How Do I Walk Through A Table One Record At A Time Without Using A Cursor

Feb 2, 2002

Hi, I'm newbie in SQL, could somebody tell me how do I walk through a table one record at a time without using a cursor please.

Greatly appreciated.
Ann

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How To Walk Through All The Columns Of Two Different Table

May 21, 2012

I am two table. They are backup of each other. I would like to find out what the columns of a row that need to be sync.

For example

Record with ID = 2345, Update Name (From, to) (IreneLee, Irene)
Record with ID = 2345, Update Birthday (From, to) (1975-04-24 , 1975-04-24 )
Record with ID = 4568, Update Name (From, to) (VictorChu, Victor)

I use this statement

with cte1 As
(
Select T1.ID As 'ID',
T1.Name As 'T1Name',
T2.Name As 'T2Name',
T1.Birthday As 'T1Birthday' ,
T2.Birthday As 'T2Birthday'
from T1 inner join T2 on T1.ID = T2.ID
)
Select * from cte1

(eventually I have to programatically generate the above statement)

Below is the result:

ID T1.Name T2.Name T1.Birthday T2.Birthday
--------------------------------------------------------------
1234 Richard Richard 1971-02-09 1971-02-09
2345 IreneLee Irene 1975-04-24 1975-04-24
3456 Danny Danny 1962-09-08 1962-09-08
4568 VictorChu Victor 1962-09-08 1962-09-08

And I use the below script

DECLARE @tableName varchar(max)
Set @tableName= 'T1'
Select column_name From
(
SELECT column_name

[Code] .....

I need to find out what is different between each similar column (e.g. T1.Name and T2.Name) for each row It looks like I need two loop.

This is what the logic I think I need.

For (row in Rows for JoinTable) {
For(column in Columns for ColumnTable) {
if ('T1'.column <> 'T2'.column) {
Insert ('T1.ID' , 'Update T2. ' + column name, 'T1'.column, 'T2'.column)
into #ChangesTable
} } }

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Jan 28, 2005

I would like to 'one table' record to separate 'two or three tables'
. I just know use the DTS , try to import and export again and agian.
So trouble.

Could you give me some suggestions for me? For example ,
'Cursor' write in new table . But I try to SQL Server Books Online
which is not suitable for me solving problems. One table separate two
or three tables. Can you wirte the detail example for me?
Thx a lot.

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Jul 23, 2005

I'm writing a classic ASP application that records all logging of userlogins on our support site. The logging is a rolling window of how manypeople have logged in for a given month, i.e. tracked by a 'lastlogin'field so the tracking is done in a date range. So, for the month ofJanuary I would record lastlogin dates between January 1 and January31. My question is this...on the last day of the month (example beingJanauary)at 23:59:59PM I want to write the total number of users thathad a lastlogin date within the month of January and write that totalnumber to another table so I have a point-in-time figure for Januarylogins and how many users logged in in the month of January. How do Ido that? How can I have the sql server dynamically check the last dayof each month at 23:59:59PM and then run that query to obtain the totalnumbers users that logged in and then record that value to anothertable?? Do I use a SQL Job to do that?Any help would be greatly appreciated! Thanks!

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Hi
 
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thanks

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Dec 15, 2006

I am using VS2005 (VB) to develop a PPC WM5.0 Program. And I am using SQLCE 3.0. My PPC Hardware is in 400MHz.

The question is when the program try to insert the first record into sdf database after each time the program started. It takes a long time. Does anyone know why and how can I fix it?

I will load the whole database into a dataset when the program start and do all the "Insert", "Update", "Delete" in this dataset and fill it into database after each action.

        cn.Open()
        sda = New SqlCeDataAdapter(SQL, cn) 'SQL = Select * From Table
        scb = New SqlCeCommandBuilder(sda) 
        sda.Update(dataset)
        cn.Close()

I check the sda.update(), it takes about 0.08s for filling one record into database normally. But:

1. Start the PPC Program

2. Load DB into dataset

3. Create a ONE new record in dataset

4. Fill back to DB

When I take this four steps everytime, the filling time is almost 1s or even more!

Actually, 0.08s is just a normal case. Sometimes, it still takes over 1s to filling back a dataset which only inserted one record when the program is running. (Even all inserted records are exactly the same in data jsut different in the integer key)

 However, when I give up the dataset and using the following code:

            cn.Open()
            Dim cmd As New SqlCeCommand(SQL, cn) ' I have build the insert SQL before (Insert Into Table values(XXXXXXXXXXXXXXX All field)

           cmd.CommandType = CommandType.Text
            cmd.ExecuteNonQuery()
            cn.Close()
            StartTime = Environment.TickCount

 I found that it is still the same that the first inserted record takes more time, but just about 0.2s. And the normal insert time is around 0.02s. It is 4 times faster!!!

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Nov 4, 2007

Hi,
I'm relatively inexperienced in sql, and am having trouble interpreting the behavior of a cursor in some code I have inherited.  When there is a record in both the Filters and FilterElements tables, the fetch_status is 0.  If there is a record in Filters, but no child record in FilterElements, the fetch_status is -1.  Since the tables are joined with a RIGHT OUTER JOIN, even when there is no corresponding record in FilterElements, a record is returned (I have verified running the select in a query window).  But when used in a cursor, the record is not fetched.  The fetch_status is -1.  Can anyone tell me why the fetch doesn't work in this case.  Thanks
----
DECLARE @CreatedByUser nchar(100), @WorkflowIDs varchar(50);
DECLARE @MyVariable CURSOR;
SET @MyVariable = CURSOR FOR
SELECT isnull(Filters.WorkflowIDs, ''),
isnull(FilterElements.CreatedByUser, '')
 
FROM Filters RIGHT OUTER JOINFilterElements ON Filters.ItemID = FilterElements.FiltersItemID
WHERE FiltersItemID = @FilterID;
OPEN @MyVariable;FETCH NEXT FROM @MyVariable
INTO @WorkflowIDs, @CreatedByUser;

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Apr 20, 2004

Please tell me how to code the Update of the current cursor record as one would do using VD/ADO :

VB: Table("Fieldname") = Value

----------------------------------------------------------
Declare @NextNo integer
Select @NextNo = (Select NextNo from NextNumbers where NNId = 'AddressBook') + 1

--Create a Cursor through wich to lo loop and Update the ABAN8 with the corrrect NextNo
DECLARE Clone_Cursor CURSOR FOR Select ABAN8 from JDE_Train.trndta.F0101_Clone
Open Clone_Cursor
Fetch Next from Clone_Cursor
WHILE @@FETCH_STATUS = 0
BEGIN
Select @NextNo = @NextNo + 1
Clone_Cursor("ABAN8") = @NextNo
Update Clone_Cursor
FETCH NEXT FROM Clone_Cursor
END

CLOSE Clone_Cursor
DEALLOCATE Clone_Cursor
GO

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Sep 20, 1999

This may be a stupid question

I am going to setup "walk the log" replication as shown

1. Server A dumps its log every 10 min
2. Server B loads the log every 12 min

I know how this works and it is fine and dandy, but can anyone do any transactions on Server B? if so what does that do to trying to keep things in sync and rollback?

Thanks
Pat

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Jan 13, 2008

I have to make some quick and dirty changes to some open source code I'm working with.  I need to be able to look in one table for all records that fit a filter like this:"Select ProductID, quantity, attributes From OrderItem WHERE Orderid = " & sOrderIdFor each row, I grab the ProductID and attributes.  Then I need to find the record in another table where the ProductID is the same, and the ListItem field  is a substring of attributes.  To help clarify, Attributes may be "<b>Color</b>: Black<br>".  ListItem would be "Black", a substring of Attributes.Once I find the record I'm looking for, I'll need to update a field in second table.I've been using Strongly Typed Datasets so far.  I don't know how to walk down two tables in .NET.  I'm also very weak on joins.  How do I accomplish this? Diane 

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Jul 20, 2005

Hello,Is it possible? Can I select a specific record of the cursor to besent to a seperate function to do all the computations etc.?Regards,VS

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Jun 28, 2004

Hi,

First of all sorry about poor english.
I have the next problem:
I have a store procedure which declares a cursor which is a select from some tables. I´m surprised because the sp takes over 10 seconds on working and if i execute the select of the cursor as separate ways, it takes no more one second. I´ve changed the select with another easier select and it works 0 seconds, so it seems that the problem is in the select, but only if i use a cursor to save the regs, why????????

Thanks a lot.

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Join Cursor With Table Outside Of Cursor

Sep 25, 2007

part 1

Declare @SQLCMD varchar(5000)
DECLARE @DBNAME VARCHAR (5000)

DECLARE DBCur CURSOR FOR
SELECT U_OB_DB FROM [@OB_TB04_COMPDATA]

OPEN DBCur
FETCH NEXT FROM DBCur INTO @DBNAME


WHILE @@FETCH_STATUS = 0
BEGIN

SELECT @SQLCMD = 'SELECT T0.CARDCODE, T0.U_OB_TID AS TRANSID, T0.DOCNUM AS INV_NO, ' +
+ 'T0.DOCDATE AS INV_DATE, T0.DOCTOTAL AS INV_AMT, T0.U_OB_DONO AS DONO ' +
+ 'FROM ' + @DBNAME + '.dbo.OINV T0 WHERE T0.U_OB_TID IS NOT NULL'
EXEC(@SQLCMD)
PRINT @SQLCMD
FETCH NEXT FROM DBCur INTO @DBNAME

END

CLOSE DBCur
DEALLOCATE DBCur


Part 2

SELECT
T4.U_OB_PCOMP AS PARENTCOMP, T0.CARDCODE, T0.CARDNAME, ISNULL(T0.U_OB_TID,'') AS TRANSID, T0.DOCNUM AS SONO, T0.DOCDATE AS SODATE,
SUM(T1.QUANTITY) AS SOQTY, T0.DOCTOTAL - T0.TOTALEXPNS AS SO_AMT, T3.DOCNUM AS DONO, T3.DOCDATE AS DO_DATE,
SUM(T2.QUANTITY) AS DOQTY, T3.DOCTOTAL - T3.TOTALEXPNS AS DO_AMT
INTO #MAIN
FROM
ORDR T0
JOIN RDR1 T1 ON T0.DOCENTRY = T1.DOCENTRY
LEFT JOIN DLN1 T2 ON T1.DOCENTRY = T2.BASEENTRY AND T1.LINENUM = T2.BASELINE AND T2.BASETYPE = T0.OBJTYPE
LEFT JOIN ODLN T3 ON T2.DOCENTRY = T3.DOCENTRY
LEFT JOIN OCRD T4 ON T0.CARDCODE = T4.CARDCODE
WHERE ISNULL(T0.U_OB_TID,0) <> 0
GROUP BY T4.U_OB_PCOMP, T0.CARDCODE,T0.CARDNAME, T0.U_OB_TID, T0.DOCNUM, T0.DOCDATE, T3.DOCNUM, T3.DOCDATE, T0.DOCTOTAL, T3.DOCTOTAL, T3.TOTALEXPNS, T0.TOTALEXPNS


my question is,
how to join the part 1 n part 2?
is there posibility?

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Help With Cursor To Insert 100 Rows At A Time

Jan 17, 2007

Hi all,

Can one of you help me with using a cursor that would insert only 100 rows at a time from source table 1 to target table 2. I am not able to loop beyond the first 100 rows.

Here is what I have till now:


CREATE procedure Insert100RowsAtaTime
AS
SET NOCOUNT ON

declare @Col1 int
declare @Col2 char(9)
DECLARE @RETURNVALUE int
DECLARE @ERRORMESSAGETXT varchar(510)
DECLARE @ERRORNUM int
DECLARE @LOCALROWCOUNT int

declare Insert_Cur cursor local fast_forward
FOR
SELECT top 100 Col1,Col2 from Table1
WHERE Col1 not in ( SELECT Col1 /* Col1 is PK. This statement is used to prevent the same rows from being inserted in Table 2*/
from Table2)

set @RETURNVALUE = 0
set @ERRORNUM = 0

BEGIN

open Insert_Cur
fetch NEXT from Insert_Cur into @Col1, @Col2
while (@@FETCH_STATUS = 0)
insert into Table2 (Col1,Col2) select @Col1,@Col2

SELECT @ERRORNUM = @@ERROR, @LOCALROWCOUNT = @@ROWCOUNT
IF @ERRORNUM = 0
BEGIN
IF @LOCALROWCOUNT >= 1
BEGIN
SELECT @RETURNVALUE = 0
END
ELSE
BEGIN
SELECT @RETURNVALUE = 1
RAISERROR ('INSERT FAILS',16, 1)
END
END
ELSE
BEGIN
SELECT @ERRORMESSAGETXT = description FROM [master].[dbo].[sysmessages]
WHERE error = @@ERROR
RAISERROR (@ERRORMESSAGETXT, 16, 1)
SELECT @RETURNVALUE = 1
END

fetch NEXT from Insert_Cur into @Col1, @Col2
end

close Insert_Cur
deallocate Insert_Cur

RETURN @RETURNVALUE
END

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Apr 30, 2008

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One of the W2K3 guests is my database server; the other W2K3 guest is my report server. Just like with a physical SSRS environment, there are many choices that need to be made during the installation and configuration--any one of which, it seems, can prevent the environment from working properly.

Currently, I'm struggling with getting my virtual distributed SSRS environment to work. I could go into the details, but I figured I'd ask a basic question first: Is anyone aware of a book, magazine article, blog, etc. that goes through a distributed SSRS installation--listing the requirements, discussing the choices, considering the implications, etc.?

Off the top of my head, such a walk-through would ideally cover networking configuration issues (Virtual PC or otherwise), Active Directory considerations, Windows Firewall settings between the servers, SSRS-related service account selections, authentication between the servers, etc.

If no one has produced such a walk-through (!), I'd be happy to write one so that others don't have to deal with the same struggles I'm currently dealing with....but I'd need your help.

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May 2, 2000

I wrote a stored procedure (see below), which within a database create a new column (Ordering)and order rows that have the same OID, DECISION_DATE and give a to column ORDERING value 1 to the highest VOTES_REQUIRED VALUE, VALUE 2 to the second Hignest value and so On.
In Other words I am creating a sort on Index (ORDERING Column) on subsets of the database which have same OID and DECISION_DATE based on the value of VOTES_REQUIRED.

The stored procedure is working and I get the right results, but IT TAKES 3 HOURS 30 MINUTES to go through 38,000 rows. I have to run this stored procedure for a database with 200,000 rows (it may take tens of hours...).
Is there any idea to improve the following code to make it run efficiently.

Thank you in Advance.

**************************************************

CREATE PROCEDURE SP_ORDERING_TEST AS

declare @oldoid varchar(12)
declare @olddecision_date varchar(75)
declare @oid varchar(12)
declare @decision_date varchar(75)
declare @ordering varchar(1)
declare @ordering_count int
declare @votes_required varchar(12)

set @oldoid = 'space'
set @olddecision_date = 'space'
set @oid = 'space'
set @decision_date = 'space'
set @votes_required='space'
set @Decision_id = 'space'
set @ordering = '0'
set @ordering_count = 0

declare review_test_cursor cursor for
select oid,decision_date,votes_required,ordering,decision _id from MYTABLE

open review_test_cursor
fetch review_test_cursor into @oid,@decision_date,@votes_required,
@ordering,@Decision_id

while (@@fetch_status = 0 )
begin
if @oldoid <> @oid or @olddecision_date <> @decision_date
begin
set @oldoid = @oid
set @olddecision_date = @decision_date
set @ordering_count=0
end
update MYTABLE

set ordering = CAST ((@ordering_count + 1) as VARCHAR)
where decision_id = @Decision_id
set @ordering_count = @ordering_count + 1

fetch review_test_cursor into @oid,@decision_date,@votes_required, @ordering,@Decision_id

end

close review_test_cursor
deallocate review_test_cursor

*************************

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I don't know why the outputs in table_3 are quiet different than I think. This store procedure comes out with two exactly same queries and one marked as C and another marked as E.

CREATE PROCEDURE procedure1
AS
DECLARE cursor_1 CURSOR FOR
SELECT
'This is a executable query'
FROM table_1
DECLARE @table_2

[code]....

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This store procedure will get some executable queries from the select statement, the cursor will fetch each rows to execute the query and insert the queries into table_3 to mark as 'E'. Until 17:00, this store procedure will stop execute the queries and just get the queries from select statement insert into table_3 to mark as 'C'.

I don't know why the outputs in table_3 are quiet different than I think. This store procedure comes out with two exactly same queries and one marked as C and another marked as E.

CREATE PROCEDURE procedure1
AS
DECLARE cursor_1 CURSOR FOR
SELECT
'This is a executable query'
FROM table_1
DECLARE @table_2
DECLARE @stoptime DATETIME = NULL;

[Code] ....

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FETCH NEXT FROM RegCreatedDate INTO @RegCreatedDate
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Table1 data Table2 Data

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[Code]....

-- not accurate b/c it returns 0 for all TimePerPageSec
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Hi, all experts here,



Thanks for your kind attention.



I want to use time series algorithm to mine data from my case table and nested table. Case table is Date table, while nested table is the fact table. E.g, I want to predict the monthly sales amount for different region (I have region table related to the fact table), how can I achieve this?

Thanks a lot and I hope it is clear for your help and I am looking forward to hearing from you shortly.

With best regards,

Yours sincerely,



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Jun 4, 2007

Hi, all experts here,



Thank you very much for your kind attention.



I am confused on key column of case table and key time column of nested table by using Time Series algorithm.

In my case, the case table structure is as below:

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Also, in the nested table, as the key time column has been set to Cal_month rather than Dimdate_key of the nested table, as a result, would the single series based on the cal_month?



Hope it is clear for your advices and help.

And I am looking forward to hearing from you shortly.



With best regards,



Yours sincerely,





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Jul 1, 2001

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