID and use it as Primary Key? (I have read few articles about Identity column as Primary or not Primary, but need little advice what to accept)2) We have a Tables called : Interest & Customer_InterestCustomer Table:CustomerID, Customer Name, Address, Email, Signup DateInterest Table:InterestID, InterestNameCustomer_Interest: (Need suggestion for How to design this)Should Table be design like:Option1: CustomerID, InterestIDOption2: CustomerID, Interest1, Interest2, Interest3, Interest4i.e.Lets Say: Customer table has CustomerA, CustomerB, CustomerCInterest table has Interest I1, I2, I3, I4Lets Say CustomerA Signedup for Interest I1, I2, I3 and CustomerB signed up I1, I4As per Option1:Customer_Interest Table witll haveCustomerA, I1CustomerA, I2CustomerA, I3CustomerB, I1CustomerB, I4ORAs per Option2Customer_Interest (Where Interest Column is bit column..... 1 = Signed up, 0 = Not Signed upCustomerA, 1, 1, 1, 0CustomerB, 1, 0, 0, 1Which way we should design? 3) If we select Option2, and if we are displaying data in ASP.NET Page, will there be any issue if we use 3 tier architecture?Thanks !!!
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Nov 10, 2005
I am designing an inventory database in which I need some help, I have the following entities:ItemsNotebookWireless CardADSL Modemetc...ModelsAcer centrino 1.6Acer centrino 1.733COM 4x125 hours Wi-fi access50 hours Wi-fi accessetc... PackagesPackage A:Acer centrino 1.63COM 4x125 hours Wi-fi accessPackage B:Acer centrino 1.733COM 4x150 hours Wi-fi accessI made a table for the items having the following fields: Item_ID, Item_Nameand another for the Models having: Model_ID, Model_Name, Item_Type(Foreign Key to Items table)up to this point is this correct?About the packages table, I don't know if it is correct to have a field for each model (one for notebook, other for modem, and other for wireless card) like this it would be like having 3 foreign keys to the same table but nothing distinguishes themI don't know how to relate the packages and the models table.Any recommendations for a proper design for those entities?
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Dec 20, 2005
I am creating a knowledge base. I want the user to be able to choose a category such as Hardware, Software, Etc. then I want them to be able to choose what type of software such as word, excel, ets.
It will then display in a gridview problems, solutions, submitted by, last updated, and review date.
The gridview will allow users to update solutions and I would also like the ability for technicians to be able to add new Problems/solutions.
What would be the best way to handle this?
Any tips are appreciated.
Rick
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May 2, 2000
I have requirement to create table of 100 columns. Should i create 100 columns in one table or i should create three coulmn table with column id, column desc, column value with 1 row in 100 column table = 100 row in 3 column table. Which will be faster & efficient in performance, io & size.
Thanks
Manoj
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Dec 13, 2000
The database will provide content management for an Intranet site.
On the site we have a number of articles which are categorised. Each categories can also have sub-categories.
The relationships would seem to be
Category---->Sub-Category----->Article
A category has one or mant sub-categories. A sub-category has one or many articles.
However some categories have articles but are no sub-categories.
Should I create a further relationship between Category and Article to cater for this instance or should their be a dummy category record in this instance?
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Sep 30, 2002
Hi everbody!!!
i first would like to congratulate this forum for the new member!!! ME ;)
Then i have this question, i´m going to design a database in SQL server and i would like to have some basic hint how to build it up.
It´s a calender for a ASP.Net site i´m building and for the moment it´s just 4 things to have in mind
-users
-dates
-todo´s
-birthdays
If something is unclaer then PLEASE ask me!!
Thanx in advance icaaq
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Dec 24, 2002
Hi all:
I am designing a sql server database to keep track of patient history and data about various diseases. Is there a book or any kind of resource that I can refer? Any help is appreciated.
Thanks,
ndba
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