Cursors Help-pubs Database
Apr 20, 2007
This is how i List the titles and author names, in general sql, but i have no idea using cursor. So, can anyone help me to create a cursor that loops through the authors table.
select
au_lname,
au_fname,
title
from
authors a
join titleauthor ta on (a.au_id=ta.au_id)
join titles t on (ta.title_id=t.title_id)
below is the ddl for the three tables.
CREATE TABLE [dbo].[titleauthor](
[au_id] [dbo].[id] NOT NULL,
[title_id] [dbo].[tid] NOT NULL,
[au_ord] [tinyint] NULL,
[royaltyper] [int] NULL,
CONSTRAINT [UPKCL_taind] PRIMARY KEY CLUSTERED
(
[au_id] ASC,
[title_id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
ALTER TABLE [dbo].[titleauthor] WITH CHECK ADD FOREIGN KEY([au_id])
REFERENCES [dbo].[authors] ([au_id])
ALTER TABLE [dbo].[titleauthor] WITH CHECK ADD FOREIGN KEY([title_id])
REFERENCES [dbo].[titles] ([title_id])
CREATE TABLE [dbo].[titles](
[title_id] [dbo].[tid] NOT NULL,
[title] [varchar](80) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[type] [char](12) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL DEFAULT ('UNDECIDED'),
[pub_id] [char](4) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[price] [money] NULL,
[advance] [money] NULL,
[royalty] [int] NULL,
[ytd_sales] [int] NULL,
[notes] [varchar](200) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[pubdate] [datetime] NOT NULL DEFAULT (getdate()),
CONSTRAINT [UPKCL_titleidind] PRIMARY KEY CLUSTERED
(
[title_id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
ALTER TABLE [dbo].[titles] WITH CHECK ADD FOREIGN KEY([pub_id])
REFERENCES [dbo].[publishers] ([pub_id])
CREATE TABLE [dbo].[authors](
[au_id] [dbo].[id] NOT NULL,
[au_lname] [varchar](40) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[au_fname] [varchar](20) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[phone] [char](12) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL DEFAULT ('UNKNOWN'),
[address] [varchar](40) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[city] [varchar](20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[state] [char](2) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[zip] [char](5) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[contract] [bit] NOT NULL,
CONSTRAINT [UPKCL_auidind] PRIMARY KEY CLUSTERED
(
[au_id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
ALTER TABLE [dbo].[authors] WITH CHECK ADD CHECK (([au_id] like '[0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9][0-9][0-9]'))
GO
ALTER TABLE [dbo].[authors] WITH CHECK ADD CHECK (([zip] like '[0-9][0-9][0-9][0-9][0-9]'))
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Jul 2, 2006
I have placed the pubs.mdf in the same folder as my asp page and have changed the connection string to : Dim ConnectionString As String = "server=(local);database=pubs.mdf;trusted_connection=true"
However, when I run this page, I get this message:
Server Error in '/' Application.
SQL Server does not exist or access denied.
What does the ConnectionString need to be for this to work?
Canning
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Mar 21, 2007
http://msdn2.microsoft.com/en-us/library/aa238305(SQL.80).aspx
how can i List the title name, year of order, state and total quantity for all sales?
Some of solutions are below but not for the above question.
-- list the titles by total sales price.
select
title,
sum(s.qty * t.price)
from titles t
join sales s on (s.title_id = t.title_id)
group by title
order by 2 desc
-- list the titles by total sales qty
select
t.title,
sum(s.qty)
from titles t
join sales s on (s.title_id = t.title_id)
group by t.title
order by 2 desc
-- list the stores and titles by sales price.
select
st.stor_name,
t.title,
sum(s.qty * t.price)
from titles t
join sales s on (s.title_id = t.title_id)
join stores st on (s.stor_id = st.stor_id)
group by
st.stor_name,
t.title
order by 1,3 desc
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Jul 8, 2005
Need help.After I installed MSDE. I opened a command prompt and navigate to C:Program FilesMicrosoft Visual studio .NET 2003SDKv1.1SamplesSetupAnd then I typed in: oSpl -S(local)VSdotNET -E -i instpubs.sqlI got the message:[DBNETLIB]SQL Server does not exist or acdcess denied.[DENETLIB]ConnectionOpen (Connect()).How can I fix it?The server 2000 is running and it's mixed login authentication.OS: windows server 2003Thank you,William
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Oct 13, 2005
Hello:I am in the middle of an asp.net 1.1 book and I ran into a problem that I can not seem to find an answer for.I am able to build an asp.net web form in Visual Studio.net and I am able to connect to my local SQL Server that is running on the same computer through Visual Studio, but when I go into build and preview my page in the browser, I get the "Error reading the database. [DBNETLIB][ConnectionOpen(Connect()).] SQL Server does not exist or access denied." Has any one been able to connect to pubs locally, or can any one give me a suggestion to what I can try? Any help would be greatly appreciated.
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May 21, 2001
While checking the SQL server error logs, I notice that the pubs and msdb database are automatically being backed up, even though no job is set up to do so....in addition, its backing up to a directory that I cannot find on our network.....does anybody have an idea of whats going on ?
the path its backingup to is:
(FILE=1, TYPE=PIPE: {'.pipedbasql70dbagent0s0'}).
Thank you in advance
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Jan 9, 2007
Hi all,
I have a stand-alone Windows XP Pro PC that has SQL Server Express (SSE) and Visual Web Developer Express (VWDE) programs. The Microsoft "pubs" Database is installed in the SQL Server Management Studio Express (SSMSE). I created a website in my VWDE program. I need the .mdf file of the pubs Database in the App_Data folder of website of my VWDE project. I think that User Instance in my SSE is established. I have studied Xcopy Deployment (SQL Server Express) and User Instance for a quite a while and I still do not know where and how to use Xcopy to get the mdf file of the pubs database into the App_Data folder of the website of my VWDE project. Please help and give me the detailed key steps/instructions about where and how to get the .mdf file of the pubs database into the App_Data folder of the website of my VWDE project via Xcopy.
Thanks in advance,
Scott Chang
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Feb 2, 2006
I am using sql server7.0
I want to know how to recover pubs and northwind data bases in case they are deleted.
Gajanan Kulkarni
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Jan 22, 2004
I have seen a bunch of ways to get the size of all the tables within a database posted on this board. I decided to modify an older one I found here (http://www.sqlteam.com/item.asp?ItemID=282). I set it up so there is no cursors or temp tables. Pretty much just one select statement to return all the info you would need. It seems to be faster than anything I have seen so far. Take it for whats its worth. Thanks to the original creator.
/*
Original by: Bill Graziano (SQLTeam.com)
Modified by: Eric Stephani (www.mio.uwosh.edu/stephe40)
*/
declare @low int
select @low = low from
master.dbo.spt_values
where number = 1 and type = 'E'
select o.id, o.name, ro.rowcnt, (r.reserved * @low)/1024 as reserved,
(d.data * @low)/1024 as data, ((i.used-d.data) * @low)/1024 as indexp,
((r.reserved-d.data-(i.used-d.data)) * @low)/1024 as unused
from
sysobjects o
inner join
(select distinct id, rowcnt
from sysindexes
where keys is not null and first != 0) ro on o.id = ro.id
inner join
(select id, sum(reserved) reserved
from sysindexes
where indid in (0, 1, 255)
group by id) r on o.id = r.id
inner join
(select c.id, dpages+isnull(used, 0) data from
(select id, sum(dpages) dpages
from sysindexes
where indid < 2
group by id) c full outer join
(select id, isnull(sum(used), 0) used
from sysindexes
where indid = 255
group by id) t on c.id = t.id) d on r.id = d.id
inner join
(select id, sum(used) used
from sysindexes
where indid in (0, 1, 255)
group by id) i on d.id = i.id
where o.xtype = 'U'
order by reserved desc
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Jul 20, 2005
Hello,What are the default login/password to access pubs and northwind databases ?I remember the login = "sa", but nothing about the password.ThanksEric
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Aug 24, 2007
I have just installed SQL Server 2005 Developer Edition and attached the Pubs database that is enabled for full-text searching and I have run full-text searches on it using Sql Server 2005 Express. When i tried to search, I was informed that the catalog was not in a stable condition. I ran this scriptDrop FullText Catalog PubsCatalogI got this message:Warning: The fulltext catalog 'PubsCatalog' is being dropped and is currently set as default.When I try to create a new PubsCatalog, I get:Msg 7689, Level 16, State 1, Line 1Execution of a full-text operation failed. 'The dependency service does not exist or has been marked for deletion.' I have tried other catalog names but the same result. This was easy to do with the same db in Sql Server 2005 Express. What is wrong and how do I fix it?
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Mar 10, 2008
Hi all,
I tried to use the "How to call a Parameterterized Stored Procedure by Using ADO.NET and Visual Basic.NET" in http://support.microsoft.com/kb/308049 to learn "Use DataReader to Return Rows and Parameter" in my VB 2005 Express. I did the following things:
1) created a stored procedure "pubsTestProc1.sql" in my SQL Server Management Studio Express (SSMSE):
USE pubs
GO
Create Procedure TestProcedure
(
@au_idIN varchar (11),
@numTitlesOUT Integer OUTPUT
)
As
select A.au_fname, A.au_lname, T.title
from authors as A join titleauthor as TA on
A.au_id=TA.au_id
join titles as T
on T.title_id=TA.title_id
where A.au_id=@au_idIN
set @numTitlesOUT = @@Rowcount
return (5)
2) created a project "pubsTestProc1.vb" in my VB 2005 Express and copied the following code from http://support.microsoft.com/kb/308049 (i.e. Added the code to the Form_Load eventQL_Client) :
Imports System.Data
Imports System.Data.Client
Imports System.Data.SqlType
Imports System.Data.Odbc
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim PubsConn As SqlConnection = New SqlConnection & _
("Data Source=.SQLEXPRESS;integrated security=sspi;" & _
"initial Catalog=pubs;")
Dim testCMD As SqlCommand = New SqlCommand & _
("TestProcedure", PubsConn)
testCMD.CommandType = CommandType.StoredProcedure
Dim RetValue As SqlParameter = testCMD.Parameters.Add & _
("RetValue", SqlDbType.Int)
RetValue.Direction = ParameterDirection.ReturnValue
Dim auIDIN As SqlParameter = testCMD.Parameters.Add & _
("@au_idIN", SqlDbType.VarChar, 11)
auIDIN.Direction = ParameterDirection.Input
Dim NumTitles As SqlParameter = testCMD.Parameters.Add & _
("@numtitlesout", SqlDbType.Int)
NumTitles.Direction = ParameterDirection.Output
auIDIN.Value = "213-46-8915"
PubsConn.Open()
Dim myReader As SqlDataReader = testCMD.ExecuteReader()
Console.WriteLine("Book Titles for this Author:")
Do While myReader.Read
Console.WriteLine("{0}", myReader.GetString(2))
Loop
myReader.Close()
Console.WriteLine("Return Value: " & (RetValue.Value))
Console.WriteLine("Number of Records: " & (NumTitles.Value))
End Sub
End Class
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
I compiled the above code and I got the following 15 errors:
Warning 1 Namespace or type specified in the Imports 'System.Data.Client' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 2 9 pubsTestProc1
Warning 2 Namespace or type specified in the Imports 'System.Data.SqlType' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 3 9 pubsTestProc1
Error 3 Type 'SqlConnection' is not defined. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 10 25 pubsTestProc1
Error 4 ')' expected. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 15 30 pubsTestProc1
Error 5 Name 'testCMD' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 17 9 pubsTestProc1
Error 6 ')' expected. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 20 23 pubsTestProc1
Error 7 Name 'RetValue' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 21 9 pubsTestProc1
Error 8 ')' expected. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 23 23 pubsTestProc1
Error 9 Name 'auIDIN' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 24 9 pubsTestProc1
Error 10 ')' expected. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 26 28 pubsTestProc1
Error 11 Name 'NumTitles' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 27 9 pubsTestProc1
Error 12 Name 'auIDIN' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 29 9 pubsTestProc1
Error 13 Type 'SqlDataReader' is not defined. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 32 25 pubsTestProc1
Error 14 Name 'RetValue' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 39 47 pubsTestProc1
Error 15 Name 'NumTitles' is not declared. C:Documents and Settingse1enxshcMy DocumentsVisual Studio 2005ProjectspubsTestProc1pubsTestProc1Form1.vb 40 52 pubsTestProc1
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
First, I am completely lost here alreay. Second, I should have the following code from http://support.microsoft.com/kb/308049 too:
OLE DB Data Provider
Dim PubsConn As OleDbConnection = New OleDbConnection & _
("Provider=sqloledb;Data Source=server;" & _
"integrated security=sspi;initial Catalog=pubs;")
Dim testCMD As OleDbCommand = New OleDbCommand & _
("TestProcedure", PubsConn)
testCMD.CommandType = CommandType.StoredProcedure
Dim RetValue As OleDbParameter = testCMD.Parameters.Add & _
("RetValue", OleDbType.Integer)
RetValue.Direction = ParameterDirection.ReturnValue
Dim auIDIN As OleDbParameter = testCMD.Parameters.Add & _
("@au_idIN", OleDbType.VarChar, 11)
auIDIN.Direction = ParameterDirection.Input
Dim NumTitles As OleDbParameter = testCMD.Parameters.Add & _
("@numtitlesout", OleDbType.Integer)
NumTitles.Direction = ParameterDirection.Output
auIDIN.Value = "213-46-8915"
PubsConn.Open()
Dim myReader As OleDbDataReader = testCMD.ExecuteReader()
Console.WriteLine("Book Titles for this Author:")
Do While myReader.Read
Console.WriteLine("{0}", myReader.GetString(2))
Loop
myReader.Close()
Console.WriteLine("Return Value: " & (RetValue.Value))
Console.WriteLine("Number of Records: " & (NumTitles.Value))
//////////////////////////////////////////////////////////////////////////////////////////////////////
Now, I am completely out of touch with these two sets of the code from the Microsoft KB 308049 and do not know how to proceed to get the following output stated in the Microsoft KB 308049-see the below:
4.
Modify the connection string for the Connection object to point to the server that is running SQL Server.
5.
Run the code. Notice that the ExecuteScalar method of the Command object returns the parameters. ExecuteScalar also returns the value of column 1, row 1 of the returned rowset. Thus, the value of intCount is the result of the count function from the stored procedure.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Please help and tell me what I should do to get this project landed on the right track.
Thanks in advance,
Scott Chang
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Jul 16, 2006
Hello,
Can anyone direct me a good article that is about why we should try avoiding using cursors and what are the alternatives?
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Feb 16, 2008
can we call cursors from asp.net as we can call stored procedures from asp.net.
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Jan 7, 2005
Hi,
I'm writting a stored procedure to insert new rows into a table, but I need to loop through an exsiting table and create a new record for every row in the old table. So I think what I'm needing to use is a cursor, but I've never worked with cursors before, and I just want to check that I have the right idea on what they are used for and if what I have so far looks ok.
This what I have so far, the StoreFees table only has 5 rows:
DECLARE @StoreFee as smallmoney
DECLARE @StoreLineID as int
DECLARE MyStoreFees CURSOR
FORWARD_ONLY
FOR
SELECT LineId, StoreFee FROM StoreFees ORDER BY StoreFee
OPEN MyStoreFees
FETCH NEXT FROM MyStoreFees
INTO @StoreLineId, @StoreFee
--Do my Inserts into other tables
INSERT INTO OtherTable (...,...,.., @StoreFee)
...
...
-- Done working with that row
CLOSE MyStoreFees
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Feb 28, 2005
I am trying to pull the data via fetching rows into a variable.
Begin
Fetch Next Into @temp...
Select @MainVariable = @MainVariable + @temp < @temp doesn't refresh with next fetch)
Print @temp < this works fine and returns the value for each fetch
End
I can print @temp and the data returns fine, but when I try to cancantenate with the above select, it doesn't refresh @temp wit the column in the table.
Any ideas?
DotNetNow
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Jun 19, 2001
I have two procedures. One works well, and the other has a small glitch I cannot figure out. I have placed >>>> at the place where the problem is occuring.
The first procedure, which is working great, is applying a stored procedure to many servers (remote procedure call), but is also polling the local server via a linked server connection. This way, all servers are polled equally.
The second procedure is actually using a SELECT statment to query a system table. This procedure works well on all servers except the local one. I get this error message:
Server: Msg 3910, Level 16, State 1, Line 1
Transaction context in use by another session.
[OLE/DB provider returned message: Unspecified error]
There seems to be a connection issue. Can someone help me work around this?
Thank you,
Neal
FIRST PROCEDURE (this one works perfectly):
truncate table dbidname
CREATE TABLE ##dbtemp ( dbname VarChar(50),
dbsize varchar (25),
dbownervarchar(50),
dbid smallint,
createdate datetime,
statusvarchar(75) )
declare@servernamevarchar(50)
declare dbupdate cursor
global
for
select servername from sqlservers where status = 'a'
open dbupdate
fetch next from dbupdate into @servername
while @@fetch_status = 0
begin
print @servername
EXEC sp_addlinkedserver @servername, 'SQL Server'
>>>INSERT INTO ##dbtemp
>>>exec (@servername + '.master..sp_helpdb')
alter table dbidname alter column sqlservers_id int null
insert into dbidname (dbsystemid, dbname)
select dbid, dbname from ##dbtemp
update dbidname set sqlservers_id = sqlservers.sqlservers_id from sqlservers where @servername = sqlservers.servername and
dbidname.sqlservers_id is null
update dbidname set whenupdate = getdate()
alter table dbidname alter column sqlservers_id int not null
exec sp_dropserver @servername
delete ##dbtemp
fetch next from dbupdate into @servername
end
close dbupdate
deallocate dbupdate
drop table ##dbtemp
exec spal_db_files_update
SECOND PROCEDURE (see >>>> to note problem area):
truncate table dbidname
CREATE TABLE ##dbtemp ( dbname VarChar(50),
dbsize varchar (25),
dbownervarchar(50),
dbid smallint,
createdate datetime,
statusvarchar(75) )
declare@servernamevarchar(50)
declare dbupdate cursor
global
for
select servername from sqlservers where status = 'a'
open dbupdate
fetch next from dbupdate into @servername
while @@fetch_status = 0
begin
print @servername
EXEC sp_addlinkedserver @servername, 'SQL Server'
>>>>INSERT INTO ##dbtemp
>>>>exec (@servername + '.master..sp_helpdb')
alter table dbidname alter column sqlservers_id int null
insert into dbidname (dbsystemid, dbname)
select dbid, dbname from ##dbtemp
update dbidname set sqlservers_id = sqlservers.sqlservers_id from sqlservers where @servername = sqlservers.servername and
dbidname.sqlservers_id is null
update dbidname set whenupdate = getdate()
alter table dbidname alter column sqlservers_id int not null
exec sp_dropserver @servername
delete ##dbtemp
fetch next from dbupdate into @servername
end
close dbupdate
deallocate dbupdate
drop table ##dbtemp
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Nov 28, 2000
I am receiving this error when running my cursor:
Error Messages...
Server: Msg 16933, Level 16, State 1, Line 0
The cursor does not include the table being modified.
The statement has been terminated.
Server: Msg 16933, Level 16, State 1, Line 5 (this message repeats)...
The cursor does not include the table being modified.
The statement has been terminated.
query:
declare cursor_test CURSOR for
select emp_ssn, effective_date1 from temp_employee_benefit_load
open cursor_test
declare @ssn char(9), @process_date char(8)
fetch next from cursor_test into @ssn, @process_date
while (@@fetch_status=0)
update test_cursor
set ssn = @ssn, process_date = @process_date
where current of cursor_test
fetch next from cursor_test into @ssn, @process_date
close cursor_test
deallocate cursor_test
Any help is appreciated:
Thanks,
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Sep 7, 2000
I have stored procedure in that I am using a cursor to fetch the row by row.
cursor is fetching 75000 records so that the procedure is taking long time.
Is there any way to replace the cursor to fetch the records row by row.
He needed.
Ranch
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Apr 14, 2000
Please help resolve a problem (and debate!).
We have an app using VB with Access as the front end to SQL. SQL statments were built and sent
directly to the server obtaining set-oriented results. Response was fair.
We have a new app developed by an "expert" using VB & Interdev that was to be ported for use on
the internet. The app was designed using the same logic to build the SQL statements, but it is also
using cursors to retrieve all data. RESPONSE IS TERRIBLE!
The designer says that to access SQL over the Web, cursor use is a MUST!
True? Not True?
If true, and I am stuck with an app using cursors, any basic suggestions on where to look to improve
response time?
Thanks for any input.
FJ
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Apr 23, 1999
Hi,
I am using SQL Server 6.5 and I have a VB routine that updates a field in a tble so it can be used in a primary key. This is run after input of data using bcp. I have noticed on several posts re: using cursors to move through a recordset and was wondering if I could use this functionality to replace my VB routine. I checked the archives and found several messages but I am not sure where to start. My VB routine is:
I first would query the data to return all rows where the value of R08SegmentValue= Null. Then I move through the resultset changing the value of the field R08Segments.
***********************Start of VB Code****************
'Set initial value for sTReportHeaderIdx
With rs1
sTReportHeaderIdx = !ReportIdx & !HeaderIdx
sPReportHeaderIdx = sTReportHeaderIdx
End With
bCount = 1
'loop through rs and when streportheaderidx changes reset bCount to 1
'otherwise increment bcount by 1 and write to field R08SegmentValue
Do While rs1.EOF = False And blnContinue = True
DoEvents
Do While sPReportHeaderIdx = sTReportHeaderIdx
With rs1
.Edit
!R08SegmentValue = bCount
.Update
bCount = bCount + 1
sPReportHeaderIdx = sTReportHeaderIdx
.MoveNext
If Not rs1.EOF Then sTReportHeaderIdx = !ReportIdx & !HeaderIdx
End With
Loop
sPReportHeaderIdx = sTReportHeaderIdx
bCount = 1
Loop
In the end my data should look like
ReportIdx HeaderIdx R08SegmentValue
1 1 1
1 1 2
2 1 1
2 1 2
2 1 3
3 1 1
3 1 2
3 1 3
1 2 1
1 2 2
1 2 3
etc..
Can this be done via an sp? How would I go about writing something like this?
Thanks in advance...any assistance you could provide would be appreciated!
Kevin
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Aug 6, 2002
I hope someone can help me with this, as BOL didn't get me the answer I am looking for.
I want to write an update step that will transform the following:
1 abc
1 def
2 lmn
3 rst
4 tuv
4 xyz
4 jkl
5 pqr
into this:
1 abc,def
2 lmn
3 rst
4 tuv,xyz,jkl
5 pqr
In other words, I want to concatenate multiple instances into 1 record per row, but I am not familiar with working with cursors or loops.
Thanks in advance!
bv
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Nov 16, 1998
According go textbooks and T-SQL developers experience - using cursors is not recommended, more over they say: avoid cursors where it's possible.
Could someone please recommend any other way to go through the recordset(resultset) forward and backward to perform some search or calculations, if there are a specific requirement for not using front-end tools such as VB or MS Access(please don't ask why), other words - all the work must be performed in T-SQL stored procedure.
Thanks
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Feb 24, 2008
Hi
I defined a cursor and executed it...but now i exactly forgot what select statement i had run in the cursor..(forgot the columns that i am extracting )
how do I view the contents of the cursor ?
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Aug 25, 2004
I have a stored proc that merges records from an undeduped table to a deduped table. It is running really slowly. Merging 70 million records against a deduped 70 million is taking 115 hours and counting on decent hardware. Very slow.
I suspect there is significant room for optimization here. Some of my ideas:
- Write/update back to the cursor rather than executing separate UPDATE statements.
- Try a dynamic cursor instead of a READ ONLY cursor.
- Dump new elements to a separate table or a file and then do a single large INSERT.
Anyone else think any of these ideas will work? Can anyone think of something better?
BTW, I've tried to replaced the procedural cursor code with set based UPDATES/INSERTS but the short version of the story is that that route just didn't pan out. I know that is very common optimization advice.
I've made minor simplifications to the code:
- Took out code to handle last line
- Took out progress logging code
- Removed some DECLARE statements. These are needed to run but it should be obvious what they were supposed to be.
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Aug 27, 2004
Trying to understand cursors a little better, found this in one of the dbs I inherited. Just trying ot figure out why they put it there cause no one else knows anything about it.
DECLARE [TM #] CURSOR
FOR SELECT * FROM [2004 TERMS];
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Jan 14, 2005
nevermind forget I asked thanks anyways
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Feb 10, 2005
These guys I work with have some sql scripts they run over night and they bog down the server and the machine will be gummed up in the morning etc..
Well, I finally looked at this processing and the culprit is cursors. And cursors within cursors. I would like to just get some opinions about what would be more processor efficient so I can send my boss a link to this thread.
Using a cursors to pull records and update them.
vs
Create script using a scripting language that pulls the records through ADO, loops through them and performs updates as necessary using update statements and the like.
Be nice. I have to work with these guys.
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Jan 24, 2006
In what situations would you use a cursor over a t-SQL update/select statement
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Jun 26, 2007
Hey guys
I have heard cursors are not the way to go. But I am wondering if/how to get out of a situation that I am using a cursor in...in order to make my stored proc run more effieciently.
I am quite novice in my abilities and I am completely stumped on how to get around using them.
As far as INSERTs go, I think I can work around that, but how would I write UPDATE statements for all lines of a table to say pull a key from another table to reference them together?
I usually make my SELECT statement in the cursor, then update against the criteria from the SELECT statement. Now this is quite a slow process when I am updating 100K records.
Any help or pointers or a link to a good tutorial would be woderful.
Thanks
tibor
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Jan 23, 2004
declare BadRecords cursor dynamic for select lngZipCodeID
from ZipCodes where lngZipCode=@ZipCode and lngZipCodeID<>@NewZipID
/* this is the syntax in Sybase
open BadRecords;
BadRecordsLoop: loop
fetch next BadRecords into BadID;
if sqlstate<>0 then
leave BadRecordsLoop
end if
*/
I have to convert it to sql , I m just checking whether my syntax is correct or not
open BadRecords
while @@fetch_status = 0
begin
set @BadId = fetch next BadRecords
if @@Error = 0
end
I have doubt in my syntax. Can you help me out in this?
Thx
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Feb 11, 2004
I have a requirement to check a value which MUST be unique forever even if it is removed and readded.I have created a seperate table to maintain this value.
Without using a cursor how would I be able to append a duplicate base value (i.e. smith.j@here.now) with the next sequential value (i.e. smith.j02@here.now)
Any takers?
Oh ya, These values are not manually entered but populated through a DTS script. The existing values are repopulated from historic tables and new entries are added automatically. Initially the values would be populated without a number but a number needs to be generated on duplicates.
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Apr 8, 2008
Could not complete cursor operation because the table schema changed after the cursor was declared.
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