For a year and a half now, we have been developing different Access
2000 applications. Most of them are access frontend and access
backends. Some of them have SQL server 2000 as a backend. There is one
application, which consists of a frontend and 3 backend mdb's.
Different companies (80) are using the application:
1. Companies with just one pc and one user.
2. Companies with a Cytrix environment.
3. Companies with Normal network (pc's with WIN 2000, XP, 98, etc).
Recently another company wanted to use the application and this
company has over 50 users and multiple locations. The first thing that
came into my mind was: "let's make another version of the application
with SQL server 2000 as backend", BUT the thing is, we actually just
want one frontend which can communicate with (with normal performance
ofcourse) both the access backend and the sql server backend. This
way, we don't have to solve problems in 2 frontends, but just in one.
My question is, is there anybody who has tried making an access
frontend being able to talk to different kind of backends?
The database adminsitrator decided that we use access as frontend for the SQL server which is very annoying because I have a hard time figuring out how to perform certain actions such as drop table queries and so. I have written my own little frontend in coldfusion but I rather work with access for security reasons.
My question:
does anyone have experience with using access as frontend and knows how to use it effectively, or knows where to get a manual? (or even better, a better frontend)
we are having performance problems with a pure MS Access database across a WAN. As a test we want to setup a MSSQL server , move the data to the server and run the MS Access clients through a ODBC interface. The application uses much SQL methods to get the data ( docmd.runsql commands ). Only a few native queries are used.
Will this help the performance ? If not , what do i need to do to get a better performance ? It is a lot of work to build a new application so if it is possible whith the existing code it would be very nice .
I have a database with a sql backend and an access frontend. I put it in a folder on the network for users to access. First, they were getting errors like not being able to access the database if someone else had it open and not being able to perform certain functionality. It was suggested that i put a mde on each of the users pc. i gave them all access to their own front ends on the folder because they use different pcs. this solved the problem. however, i need a way to perform updates without manually creating mdes for every user. i used to work for a co that there was one mde was put into a folder on the network with a config file. The users access the database through CITRIX. Whenever they accessed the shortcut on the server, it created the users their own front end. Whenever we need to provide updates, we simply made a new mde from the mdb and whenever the user accessed the database again, they would have the latest mde and it would created an update frontend for the user. Does anyone know of such an utility or know what I am referring too? I encounted several suggestions like a batch file; but they refer to putting the file and the mde on each users pc. This is not how i'm set up. Thanks
I am using Sql server 7.0.When i insert or update a record in a table,i need to show a message in the front end ,that one record is added to the table. I have written the queries for insertion and updation into the table in a storedprocdure. Is there any way to return something from a storedprodure ,so that i can show a message in the frontend, that a record is updated by someone..the updation will be done in one machine(clerk's machine in bank) and the message should be shown in another machine(manger's machine in bank) who has more administrative power on the system. does 'alert' in sql server help this. Delphi is my frontend.
Hello. I have an Access 97 frontend and a SQL 7 backend. When I try to open up the linked SQL tables in the frontend I recieve the error " This recordset is not updatable" from Access. I have the permissions in SQL set at this point to public having all permissions but it still does not change my problem. Does anyone know the answer?
Hi All, I have recently migrated from Access to SQL Server. I have come across a strange problem. I have got a table in my database whihc is not linked to any other table, but does include data and is used from time to time for reports. It is more used as a sort of lookup table. Now I had the frontend in Access and I have retained it. So I connect all the SQL Server tables via ODBC to Access. The problem with this table is for some reason it wont allow to add new records on Access side. You can just view the contents, but cannot add anything to it e.g a new record, etc. I tried giving explicit permissions of Select, Insert, update, etc. but still no result. There are other look up tables as well, that have the same problem. Can anybody tell me why this is so and is there any way to fix it?
My company is currently using access to manage equipment in 4-5 different locations. I want to move this to a sql database and have a front-end to do the same thing access is doing now.
Should I use access as a front-end or should I develop a custom front end using vb?
Just a fyi 5-7 tables 7-9 queries 10 or so reports and the front end is currently a switchboard that links to many other forms.
I am creating a Access frontend to some SQL Server Tables. One of these tables has an int type field and several money type fields. I am trying to populate the table based on text boxes on an Access form. Because of other reasons instead of just using the SQL table as the record source of the form I am using "INSERT INTO" statements to update the data.
Here is my problem if I leave the textfields that are supposed to populate the int and money fields blank I get an syntax error message on the INSERT statement. If I populate the textfields with a 0 the INSERT works fine.
The int field and money fields are defined to accept nulls so why is the blank textfield generating an error message instead of inserting a null into the table?
Any help or guidance would be greatly appreciated.
I have a website which runs off a Access database which I am currentlyconverting to sql server database. I would like to still use my accessfront end for reporting and queries..I created an odbc connection on my computer to the remote sql serverand created a link in access to my sql server tables. All my report andQueries run fine I just have one problem it keeps on prompting me forther password of the remote sqlserver database. I check the odbcconnection and I see the password is not saved in there even though Iput it in. Is there a way I can have the password saved. I do not wantkeep on having to enter the password.
I have a ms acssess db acting as a frontend to a Sql Server 2005 db. I have need to have the db setup as a standalone to distribute with the application for times when the 2005 server is unreachable. I have a created CE db that replicates the 2005 version.
What I want to do now is put the CE db on the desktop with the MS access frontend. Based on a user's preferences the connection would direct to the CE version.
The CE engine is loaded on the desktop, I have modified the ADODb connection string to point to the CE db. When I run it I get an error that says: "The provider can't be found. It may not be properly installed."
Here's the connection string:cnxn: ConnectionString = "Provider=microsoft.sqlserver.mobile.oledb.3.1;Data Source=spcd.sdf;User ID=;Password=;"
Am I trying to do something that just isn't going to happen?
Ok, little frustrated hence the excessive exclamation points.
I'm designing a database in access to use a sql backend. Table structures are setup and am creating a view to join multiple tables together for data entry purposes. Tables are joined properly but when I add more than one join, ie adding more than two tables, I can't add records!?!
I checked the joins, it's not the table, since if I add one table its ok, remove table, add another table and that works, but when I add both tables together, it prevents me from adding records!
And another thing, when I have just two tables joined together and add a record, it comes up with this save changes, drop changes or cancel thingie!!! WTF!!!?
Is there something simple i'm missing or is it my table structure????
Hi, this is my first post (hopefully of many) on this board. Just wanted to say a quick hello before I dive into my question. :)
As the title suggested, I have to develop a MS Access form app (yes, it has to be Access - I know it sucks) that will post and query data to and from a remote SQL Server db. While I have no problem linking the two through the default ODBC drivers, my question is security. Some (actually most all) of the data being passed back and forth is sensative information, and I would like to know the best way to keep it safe.
If anybody has any suggestions, instructions, or can redirect me to a good FAQ site on the subject, I would be most appreciative. I have already done a search on these forums for an answer, but have sadly come up short.
I have a sql server 2005 db. Is there anyway I can link access to be used as a frontend by my client for viewing the data? is this possible through linked table manager?
Hi! I am evaluating an architecture for one of our project... a SQL database containing the data (backend) and a second database containing the development code (frontend) linked to the backend with synonyms.
It enables to upgrade the code without touching the data. Or to change the backend / use a different set of data at will.
Everything was going fine, the behavior was expected to be EXACTLY the same with synonyms as with real tables. But I came accross a problem: Let's say we have a synonym (frontend) dbo.TABLE1 that points to a table (backend) with a IDENTITY column.
I have a sp (frontend) with the following code: INSERT INTO dbo.TABLE1... SELECT @SCOPE_IDENTITY = SCOPE_IDENTITY()
Well in that case, @SCOPE_IDENTITY is NULL!
Anyone has ever faced that problem? Should I use another function to return the last ID inserted? Or is it the backend/frontend architecture that is completely flawed? I also heard there's a way, by creating the tables and the code on different filegroups, to restore only the tables or the code...
We are new Access users and trying to take our database live...here are some of the problems we're facing.
When we split our Access database into a Backend and Frontends, a couple of strange things happened in the Frontend: 1.) When we run our queries, multiple copies of the same record are displayed (this is wrong). 2.) When we look at those queries in design view, the field names are preceded by Expr1, Expr2, Expr3, etc.
We have a large number of queries. How can we fix this problem?
Also, if anyone knows any websites or resources that can help us understand what things like Expr1 mean (a reference) that would be helpful too!
We are not a very advanced group of access users and are trying to split our database for a research study...here is our question:
When we split our Access database into a Backend and Frontends, a couple of strange things happened in the Frontend: 1.) When we run our queries, multiple copies of the same record are displayed (this is wrong). 2.) When we look at those queries in design view, the field names are preceded by Expr1, Expr2, Expr3, etc.
We have a large number of queries. How can we fix this problem?
Also if anyone has a good source for trouble shooting this or simmilar difficulties we'd appriciate any spots or advice.
Hi,Simple question: A customer has an application using Access 2000frontend and SQL Server 2000 backend. Data connection is over ODBC.There are almost 250 concurrent users and is growing. Have theysqueezed everything out of Access? Should the move to a VB.Net frontendtaken place ages ago?CheersMike
We are using an Access 2000 project to view our SQL Tables and using Access 2000 Runtime to Access the forms in the project. We have written in a locking system in VB and removed the video controls to prevent users from accessing the same records. But of course now we need to make the video controls available. This has now thrown up the problem of multiple users accessing the same records. We have tried to write code to lock records when then video controls are used but this is not working as well as we hoped. Can anyone please suggest any way of setting up locking on SQL using triggers from the Access frontend? or any other types of locking systems that could be written in the Access front end.
This is nutty. I never got this error on my local machine. The only lower case m in the sql is by near the variable Ratingsum like in line 59. [SqlException (0x80131904): Incorrect syntax near 'm'.An expression of non-boolean type specified in a context where a condition is expected, near 'type'.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +925466 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +800118 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +186 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1932 System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) +196 System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +269 System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +135 view_full_article.btnRating_Click(Object Src, EventArgs E) +565 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107 System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746</pre></code> Here is my button click sub in its entirety: 1 Sub btnRating_Click(ByVal Src As Object, ByVal E As EventArgs) 2 'Variable declarations... 3 Dim articleid As Integer 4 articleid = Request.QueryString("aid") 5 Dim strSelectQuery, strInsertQuery As String 6 Dim strCon As String 7 Dim conMyConnection As New System.Data.SqlClient.SqlConnection() 8 Dim cmdMyCommand As New System.Data.SqlClient.SqlCommand() 9 Dim dtrMyDataReader As System.Data.SqlClient.SqlDataReader 10 Dim MyHttpAppObject As System.Web.HttpContext = _ 11 System.Web.HttpContext.Current 12 Dim strRemoteAddress As String 13 Dim intSelectedRating, intCount As Integer 14 Dim Ratingvalues As Decimal 15 Dim Ratingnums As Decimal 16 Dim Stars As Decimal 17 Dim Comments As String 18 Dim active As Boolean = False 19 Me.lblRating.Text = "" 20 'Get the user's ip address and cast its type to string... 21 strRemoteAddress = CStr(MyHttpAppObject.Request.UserHostAddress) 22 'Build the query string. This time check to see if IP address has already rated this ID. 23 strSelectQuery = "SELECT COUNT(*) As RatingCount " 24 strSelectQuery += "FROM tblArticleRating WHERE Itemid=" & articleid 25 strSelectQuery += " AND ip = '" & strRemoteAddress & "'" 26 'Open the connection, and execute the query... 27 strCon = System.Web.Configuration.WebConfigurationManager.ConnectionStrings("sqlConnectionString").ConnectionString 28 conMyConnection.ConnectionString = strCon 29 conMyConnection.Open() 30 cmdMyCommand.Connection = conMyConnection 31 cmdMyCommand.CommandType = System.Data.CommandType.Text 32 cmdMyCommand.CommandText = strSelectQuery 33 intCount = cmdMyCommand.ExecuteScalar() 34 intSelectedRating = Int(Me.rbRating.Text) 35 conMyConnection.Close() 36 'Close the connection to release these resources... 37 38 If intCount = 0 Then 'The user hasn't rated the article 39 'before, so perform the insert... 40 strInsertQuery = "INSERT INTO tblArticleRating (rating, ip, itemID, comment, active) " 41 strInsertQuery += "VALUES (" 42 strInsertQuery += intSelectedRating & ", '" 43 strInsertQuery += strRemoteAddress & "', " 44 strInsertQuery += articleid & ", '" 45 strInsertQuery += comment.Text & "', '" 46 strInsertQuery += active & "'); " 47 cmdMyCommand.CommandText = strInsertQuery 48 conMyConnection.Open() 49 cmdMyCommand.ExecuteNonQuery() 50 conMyConnection.Close() 51 Me.lblRating.Text = "Thanks for your vote!" 52 Comments = comment.Text.ToString 53 54 If Len(Comments) > 0 Then 55 emailadmin(comment.Text, articleid) 56 End If 57 'now update the article db for the two values but first get the correct ratings for the article 58 strSelectQuery = _ 59 "SELECT SUM(rating) As RatingSum, COUNT(*) As RatingCount " 60 strSelectQuery += "FROM tblArticleRating WHERE Itemid=" & articleid 61 conMyConnection.Open() 62 cmdMyCommand.CommandText = strSelectQuery 63 dtrMyDataReader = cmdMyCommand.ExecuteReader() 64 dtrMyDataReader.Read() 65 Ratingvalues = Convert.ToDecimal(dtrMyDataReader("RatingSum").ToString) 66 Ratingnums = Convert.ToDecimal(dtrMyDataReader("RatingCount").ToString) 67 Stars = Ratingvalues / Ratingnums 68 conMyConnection.Close() 69 'Response.Write("Values: " & Ratingvalues) 70 'Response.Write("Votes: " & Ratingnums) 71 72 UpdateRating(articleid, Stars, Ratingnums) 73 Else 'The user has rated the article before, so display a message... 74 Me.lblRating.Text = "You've already rated this article" 75 End If 76 strSelectQuery = _ 77 "SELECT SUM(rating) As RatingSum, COUNT(*) As RatingCount " 78 strSelectQuery += "FROM tblArticleRating WHERE Itemid=" & articleid 79 conMyConnection.Open() 80 cmdMyCommand.CommandText = strSelectQuery 81 dtrMyDataReader = cmdMyCommand.ExecuteReader() 82 dtrMyDataReader.Read() 83 Ratingvalues = Convert.ToDecimal(dtrMyDataReader("RatingSum").ToString) 84 Ratingnums = Convert.ToDecimal(dtrMyDataReader("RatingCount").ToString) 85 Stars = Ratingvalues / Ratingnums 86 If (Ratingnums = 1) And (Stars <= 1) Then 87 lblRatingCount.Text =" (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Vote" 88 ElseIf (Ratingnums = 1) And (Stars > 1) Then 89 lblRatingCount.Text = " (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Vote" 90 ElseIf (Ratingnums > 1) And (Stars <= 1) Then 91 lblRatingCount.Text =" (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Votes" 92 ElseIf (Ratingnums > 1) And (Stars > 1) Then 93 lblRatingCount.Text = " (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Votes" 94 End If 95 96 'Response.Write(String.Format("{0:f2}", Stars)) 97 'Response.Write("Values: " & Ratingvalues) 98 'Response.Write("Votes: " & Ratingnums) 99 If (Stars > 0) And (Stars <= 0.5) Then 100 Me.Rating.ImageUrl ="./images/rating/05star.gif" 101 ElseIf (Stars > 0.5) And (Stars < 1.0) Then 102 Me.Rating.ImageUrl = "./images/rating/05star.gif" 103 ElseIf (Stars >= 1.0) And (Stars < 1.5) Then 104 Me.Rating.ImageUrl = "./images/rating/1star.gif" 105 ElseIf (Stars >= 1.5) And (Stars < 2.0) Then 106 Me.Rating.ImageUrl = "./images/rating/15star.gif" 107 ElseIf (Stars >= 2.0) And (Stars < 2.5) Then 108 Me.Rating.ImageUrl = "./images/rating/2star.gif" 109 ElseIf (Stars >= 2.5) And (Stars < 3.0) Then 110 Me.Rating.ImageUrl = "./images/rating/25star.gif" 111 ElseIf (Stars >= 3.0) And (Stars < 3.5) Then 112 Me.Rating.ImageUrl = "./images/rating/3star.gif" 113 ElseIf (Stars >= 3.5) And (Stars < 4.0) Then 114 Me.Rating.ImageUrl = "./images/rating/35star.gif" 115 ElseIf (Stars >= 4.0) And (Stars < 4.5) Then 116 Me.Rating.ImageUrl = "./images/rating/4star.gif" 117 ElseIf (Stars >= 4.5) And (Stars < 5.0) Then 118 Me.Rating.ImageUrl = "./images/rating/45star.gif" 119 ElseIf (Stars >= 4.5) And (Stars <= 5.0) Then 120 Me.Rating.ImageUrl = "./images/rating/5star.gif" 121 End If 122 dtrMyDataReader.Close() 123 conMyConnection.Close() 124 End Sub
If you want to reduplicate the error, click over here and try to submit a rating: http://www.link-exchangers.com/view_full_article.aspx?aid=51 Thanks for helping me figure this out.
Happy Friday! A while since I have posted a question, and this one is probably real easy. I am trying to store numeric values from a php form in MSSQL 2000 database. However, the columns are set to float and if the value is 1.00, when entered into the table it is saved as 1
If I change the column type to money, the query fails, with an error message of conversion of datatype varchar to datatype money statement terminated.
anybody know what I need to do? do I need to do something in my query to specify that this is NOT varchar data?
I like to define my procedure parameter type to match a referenced table colum type, similar to PL/SQL "table.column%type" notation. That way, when the table column is changes, I would not have to change my stored proc. Any suggestion?
The table in SQL has column Availability Decimal (8,8)
Code in c# using sqlbulkcopy trying to insert values like 0.0000, 0.9999, 29.999 into the field Availability we tried the datatype float , but it is converting values to scientific expressions€¦(eg: 8E-05) and the values displayed in reports are scientifc expressions which is not expected we need to store values as is
Error: base {System.SystemException} = {"The given value of type SqlDecimal from the data source cannot be converted to type decimal of the specified target column."}
"System.InvalidOperationException: The given value of type SqlDecimal from the data source cannot be converted to type decimal of the specified target column. ---> System.InvalidOperationException: The given value of type SqlDecimal from the data source cannot be converted to type decimal of the specified target column. ---> System.ArgumentException: Parameter value '1.0000' is out of range. --- End of inner exception stack trace --- at System.Data.SqlClient.SqlBulkCopy.ConvertValue(Object value, _SqlMetaData metadata) --- End of inner exception stack trace --- at System.Data.SqlClient.SqlBulkCopy.ConvertValue(Object value, _SqlMetaData metadata) at System.Data.SqlClient.SqlBulkCopy.WriteToServerInternal() at System.Data.SqlClient.SqlBulkCopy.WriteRowSourceToServer(Int32 columnCount) at System.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table, DataRowState rowState) at System.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table) at MS.Internal.MS COM.AggregateRealTimeDataToSQL.SqlHelper.InsertDataIntoAppServerAvailPerMinute(String data, String appName, Int32 dateID, Int32 timeID) in C:\VSTS\MXPS Shared Services\RealTimeMonitoring\AggregateRealTimeDataToSQL\SQLHelper.cs:line 269"
Code in C#
SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnection, SqlBulkCopyOptions.Default); DataRow dr; DataTable dt = new DataTable(); DataColumn dc;
try {
dc = dt.Columns.Add("Availability", typeof(decimal)); €¦.
dr["Availability"] = Convert.ToDecimal(s[2]); ------ I tried SqlDecimal €¦€¦€¦.
Implement time interval type in the form of a user defined type in SS2k8r2? Specifically an interval type described in the book Temporal Data and the Relational Model by C. J. Date at all. As an example, an interval is below:
1/4/2006:1/10/2006
which would mean the time period from 1/4 to 1/10.
I am trying to use the Bulk Insert Task to load from a csv file. My final column is a bit that is nullable. My file is an ID column that is int, a date column that is mm/dd/yyy, then 20 columns that are real, and a final column that is bit. I've tried various combinations of codepage and datafiletype on my task component. When I have RAW with Char, I get the error included below. If I change to RAW/Native or codepage 1252, I don't have an issue with the bit; however, errors start generating on the ID and date columns.
I have tried various data type settings on my flat file connection, too. I have tried DT_BOOL and the integer datatypes. Nothing seems to work.
I hope someone can help me work through this.
Thanks in advance,
SK
SSIS package "Package3.dtsx" starting.
Error: 0xC002F304 at Bulk Insert Task, Bulk Insert Task: An error occurred with the following error message: "Cannot fetch a row from OLE DB provider "BULK" for linked server "(null)".The OLE DB provider "BULK" for linked server "(null)" reported an error. The provider did not give any information about the error.The bulk load failed. The column is too long in the data file for row 1, column 24. Verify that the field terminator and row terminator are specified correctly.Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 1, column 23 (cancelled).".
Error: 0xC002F304 at Bulk Insert Task 1, Bulk Insert Task: An error occurred with the following error message: "Cannot fetch a row from OLE DB provider "BULK" for linked server "(null)".The OLE DB provider "BULK" for linked server "(null)" reported an error. The provider did not give any information about the error.The bulk load failed. The column is too long in the data file for row 1, column 24. Verify that the field terminator and row terminator are specified correctly.Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 1, column 23 (cancelled).".
Task failed: Bulk Insert Task 1
Task failed: Bulk Insert Task
Warning: 0x80019002 at Package3: The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Hi all, I am developing ASP.NET 1.1 application using VB.NET & SQL Server, on my machine I am using SQL Server 2000, and everything is working just fine. The problem appears when I uploaded the site to the Host, they are using SQL Server 2005, is there any reason for this, I am using casting in the code, and I am sure there is something wrong with the hosting settings. Any suggestions. Best Regards Wafi Mohtaseb
Hello Friends How are you?? Friends i am getting problem in SQL Server 2005. I am deployng web application on production server as well as Databse also. In production server i inserted new field in all tables which is rowguid and its type is uniqueidentifier. The default binding for this field is newsequentialid(). In some pages it works ok but in some places it generates error like 'Conversion from type 'DBNull' to type 'String' is not valid'. Can anybody help me to solve this problem. Its urgent so plz reply me as soon as possible. I'll be very thankfull to you. Thanks in Advance. Regards,
I have extensively revied both of the design methodologies and I cannot come up with a single clear reason to use one over the other!
Type - Attributes is where you have a table holding the type categories, type, a table holding the type attributes expected and then a table holding the type attribute value:
Now the above sure is flexible in the sence that a type of automobile can be added without affecting the database schema, but was if some attributes do not take a numeric value? How do you handle computations on attributes specific attributes? Why would I use this structure as opposed to the super type - sub type as shown below?
Now, adding new sub types probably isn't very flexible but, now you can specify data types for each attribute instead of using sql_variant, which by the documentation cannot be used in aggregate functions and may render poor result when used with ADO.
Regardless of the method used, alot of back end coding is required for computations, what table to send the attributes, etc...
Can anyone please help me clarify. What method is best and why. So far I am leaning for option 2. More work but seems to be more flexible in the sence of customization of each datatype.
E.G., what if you wanted to specify attributes about the cap that can be supplied to trucks?
I'm trying to use the SSIS Execute SQL Task to pull XML from a SQL 2005 database table. The SQL is of the following form:
SELECT (
SELECT MT.MessageId 'MessageId', MT.MessageType 'MessageType', FROM MessageTable MT ORDER BY MT.messageid desc FOR XML PATH('MessageStatus'), TYPE
) FOR XML PATH('Report'), TYPE
For some reason I can only get this query to work if I use an ADO.NET connection type. If I try to use something like the OLEDB connection I get the following error:
<ROOT><?MSSQLError HResult="0x80004005" Source="Microsoft XML Extensions to SQL Server" Description="No description provided"?></ROOT>
Can anyone tell me why the SELECT ... FOR XML PATH... seems only to work with ADO.NET connections?
I am having a UDT problem. When I run the Create Type command. I receive the "could not find type" error. I have seen other posts on here related to the default namespace in VB.NET. When I add the namespace I receive "Incorrect syntax near '.'." What is the format of the EXTERNAL NAME parameter. Thanks for any help. Code below...
Incorrect Syntax Error:
DROP ASSEMBLY CadSqlUdtsCREATE ASSEMBLY CadSqlUdtsAUTHORIZATION [dbo]FROM 'E:CAD.NETCADUDTsReleaseCadSqlUdts.dll'WITH PERMISSION_SET = SAFEGOCREATE TYPE dbo.ReportingAreaUDTEXTERNAL NAME CadSqlUdts.[CadSqlUdts.CadSqlUdts].ReportingAreaUDT;GO
Could Not Find Type Error:
DROP ASSEMBLY CadSqlUdtsCREATE ASSEMBLY CadSqlUdtsAUTHORIZATION [dbo]FROM 'E:CAD.NETCADUDTsReleaseCadSqlUdts.dll'WITH PERMISSION_SET = SAFEGOCREATE TYPE dbo.ReportingAreaUDTEXTERNAL NAME CadSqlUdts.ReportingAreaUDT;GO What's up??
