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I'm building a new application that had a table (Tbl1) with 4 date fields in it. Lets call them date1, date2, date3, date4 and the DBA wants me to remove them. He is telling me that it is ineffecient to have 4 date feilds in my table. He wanted me to break them out into two other tables one with the dateType and one with the date itself. I told him that the performance difference will be negligable but it will be easier for me to code. I want to pull back all four dates in one record anyway, so why do I have to break them out. Is it really bad design to have a date field that allows nulls?
how vital enterprise application are for proactive organizations leveraging collective synergy to think outside the box and formulate their key objectives into a win-win game plan with a quality-driven approach that focuses on empowering key players to drive-up their core competencies and increase expectations with an all-around initiative to drive up the bottom-line. But of course, that's all a "high level" overview of things
--thedailywtf 3/21/06
-- modified at 8:41 Wednesday 14th June, 2006
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ToddHileHoffer wrote: Is it really bad design to have a date field that allows nulls?
No.
The main question is what do the dates represent? If date1..date4 represent a continuation of the same thing then it may be better normalised to pull that out to a separate table. If they represent separate things then leave them where they are.
[ADDITION]
And using a performance argument on a DBA is virtually an exercise in pointlessness. In my experience they are hyper on normalisation to the detriment of everything else.
[/ADDITION]
[ADDITION2]
Damn! I just realised I've now got a dual role. I've recently joined a new company and I'm primarily a developer, but I'm also a DBA... GET THAT TABLE NORMALISED MAN!!! JUMP TO IT!!!! JUMP TO IT!!!
[/ADDITION2]
Scottish Developers upcoming sessions include:
.NET debugging, tracing and instrumentation by Duncan Edwards Jones and Code Coverage in .NET by Craig Murphy
My: Website | Blog
-- modified at 11:40 Wednesday 14th June, 2006
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Colin Angus Mackay wrote: GET THAT TABLE NORMALISED MAN!!! JUMP TO IT!!!! JUMP TO IT!!!
----------
Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
- Laurence J. Peters
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Thanks for the reply, yhey are all different, it is for an insurance ap. It is DateSubmitted, DateQuoted, DateBound, DateDeclined. I saw no point in breaking them out. I know either dateBound or dateDeclined will be null, but I don't care. It is just easier to code.
how vital enterprise application are for proactive organizations leveraging collective synergy to think outside the box and formulate their key objectives into a win-win game plan with a quality-driven approach that focuses on empowering key players to drive-up their core competencies and increase expectations with an all-around initiative to drive up the bottom-line. But of course, that's all a "high level" overview of things
--thedailywtf 3/21/06
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Hi all,
I create a application that use SQL to store documents like picture files, sound files...Should i use image data type to store these files or just the path to the file or something else? please help me to figure out the best solution. Thank in advance!
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Sure you have to use Image datatype.
The Image data type can store up to 2GB of binary data, which also enables it to store standard text data.
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Thank albCode, but can you compare the performance btw 2 solutions:
1. Store the whole file in Image datatype field.
2. Store the path to the file only.
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You need to think about how youe application will be used. Storing the file will make queries etc a lot slower but in some cases it may be the only way. If you store the path only then each client will need to be able to access that path (typically using a mapped drive).
So if you are using a purely server based application like a web app or even a small LAN based client server application storingthe path may be best.
Jon
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If you use SQL2005 you should use varbinary(max). image should not be used any more.
Rainer Stropek
Visit my blog at http://www.cubido.at/rainers
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Have got any one source,example or link about Full Text Search Services in SQL Server 2005.I have been searched that but i found all in sql server 2000...
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hi to all,
I create a web application in asp.net with sql server 2000, I use always close connection in .net code as my consern but when run my application then visit page to page give a error "General network error " message . then i check lots of connection is sleeping state in process info in sql manegment(current activity) Now i open the particular processId in Process info show open connection with any storeprocedure name and show .net sqlclient data provoider referance as open connection which is fetch the data from sql then i check in code find really the connection which is got data by that store procedure is not close properly and i close it. This is ok but one problem is that some procesId show blank info with .net sql client data provoider. so how can i find where these conneciton is open in my applicaton because this processId doesn't give any clue for it , it show nothing only blank but status is sleeping. If any help have this context then quick feedback.
Thanks
hi_arv
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I am working on getting data out of a datagrid, and save it to a SQL data base. I have the following code:
// Create parameters for the QA_Setup dataset via Sqlcommand
SqlCommand cmd = new SqlCommand();
// Define the params for each column in QA_SetUp
// cmd.Parameters.Add("@CompanyName", SqlDbType.VarChar, 50, ds.Tables("CompanyName").column("CompanyName"));
cmd.Parameters.Add("@CompanyName", SqlDbType.VarChar, 50, "CompanyName");
cmd.Parameters.Add("@CompanyCode", SqlDbType.VarChar, 50, "CompanyCode");
cmd.Parameters.Add("@InspectionPrefix", SqlDbType.VarChar, 50, "InspectionPrefix");
cmd.Parameters.Add("@TestPrefix", SqlDbType.VarChar, 50, "TestPrefix");
cmd.Parameters.Add("@DefectPrefix", SqlDbType.VarChar, 50, "DefectPrefix");
cmd.Parameters.Add("@AuditTrail", SqlDbType.Bit, 1, "AuditTrail");
//define connection and stored proc name
cmd.Connection = conn;
cmd.CommandText = sproc;
// call insert command for the cmd
dap.InsertCommand = cmd;
When I run the app I and try and save I get a syntax error(System.Data.SQLClient.SQLException) as follows:
Line1: Incorrect Syntax near 'prc_QA_Setup_ins'. This is the sproc name that is passed in. Not sure what my issue is, any idea?
the sproc is declared as string sproc="prc_QA_Setup_ins"; which is passed over to my DAL which is where the code above resides.
-- modified at 21:52 Tuesday 13th June, 2006
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Perfect it was the cmd.CommandType = CommandType.StoredProcedure line that I was missing... thanks!
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hi,
i need to deploy a database with several replications on about 500 machines. does anybody has an idea how to manage or automate that process?
thanks in advance.
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Hello!
I have a website and a standalone aplication, both written in C#. This applications are both using the same database. The problem is that if i start the standalone application and then I close it (or not), the web page is throwing an SQL Exception : "can't connect to physical file ****.mdf .... it is used by another process" or something like that. The only solution is to restart the SQL server. If I start the website first the same thing is happening with the standalone application. The only thing I can do is to restart the SQL server on and on after each use of one of this 2 application. What could be the problem? What can I do?
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What does your connection string look like? Is this SQL Server or SQL Express?
Jim Conigliaro
jconigliaro@ieee.org
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my connection string:
"Data Source=82.208.150.83,1419;Initial Catalog=D:\\WWW\\ADMINISTRARE\\APP_DATA\\LICENTA.MDF;User ID=sa;Password=pass"
it is SQL Express
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I can't say that I've personally had this problem, but I do know of people that have had issues with SQL Express and they have almost always been fixed by changing the connection string. Try using the following connection string:
"DataSource=<MACHINENAME>;AttachDbFilename=<file>;User ID=<user>; Password=<password>;User Instance=false"
or
"DataSource=.\SQLExpress;AttachDbFilename=<file>;User ID=<user>; Password=<password>;User Instance=false"
Jim Conigliaro
jconigliaro@ieee.org
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what the meaning of QUOTED_IDENTIFIER ,ANSI_NULLS in this view(sqlserver 2000)
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
-
-select *.........
--
-
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
vivek
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HI all
I have 50 tables in my database
In 50 tables the fields are same(Name,year,date these 3 fields only)
Now i want write query to retrive all 50 tables information in 1 QUERY
Can any one plz help me
THX
asdfasdfasdfasdfasdfasdfasdfasdfasdfasdf
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Hi!
You can generate the query you need using the following SQL-Statement:
select 'select [name], [year], [date] from '+table_schema+'.'
+table_name+' union all '
from INFORMATION_SCHEMA.TABLES
Execute this statement with result type = text, copy the result to a new query windoe and delete the last "union all". It will give you a union all of all your tables -> your 50 tables combined into one.
Hope this helps.
Regards,
Rainer
Rainer Stropek
Visit my blog at http://www.cubido.at/rainers
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HI
Both of u THX for replying
My problum is
i have an query to search and display
so i given query like this
select name from '" & textbox1.text & "' where date = ''....
table name come from textbox which is enter by client.
now i want to do is to i have to remove the client textbox.
And
by date or any thing i have search the names which is in 50 tables
50 table names i have to display
PLZ help me
THX
asdfasdfasdfasdfasdfasdfasdfasdfasdfasdf
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