Should I Have A Table That Stores A Subset Of Data From Other Tables???

Mar 21, 2007

DB design question

I have multiple tables with information about a user. The tables are Roles, Users, Groups and Profiles.

For a user session I need information from all those tables. Would it be better to make a table called UserSession and collect the necessary data from the above mentioned tables and stick them in one the UserSession table or should I just write a query that goes out and gets the data from the different tables.

What is better practice and what is faster?

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Nth Subset Of Data From Current Table

Jul 20, 2005

Hi,I was wondering if you guys have any nth script to reads from tableand outputs into a temp table subset of records. There was a nth toolI used to use it was GROUP1 which was written in C and it used to bevery fast on nth -in a flat file. In this program we used to pass fewparamaeters. For example if I want 30,000 records from the file of500,000. The function seams to work something like this. you dividethe 30,000 records of 500,000 which will result with .090909090909.Now we would pass only the first 7 digit (0909090) as parameter thatwould nth the file down to 30,000 records. This function allwaysworked whichever number you use as long as the read file is largerthan output fileI like to use the similar concept in Sql Server and I was wondering ifanyone has any script to do this or how to go about this?Thank you. I appreciate your feedbackagron

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Apr 7, 2008

I am trying to implement custom paging. I want to get a subset from my Threads and Post tables by userID. But I can't make the stored proc work. Could somebody have a look at this and tell me what I am doing wrong or if there is a better way of doing this?

ALTER PROCEDURE [dbo].[syl_ThreadPost_GetSubsetSortedByUserID2]

@UserID uniqueidentifier,

@sortExpression nvarchar(64),

@startRowIndex int,

@maximumRows int

AS

BEGIN

-- SET NOCOUNT ON added to prevent extra result sets from

-- interfering with SELECT statements.

SET NOCOUNT ON

BEGIN TRY

IF LEN(@sortExpression) = 0

SET @sortExpression = 'PostID'

-- Since @startRowIndex is zero-based in the data Web control, but one-based w/ROW_NUMBER(), increment

SET @startRowIndex = @startRowIndex + 1

-- Issue query

DECLARE @sql nvarchar(4000)

SET @sql = 'SELECT t.[ThreadName],

p.PostID,

p.[PostTypeID],

p.[LanguageID],

p.[PostAccessID],

p.[UserID],

p.[ThreadID],

p.[PostParentID],

p.[VoteSummaryID],

p.[Subject],

p.[Body],

p.[PostAuthor],

p.[PostDate],

p.[IsApproved],

p.[TotalViews],

p.[FormattedBody],

p.[IPAddress],

p.[PostCount],

p.[ArticleCount],

p.[TrackbackCount],

p.[IsSticky],

p.[StickyDate]

FROM

(SELECT t.[ThreadName],

p.PostID,

p.[PostTypeID],

p.[LanguageID],

p.[PostAccessID],

p.[UserID],

p.[ThreadID],

p.[PostParentID],

p.[VoteSummaryID],

p.[Subject],

p.[Body],

p.[PostAuthor],

p.[PostDate],

p.[IsApproved],

p.[TotalViews],

p.[FormattedBody],

p.[IPAddress],

p.[PostCount],

p.[ArticleCount],

p.[TrackbackCount],

p.[IsSticky],

p.[StickyDate],

ROW_NUMBER() OVER(ORDER BY ' + @sortExpression + ') AS RowNum

FROM syl_Threads t RIGHT OUTER JOIN syl_Posts p

ON t.[ThreadID] = p.[ThreadID])

WHERE t.[UserID] = ' + CONVERT(nvarchar(16), @UserID) + ' )

AS syl_ThreadPostInfo

WHERE RowNum BETWEEN ' + CONVERT(nvarchar(16), @startRowIndex) + ' AND (' + CONVERT(nvarchar(16), @startRowIndex) + ' + ' + CONVERT(nvarchar(16), @maximumRows) + ') - 1'

-- Execute the SQL query

EXEC sp_executesql @sql

RETURN

END TRY

BEGIN CATCH

--Execute LogError_Insert SP

EXECUTE [dbo].[syl_LogError_Insert];

--Being in a Catch Block indicates failure.

--Force RETURN to -1 for consistency (other return values are generated, such as -6).

RETURN -1

END CATCH

END

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Sep 7, 2006

Hi i have a csv file where the last column usually happens to be null. So my file is like this:
1,2,3,,{LF}
4,5,6,,{LF}
7,8,9,,{LF}
{CR}

I run the dts export from csv file to db and it doesnt save the last row (column5) in the table us null. instead it stores the {LF} character. Ascii =10. How can i resove this problem.
the csv comes from a third party application. the DTS needs to un automatically and somehow resolve that last problem on its own. but how??? is there a code that can trim the last character in the last line to delete the last {LF} or some query in DTS that can achive this.....

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Feb 5, 2008

Hi All,

Please let me know within Reporting server database which table stores the actual report name,keywords and author of the report.

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Thanks in advance,
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Jan 19, 2008

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May 1, 2007

hi i have a table as follows:

col1 col2 col3
2 BB 2
1 AB 3
3 CA 3
1 AC 1
2 BA 4
3 CB 2
2 BC 6
1 AA 2
3 CC 5

i want to output the whole row of each unique col1 where its col3 is max, so that i will get the ff result set
1 AB 3
2 BC 6
3 CC 5

i have an idea which is to use a cursor but i don't know the best/fastest way of doing it.
thanks heaps in advance!

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Mar 19, 2015

IF OBJECT_ID('tTable') IS NOT NULL
DROP TABLE tTable
GO

CREATE TABLE tTable
(nRow_IdINTEGER IDENTITY NOT NULL PRIMARY KEY,
nParent_IdINTEGERNULL,

[Code] ....

gives:

nRow_Id nParent_Id cGroup cValue
----------- ----------- ------- ------
1 1 One A
2 1 One B
3 2 One C

I want to insert a copy of this data, but w/ group = 'TWO', so the table will contain the additional rows

4 4 Two A
5 4 Two B
6 5 Tow C

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Same Table - Subset Of Info

Oct 25, 2007

I'm beating my head up against a wall here. I have one very LARGE table called op_hist.

CREATE TABLE [dbo].[op_hist] (
[op_trnbr] [int] NOT NULL ,
[op_type] [varchar] (80) ,
[op_date] [smalldatetime] NULL ,
[op_act_setup] [decimal](38, 10) NULL ,
[op_act_run] [decimal](38, 10) NULL ,
[op_qty_comp] [decimal](38, 10) NULL ,
[op_wkctr] [varchar] (80) ,
[op_part] [varchar] (30)

)

I need to be able to sum items grouped by op_wkctr and op_part and op_date. Here's my latest version which of course does not work.

SELECT op_wkctr, pcs, hrs.b
FROM
dbo.op_hist
INNER JOIN
(
SELECT op_part, SUM(op_qty_comp) as pcs
FROM dbo.op_hist
where op_type='BACKFLSH'
group by op_hist.op_part

UNION ALL

SELECT op_part, SUM(op_act_setup + op_act_run) as b
FROM dbo.op_hist
where op_type='LABOR'
group by op_hist.op_part
) AS hrs
ON op_hist.op_part = hrs.op_part
where (op_wkctr = 'P-P36' or op_wkctr = 'P-P38' or op_wkctr='P39') and op_date ='10/22/07'

Help me oby one - you're my only hope.

Sincerely,
Frustrated!

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Oct 22, 2007

Howdy all,

I have an Execute SQL Task that may return a result set. If it returns a result set, I'd like to log a failure in my package with the results visible.

I have logging turned on and that's working great. I've read about assigning results to a user variable of type Object and that's great. I can shred my results, thanks Jamie, with a Foreach loop no problem. Within that loop, I've got some VB that manipulates the values and will call Dts.Events.FireError as appropriate. However, VB is frowned upon here so my boss has asked that I push the VB logic into a Control Flow item.

I've built custom components already so I've got some familiarity with the process. Where I'm stuck at is figuring out _what_ the actual object type is in my code. The Connection manager is Native OLE DBSQL Native client. My Execute SQL Task uses a connection type of OLE DB with a Full result set. Results are stored in a variable named ErrorResultSet. Within the Execute method, I currently have this code set up in an attempt to pick apart the object and discover the available methods.





Code Block
Variables _variableCollection = null;
if (variableDispenser.Contains("ErrorResultSet"))
{
variableDispenser.LockForRead("ErrorResultSet");
}
variableDispenser.GetVariables(ref _variableCollection);

// Iterate through the variables that we were
// able to lock. Assigning values to entities as
// available.
foreach (Variable _en in _variableCollection)
{
switch (_en.Name)
{
case "ErrorResultSet":
Object _rs = _en.Value;
System.Type _type;
_type = _rs.GetType();
System.Data.DataSet _realResults;
_realResults = _rs as System.Data.DataSet;
// My expectation is that the cast of _realResults would
// not fail.
break;
}
}
// unlock before we go
_variableCollection.Unlock();
return DTSExecResult.Success;







At this point, my assumption is that the unboxed type of the recordset is not in the System.Data.DataSet inheritance chain as the cast failed. Anyone have insight into what it is? I can't seem to get any hits on google for what it's using behind the scenes in the Foreach ADO Enumerator.


Beyond the immediate question, anyone have thoughts on how else I can solve the problem? I had thought perhaps the task could raise an event if it returned rows but it didn't seem to have that functionality. Even if that had worked, telling the logging provider to capture the result set into the log might have been too much for native functionality. Another option I was thinking about would be to continue using the Enumerator and my custom component is a pure rewrite of the current Script task with the obvious downside being that I'd lose the generic-ness I was hoping to get with being able to hit my dataset.

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Feb 13, 2007

How would I write a select statement that would return multiple fields in a records based on a a distinct of one of those fiels.

Example

Table Name : Sales Table
Field Name : Name Address Phone Zip Sale
Rec1: Peter Smith 12 Market St 999-999-9999 12345 99.99
Rec2: John Jones 73 Broadway 999-999-8888 12345 12.34
Rec3: Charle Brown 42 Peanuts Ave 999-999-7777 12345 34.56
Rec4: Peter Smith 12 Market St 999-999-6666 12345 67.89
Rec5: John Jone 73 Broadway 999-999-5555 12345 36.52

How would I be able to return the columns Name Address and Phone based on the distinct of Name.

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Apr 9, 2015

i have one col in a nonclusted index which is bigint 8 bytes follwoing result shows min_record_size_in_bytes and max_record_size_in_bytes is 20 that is 12+8 page size is 8 kB. does that mean a record will use 20 bytes in a page or it will only use the space equalent to data stored in the col.what i have seen is page count is same weather i put some data in the col or null

select * From sys.dm_db_index_physical_stats(9,343,null,null,'DETAILED')
database_idobject_idindex_idpartition_numberindex_type_descalloc_unit_type_descindex_depthindex_
levelavg_fragmentation_in_percentfragment_countavg_fragment_size_in_pagespage_countavg_page_
space_used_in_percentrecord_countghost_record_countversion_ghost_record_countmin_
record_size_in_bytesmax_record_size_in_bytesavg_record_size_in_bytesforwarded_
record_countcompressed_page_count
999208304101HEAPIN_ROW_DATA102.9527559055118116253.187540514.196627131208358500016516516500
9992083041141NONCLUSTERED INDEXIN_ROW_DATA202553.21699.3544600938967585000202020NULL0
9992083041141NONCLUSTERED INDEXIN_ROW_DATA2101115.510254509513221600262626NULL0

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Mar 25, 2004

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The application for the front end to this is in Access. Would MSDE be the way to go for the database on the notebook ?

It's a small application with not many users, likelihood of conflicting edits is small.

Would the data transfer best be done with replication or with DTS ?
Presumably replication would allow options for control over conflicts, such as the same bit of data being changed on the server & on the notebook’s copy of the data ?

I need guidance re direction to head in with this.

Thanks

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Jan 29, 2014

I am trying to get counts of contacts.

So how do I subset, to gain a the accounts with the products then query to gain the contact counts from those accounts?

But for some reason it's giving me counts of products.

select distinct
a.region__c as [Region],
a.SFTX_ID as [SFTRX ID],
count(c.Contact_ID) as [Contact Count]
from vwContact c

[Code] .....

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Sep 14, 2005

Hi all,
I’ve a table with production objects, and another with possible items composition of the object. I need to count how many occurrences of each standard composition appears:
Table PROD:
PROD_ID    COMPONENT   TYPE
--------- ----------- -----
1         AAA         X1         BBB         Y2         AAA         X3         BBB         Y4         AAA         Y5         AAA         X5         BBB         YTable ITEM_COMPITEM_ID   COMPONENT   TYPE--------  ---------   -----7         AAA         X7         BBB         Y8         AAA         X9         BBB         Y
The result should be:
ITEM_ID   OCCURRENCES--------  ----7         28         19         1
Table PROD have millions of rows, my way is too slow (I’ve a loop where each PROD object are separately queried against the ITEM_COMP), some have an idea for a most efficient way?
 
ThX
 
NeuralC
 
 

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Nov 18, 2005

Here is my requirement.

There is a production database which has ever increasing data. For testing purposes though, I would like to build a test database with exactly the same schema but only a subset of data copied from the production database . I'll specify the criteria (something like a where clause in select query) for copying the data from the production database.

Is there a tool that anyone has come across to do this job ?

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Aug 24, 2006

Hi All,

I have a table A. I need output subset of a table A to a flat file using query, like:

select A.* from A inner join B on... ..... inner join C......where left(A.id, 3) = B.sid.... AND B.num between 100 and 200).

How can I do this in SSIS? Which data flow item I may need?

Thanks

 

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Mar 30, 2004

hi all

Any day, another question. I love you guys.

I want to select a subset of data from a dataset returned by either another subquery or a union.

e.g. this is how i would do it in oracle, but i have no idea how this can be done in mssql or whether it's possible at all.

select * from
(
select col1, col2, col3 from table1
union
select col1, col2, col3 from table 2
)
where col1 = 'blah'

in essence oracle treats the data returned by the subquery as a table that it would select from.


how would i do the same in mssql?

thank you


James :)

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May 13, 2015

I created a CTE which finds a subset of records from a table

I then ran a SELECT statement against the same table as

SELECT * FROM TABLE
EXCEPT (SELECT * FROM CTE)

Is it possible to add another EXCEPT statement after the CTE EXCEPT statement to cover a condition not incorporated in the CTE definition?

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Nov 13, 2007

Hi there.
I'm trying to extract data from my SQL server & everything in the script I've got is working (extracting correct data) except for one field - which is for the most part it's off by +2 days (on a few occasions - I see it off by just +1 day or even +3, but it's usually the +2 days).

I'm told that it's due to the conversion formula - but - since SQL is not my native language, I'm at a bit of a loss.

The DB table has the date field stored as a type: CHAR (as opposed to 'DATE')
Can anyone out there help?

Please advise. Thanks.

Best.
K7

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Feb 9, 2012

I'm trying to insert data into a table from two tables into a single table along with a hard coded value.

insert into TABLE1
(THING,PERSONORGROUP,ACCESSRIGHTS)
VALUES
((select SYSTEM_ID from TABLE2 where
AUTHOR IN (select SYSTEM_ID from TABLE2 where USER_ID
=('USER1'))),(select SYSTEM_ID from TABLE2 where USER_ID
=('USER2')),255)

I get the following-

Msg 512, Level 16, State 1, Line 1

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

The statement has been terminated.

Do I need to use a cursor?

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Feb 21, 2005

What's the best way to convert a large set of records from a simple schema where all fields are in one table to a schema where fields are split across two tables? The two table setup is necessary for reasons not worth getting into here.

Doing this via cursor is pretty straightforward, but is there a comparable set-based solution?

Here are sample create table commands. Obviously, the example below is simplified for discussion purposes.


-- One record from here will produce a record in TargetParentRecords and a record in TargetChildRecords for a total of two records.
CREATE TABLE OriginalSingleTableRecords (
ID INT IDENTITY (1, 1) NOT NULL,

ColumnA VARCHAR(100) NOT NULL,
ColumnB VARCHAR(100) NOT NULL,

CONSTRAINT PK_OriginalSingleTableRecords PRIMARY KEY CLUSTERED (ID)
)

CREATE TABLE TargetParentRecords (
ParentID INT IDENTITY (1, 1) NOT NULL,

ColumnA VARCHAR(100) NOT NULL,

CONSTRAINT PK_TargetParentRecords PRIMARY KEY CLUSTERED (ParentID)
)

-- Each row in this table must link to a TargetParentRecords row
CREATE TABLE TargetChildRecords (
ID INT IDENTITY (1, 1) NOT NULL,

ParentID INT NOT NULL, -- References TargetParentRecords.ParentID
ColumnB VARCHAR(100) NOT NULL,

CONSTRAINT PK_TargetChildRecords PRIMARY KEY CLUSTERED (ID)
)

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Feb 19, 2008

hi iam new to writting stored procedures

so anyone please help me out.

i have to transfer data from one table to three other new tables.
and if there are any duplicates in original table i have to send them to
duplicates table.the remaining data should be send to three other tables.
so can anyone help writting stored procedure for this.

thanks for your suggestions and answers


regards

ramya.

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Apr 28, 2014

Let us suppose I've 3 tables in which 2 columns data are same in all 3 tables & rest fields are distinct

Table 1 :
ID1 ID2 Gender Code towncode
1 12 1 234 1234
2 13 2 543 5463
89 187 1 125 N21Q

Table 2 :
ID1 ID2 Relation Name DOB
1 12 13 XYZ 21/01/1967
1 12 1 QAS 01/10/1987
1 12 2 NHS 09/12/2001
2 13 1 NHG 10/01/1987
2 13 2 GHS 16/12/1999
89 187 2 KJA 31/03/2000
89 187 1 KLA 09/11/1986
89 187 5 KOP 19/12/2001

Table 3 :
ID1 ID2 Period Date
1 12 1 01/01/2011
2 13 1 01/01/2011
89 187 2 01/01/2011

I want result as :
ID1 ID2 Gender Code towncode Relation Name DOB Period Date
1 12 1 234 1234 13 XYZ 21/01/1967 1 01/01/2011
1 12 1 234 1234 1 QAS 01/10/1987 1 01/01/2011
1 12 1 234 1234 2 NHS 09/12/2001 1 01/01/2011
2 13 2 543 5463 1 NHG 10/01/1987 1 01/01/2011
2 13 2 543 5463 2 GHS 16/12/1999 1 01/01/2011
89 187 1 125 N21Q 2 KJA 31/03/2000 2 01/01/2011
89 187 1 125 N21Q 1 KLA 09/11/1986 2 01/01/2011
89 187 1 125 N21Q 5 KOP 19/12/2001 2 01/01/2011

May be some duplicate entry of same record is available in Table 1.

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Mar 18, 2008

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Cal any one please help me out to resolve this issue.

Thanks
Prashant Hirani

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Sep 20, 2007



Hi,

I have 3 tables with the follwing schema
Table <Category>
{

UniqueID,
LastDate DateTime
}


Assume the follwing tables with data following the above schema

Table Cat1
{

1, D1
2, D2
3, D3
}
Table Cat2
{

2, D4
3,D5
4, D6
}
Table Cat3
{

1, D7
3,D8
5,D9
}

I have a Master and the schema is as follows
Table master
{

UniqueId,
Cat1 DateTime, -- This is same as the Table name
Cat2 DateTime, -- This is same as the Table name
Cat3 DateTime -- This is same as the Table name
}

After inserting the data from all these 3 tables, I want the my master table to look like this
Table Master
{

UniqueId cat1 cat2 Cat3
------------ --------- ------- -----------
1 D1 NULL D7
2 D2 D4 NULL
3 D3 D5 D8
4 NULL D6 NULL
5 NULL NULL D9
}


Please remember the column names will be same as that of table names

can any one pelase let me know the query t o acheive this

Thanks for your quick response
~Mohan Babu

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Apr 13, 2007

Hello,



I don't know if this could be done, but I will present this question...



I have an employee_table with empid, firstName, lastName, phExt columns.



I have another table called location_table that contains locationID, locationName, locPhext.



Here is the dataset from the 2 tables...

From Employee Table....

empid firstName lastName phExt

1 Ann Smith 1234

2 Barb Jones 4567

3 Jeff Teeves 8901



From Location Table

locationID locationName locPhext

1 Computer Room 3245

2 Board Room 1 8745

3 Conference Room 1 4564



Here is the data that I would like to pull in this format...



Ann Smith 1234

Barb Jones 4567

Board Room 1 8745

Computer Room 3245

Conference Room 1 4564

Jeff Teeves 8901



What SQL script could I use to produce the above results?



Thanks in advance

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Sep 10, 2007


Hi all,,

I posted the questions in sql forum and got good sql statement to work with it.. However, I want to see if there is a way to do it in SSIS..

May be this is really basic questions but I am having hard time to do it in sql server 2005 SSIS..

I have a flat file that I want to merge with table in SQL server 2005.

1> I have successfully created a data flow task to import data from flat file to Table X (new table I created for this package).

Now here is my question.
I have a Table A already in the database with the same column structure as of TableX (Both the tables have 20 columns/same Name/Same design).

I want to merge Table A and Table X and stored the data in TableA. However, I just don't want to merge blindly, I need to insert a new row in Table A only if the same row does not exist in Table A (there is no primary key, i am looking certain fields to see if the rows are same)..

Here is an example:
Table A
--------------
1 test test1 test2 test3 test4 test5
2 test test6 test7 test8 test9 test10

Table X
------------
1 test test1 test2 test99 test4 test5
2 test test98 test97 test 96 test95 test94
--------------------------------------------------------
Now, I want to only insert row 2 of Table X since there is match on 4 of the fields in row1..
The new Table A should look like

NEW Table A'
-----------------

test test1 test2 test3 test4 test5
test test6 test7 test8 test9 test10
test test98 test97 test 96 test95 test94


------------------------------------
I think, I could do this using Execute SQL task and write all the code in sql, but that will be cumbersome and time consuming.. Is there a simpler way to achieve this?

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Use VB DLL In A Stores Procedure?

Feb 14, 1999

I read in a technical journal (somewhere) that it is possible to create a ActiveX DLL in Visual Basic and use the DLL in a stored procedure. There were some limitations (because of stored procedures) but this is still a very powerful feature. Has anyone ever heard of this or read about this? Is there s source for explanation and examples?

Thanks, Rich.

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