|
I am using MS Access 2007 and asp .net 2.0.When my application runs,an error occurs."Number of query srtings and destination values are not matched".I googled a lot.But didnt find any solution.when the data are inserted to the table,this error occured.I didnt use any primary key in table.
|
|
|
|
|
Is your situation is like this[^]
|
|
|
|
|
I have to call function to print numbers. For Example if I pass 5 as parameter function has to return
1
2
3
4
5
Is declaring Temp table and Get this result is good way? Is there any alternate
|
|
|
|
|
Here it is
DECLARE @InputValue INT
SET @InputValue=3
DECLARE @PrintValue INT
SET @PrintValue=1
WHILE @InputValue > 0
BEGIN
PRINT @PrintValue
SET @PrintValue=@PrintValue+1
SET @InputValue=@InputValue-1
END
I Love T-SQL
"Don't torture yourself,let the life to do it for you."
If my post helps you kindly save my time by voting my post.
www.aktualiteti.com
|
|
|
|
|
That doesn't sound like a database question.
|
|
|
|
|
Suppose, I have an application which talks to a database in SQL/Oracle, and presents some set of data to the user.
If, for any reason, someone modifies the table structure in the original database, and the application tries to work on the database, there will be an error or incorrect data being displayed.
Is there any way to prompt the user that there was a modification happened on this database ,.. with these tables modified,.. and so on? Or can we write a windows service to do this kind of tracking a database?
|
|
|
|
|
How about this ?
Create a "version" table where you could store a database schema version number and have your application check that value when it starts up.
However, you would have to have an agreement between the folks that modify your database schema and the people that write your application that any changes to the database schema would cause the version number to increment.
Another way of doing this would be to have a procedure in your application startup that would verify each table for it's structure; if the structure doesn't match, then stop the application.
Something like:
Open Table A, Iterate through the fields, check their name, datatype, length, Allow Null or Not ...
What you describe is actually an indication of a bigger problem. No change control procedures. If there is a change to your database in a production enviornment, there has to be a checklist, including signoff that all parties involved are aware of the change. You can't have people making ad-hoc changes to a production system without proper procedures; it will always end up biting you in the end.
Good Luck. 
|
|
|
|
|
You could write a startup procedure in the application the user runs that verifies the known database structure against one hardcoded in the application. This can be done using the ODBC / JDBC, but you'll need to contact the application developer. For as far as I know most programming languages offer the capability to request the existing table structure of a database.
Another option is that all applications access the data through views. And after every schema change an automated check on database level is performed to see if all the views still work. If not you alter the views slightly, making sure they return the expected data. This way you will only have to change the applications when they need additional data from your database scheme.
However the true question becomes rather different, why are you expecting the schema of the database to change without an update to the programming of the various applications using it. As usually a change in the database is triggered by a change in one of the programs using the data in it?
|
|
|
|
|
As has been pointed out, you have a fundamental problem with change control!
Both SQL Server and Oracle have system tables/views which will list all the objects (table and column names) in the database. I would use these and create a checksum or something based on the existing structure, create a proc that checks this and use it in your apps launch!
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
won't you get a lot of service calls any time you add a table or a field, making it all fail suddenly?
|
|
|
|
|
As there is a fundamental problem with change management I think that would be the least of his problems. It sounds like he does not own the database and he is not in the change management loop.
We recently had something like this where the IT team changed a view that was feeding us and did not inform the clients of the view. A rocket went around the IT team and we are now in the CM loop.
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
|
Hello
can any one please tell me how can i perform the following actin in SQL
if ((sizee == "") && (sidee == "") && (color == ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + orgnShortName;
}
else if ((sizee == "") && (sidee == "") && (color != ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + color + "-" + orgnShortName;
}
else if ((sizee == "") && (sidee != "") && (color == ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + sidee + "-" + orgnShortName;
}
else if ((sizee == "") && (sidee != "") && (color != ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + sidee + "*" + color + "-" + orgnShortName;
}
else if ((sizee != "") && (sidee == "") && (color == ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + sizee + "-" + orgnShortName + "*";
}
else if ((sizee != "") && (sidee == "") && (color != ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + sizee + "*" + color + "-" + orgnShortName;
}
else if ((sizee != "") && (sidee != "") && (color == ""))
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + sizee + "*" + sidee + "-" + orgnShortName;
}
else
{
ItemComputerCode = PartGroup + "-" + Model + "-" + Brand + "-" + sizee + "*" + sidee + "*" + color + "-" + orgnShortName;
}
return ItemComputerCode;
thnx in advance
Regards
|
|
|
|
|
It would likely involve case, but I wouldn't do it in SQL, just clean up the code you have.
System.Text.StringBuilder sb = new System.Text.StringBuilder() ;
sb.Append ( PartGroup ) ;
sb.Append ( "-" + Model ) ;
sb.Append ( "-" + Brand ) ;
string sep = "-"
if (sizee != "") { sbAppend ( sep + sizee ) ; sep = "*" ; }
if (sidee != "") { sbAppend ( sep + sidee ) ; sep = "*" ; }
if (color != "") { sbAppend ( sep + color ) ; sep = "*" ; }
sb.Append ( "-" + orgnShortName ) ;
return ( sb.ToString() ) ;
|
|
|
|
|
thnx,but if ay one plz do it in sql
|
|
|
|
|
Hi, I am running VS2008 and use SQLExpress. I craete a SP in my database. then when I wanna save it I will get this error : Cannot update identity column 'Code'
the above code is my SP
Create PROCEDURE dbo.SprocInsertUpdatePerson
(
@code int,
@id int,
@name nvarchar(50),
@passportNumber nvarchar(50),
@nationality nvarchar(50),
@created datetime,
@creator nvarchar(50)
)
AS
Declare @ReturnValue int
if (@Code IS NULL) --New Item
Begin
insert into Person
(
Code,
Id,
Name,
PassportNumber,
Nationality,
Created,
Creator
)
values
(
@code,
@id,
@name,
@passportNumber,
@nationality,
@created,
@creator
)
Select @ReturnValue = Scope_Identity()
End
else
Begin --Update Item
Update Person
Set Code = @code,
Id = @id,
Name = @name,
PassportNumber = @passportNumber,
Nationality = @nationality,
Created = @created,
Creator = @creator
where Id = @id
Select @ReturnValue = @Id
End
IF (@@ERROR != 0)
BEGIN
RETURN -1
END
ELSE
BEGIN
RETURN @ReturnValue
END
I really appreciate if someone help me.
thx a lot
|
|
|
|
|
You can remove it from the insert-statement; an IDENTITY[^] is automatically generated when a new record is inserted. Kinda like an autonumber-column in Microsoft Access. The Scope_Identity would then return that newly generated value.
I are Troll 
|
|
|
|
|
The error message has told you the problem: you cannot update teh identity column. Values for this column are automatically set by the database engine when you add a new record. They are read-only after that, as a unique identifier for that row. So you should not try to set the ID when updating records, just use it in the WHERE clause to specify which row to update.
|
|
|
|
|
Have you tried
SET IDENTITY_INSERT table ON
I use it when migrating data from an old database into an empty database.
But normally, IDENTITY should be set by the database, not by your code.
|
|
|
|
|
Hi, thanks for your answer; I will get the solution in the last post.
|
|
|
|
|
I am currently doing some project and I think Im going crazy. I am developing an online video rental using JavaScript, and actually has a database on it..Can I ask aside from ASP..what should I used to make a connection string,I am using a MS Access 2007 as database?where should I put it on my HTML/JavaScript file if you can give me a hint about making a connection string? it is possible to use database with pure HTML/Javascript file aside from asp?pls help me  thanks!
|
|
|
|
|
No, javascript by itself should not be used to connect to the database. Generally, javascript will make an ajax request to ASP which will connect to the DB and return results to javascript.
|
|
|
|
|
One can easily view the source of the HTML pages, and that would expose the connectionstring to the outside world. Hence, it'd be better safer to use a server-side language to access the database.
I are Troll
|
|
|
|
|
I see so there is no other way to connect it is by ASP/ASP.NET/ADO/AJAX?am I right?so if I used some of this language my file extension should be .asp..instead of .html or .js?if I used ADO?
|
|
|
|
|
ASP is the older serverside scriptlanguage
ASP.NET is the newer version
ADO is what's used to talk to the database
AJAX is used to have the client call some serverside function
Do you have a webserver that's capable of running ASP.NET pages? You can verify by executing a small test-aspx 
I are Troll
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
