Import Hierarchical Data

Feb 17, 2006

hi folks,

I have to import hierarchical text files like:
32;country;city;postalcode;street
21;name;firstname;salutation;title;age;nickname
21;name;firstname;salutation;title;age;nickname
...

additionally I have to eleminate doubles. what is the best way for this problem ?
I have set up a flatfilesource with two columns and a conditional split on the first column
so now I have an output with [country;city;postalcode;street] and one with [name;firstname;salutation;title;age;nickname]. How do I split this in columns, put it in a dataset keeping the relations and remove doubles ?

Iam looking forward for any helping idea.

rgrds,
matze

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Hierarchical XML Import?

Apr 21, 2006

Hello,

Can anyone point me at a tutorial or sample that shows how to use IS for importing an xml file containing hierarchically arranged records ?



I have a file which contains multiple orders , the orders contain multiple line items.. the file also contains an element with details of the file source etc...



So, I want to make an insert in the FileLog table an then make inserts into the orders table .. then make inserts into the OrderItems table which will have the foreign key from the orders table in the records...



if you get what I mean...

But I have searched hign and low and can't see any info on how to load anything but a very flat xml file structure...



Thanks

Vida.

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Hierarchical Table Functions Vs Hierarchical CTE

Jun 9, 2006

Recently I was in need of a hierarchical tree data. I learned about CTE and how they can be used to build hierarchical data with simple syntax. I used CTE and was through with the task. Later during free time, I tried to compare CTE approach with the traditional SQL 2K Table Function approach. It was surprising to see the query costs when I ran both the modes at one go...

Query Cost (relative to batch) : 0.49%
Query Text : Select * From fn_GetTree(8);

Query Cost (relative to batch) : 99.51%
Query Text : with treedata (id, parentid, status, prevStatus, lvl) as (select ...)


What does that indicate? Does it mean that the Table Function approach is much faster than CTE? I am sure that I was not making unwanted Joins in the CTE mode.

Can someone explain why that huge difference is there? And what the scenarios where CTE is better over Table Functions?

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Hierarchical Data Model

Sep 28, 2007

Hi,

I would like to know best way to design the database for the following requirement. I have a collection of tree nodes. each node has a type and set of attributes and a parent node (except for the node which has no parent). node type refers to the level of the node in the tree. child node inherits the attributes from the parent node (similar to object oriented programming where derived class inherits properties of the base class). user can add/update/delete nodes from the tree and user can choose to override the attributes of the parent node in child node.
what is best way to store this type of data? should there be a separate table for each node type (level in the tree). but the problem with this approach is that we need to duplicate the columns of the parent node, because user can overwrite the parent node attributes in the child node. there can be more than one at the same level and all of them share same set of attributes. this concept is exactly like inheritance in object oriented programming. as far as the data is concerned, there are around 15 levels, around 30K nodes and 30 attributes spread across different node levels.

thanks,
RK

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May 1, 2006

How can I create a function that returns hierarchical data from a table with this structure:

- CategoryID
- CategoryName
- CategoryFather

I want to bring the result set like this...

CategoryID | CategoryName | CategoryFather | HierarchicalLevel
1 | Video | 0 | 0
2 | DivX | 1 | 1
3 | WMV | 1 | 1
4 | Programming | 0 | 0
5 | Web | 4 | 1
6 | ASP.Net | 5 | 2
7 | ColdFusion | 5 | 2


How can I do this? Does anybody has a sample code? I need this on SQL Server 2000 and if it's possible (but not too necessary) in SQL Server 2005.

Thanks.

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Flatten Hierarchical Data

Apr 17, 2008

Hello

I have a problem that I am hoping somebody can help me with!

I have built a hierarchy using the adjacency list model so I have records with an id that maps to the parent record so my hierarchy looks something like this:-

Newspapers

National Newspapers

Daily Express

Express Publications
Express Supplements
Daily Mail

Mail Publications
Mail Supplements
Mirror

So my table would look like below:-

1 Newspapers Null
2 National Newspapers 1
3 Daily Express 2
4 Express Publications 3
5 Express Supplements 3

and so on. What I would like to be able to do is flatten out the hierarchy so I get something like below where each level is in a column.

NewsPapers National Newspapers Daily Express Express Publications
NewsPapers National Newspapers Daily Express Express Supplements

Ive used CTE's for displaying the hierarchy and producing aggregate figures when joing the hierarchy to spend information but am struggling to come up with any code that would produce a flattened hierarchy.

Any help would be greatly received!

Thanks

Rich


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Node ID - Loading Hierarchical Data

Aug 3, 2013

CREATE TABLE #Source
(
Id int identity(1,1)
,categoryint
,Leaf_Node_code varchar(10) --
,Level1_Name varchar(20)
,Level2_Name varchar(20)

[Code] ....

Here category 1 has 3 levels ,

category 2 has 4 levels ,
category 3 has 5 levels ,

Below is the target table, here Leaf_Node_code should populate to only for leaf nodes for each category .. Need to populate Node_id with hierarchical data

I am unable frame a sql query to handle different levels , in future #Source may have more levels .

How to handle multiple hierarchy levels .. here only leaf node should have Leaf_Node_code

CREATE TABLE TARGET_TABLE
(
ID INT IDENTITY(1,1) primary key
,Node_id HIERARCHYID
,category int
,Parent_id int references TARGET_TABLE(id)
,Leaf_Node_code varchar(10)
,Namevarchar(20)
)

Here is the expected output:

IDcategoryParent_idLeaf_Node_codeName Node_id
11NULLNULLWorld
211NULLAsia
312101India
42NULLNULLa
524NULLaa
625NULLaaa
726102aaaa
83NULLNULLb
938NULLbb
1039NULLbbb
11310NULLbbbb
12311103bbbb

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Nov 30, 2013

I have two table. Department is hierarchical table.

Department
--- id (int primary key)
--- name (varchar)
--- parent (int)

Users
--- Id
--- name
--- department_id

This query return all data from departments. But i cannot understand how get data from users

SELECT t1.name AS lvl1, t2.name as lvl2, t3.name as lvl3
FROM Department AS t1
LEFT JOIN Department AS t2 ON t2.parent = t1.id
LEFT JOIN Department AS t3 ON t3.parent = t2.id

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Oct 12, 2007



Hi,
in my application, the data is in hierarchical format. there is a tree with set of nodes having parent child relationships. this data can be stored either through adjacency or nested set model approach. this is fine. but the issue here is that each child node inherits the properties of its parent node, parent's parent node and so on until the root node. lets say root node has two attributes A1 and A2 and they are stored in two columns in a table. but its child nodes inherits this data from its parent and it has its own extra attributes. so should I copy parent's data for the child node as two additional columns? the problem is that there are around 15 levels in the tree and the attribute list grows from top to bottom in the tree. lets say I need to find all the attributes for a leaf node in the tree (both direct and inherited), if I am not storing the inherited attributes for each node, then I need to walk-up the tree and find all the inherited attributes. there are around 30K nodes and each node has around ten attributes. xml is not option because of large volumes of data and auditing and reporting on individual nodes. what is the best way to store this type of data? my current approach is to have an attribute table having nodeid as a foreign key and only store the direct and NOT the inherited attributes of the node in the table, but this means to find all the attributes for the node, I need to gather the attributes of all the parents until the root node. I can't see any easy way out for this.

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Sep 3, 2006

I would like to retrieve a hierarchical list of Product Categories from a single table where the primary key is a ProductCategoryId (int) and there is an index on a ParentProductCategoryId (int) field. In other words, I have a self-referencing table. Categories at the top level of the hierarchy have a ParentProductCategoryId of zero (0). I would like to display the list in a TreeView or similar hierarchical data display control.Is there a way to retrieve the rows in hierarchical order, sorted by CategoryName within level? I would like to do so from a stored procedure. Example data:ProductCategoryID CategoryDescription ParentProductcategoryID ParentCategoryDescription Level------------------------------------------------------------------------------------------------------------------------------------------------1                           Custom Furniture     0                                                                             02                           Boxes                     0                                                                             03                           Toys                       0                                                                             04                           Bedroom                 1                                    Custom Furniture                15                           Dining                     1                                    Custom Furniture                16                           Accessories            1                                    Custom Furniture                17                           Picture Frames        6                                    Accessories                       28                           Serving Trays           6                                    Accessories                       29                           Entertainment          1                                    Custom Furniture                110                         Planes                     3                                    Toys                                  111                         Trains                      3                                    Toys                                  112                         Boats                      3                                    Toys                                  113                         Automobiles             3                                    Toys                                  114                         Jewelry                    2                                    Boxes                                115                         Keepsake                2                                    Boxes                                116                         Specialty                 2                                    Boxes                                1Desired output:Custom Furniture     Accessories          Picture Frames          Serving Trays     Bedroom     Dining     EntertainmentBoxes     Jewelry     Keepsake     SpecialtyToys     Automobiles     Boats     Planes     Trains

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Feb 18, 2008

Hi All,

I am attempting to create a Visual C++ application based on displaying financial charts and am using SQL Express to store Stock information such as the Exchanges the stocks are traded on, the indicessectors they belong to and the Closing prices for as long as I can download data for. I am not proficient in C++ nor SQL and am using this project to learn both languages as well as making myself rich beyond my wildest dreams.

I have "designed" a database with the following tables:

tblDate_ 1 column clmDate (Primary Key, smalldatetime, NOT NULL)

tblStockExchange_ 4 column clmStockExchangeID (PK, int, NOT NULL)
clmParentID (int, null)
clmStockExchange (nvarchar(50), NOT NULL)
clmMarkets_ (FK, nchar(20), NOT NULL)

tblMarkets_ 1 column clmMarkets (PK, nchar(20), NOT NULL)

tblIndices_ 1 column clmIndices (PK, nchar(50), NOT NULL)

tblSectors_ 1 column clmSectors (PK, nchar(50), NOT NULL)

tblMarkets_Sectors 3 columns clmMarkets_SectorsID(PK, int, NOT NULL)
clmMarkets_ (FK, nchar(20), NOT NULL)
clmSectors_ (FK, nchar(50), NOT NULL)

tblSecurities_ 4 columns clmEPIC (PK, nchar(10), NOT NULL)
clmSecurity_Type (nchar(5), NOT NULL)
clmSecurty_Name (nchar(50), NOT NULL)
clmSectors_ (FK, nchar(50), NOT NULL)

tblSecurities_Indices 3 columns clmSecurities_IndicesID (PK, int, NOT NULL)
clmEPIC_ (FK, nchar(10), NOT NULL)
clmIndices_ (FK, nchar(50), NOT NULL)

tblSecurities_Date_OHLCV 8 columns clmOHLCVID (PK, int, NOT NULL)
clmEPIC_ (FK, nchar(10), NOT NULL)
clmDate_ (FK, smalldatetime, NOT NULL)
clmOpen (float, NOT NULL)
clmHigh (float, NOT NULL)
clmLow (float, NOT NULL)
clmClose (float, NOT NULL)
clmVolume (float, NOT NULL)

Why so many tables? perhaps you should put some more in...


This was the only way I could work out how to store one-to-one and one-to-many relationships required for:

- Many closing prices for many stocks
- Stocks belonging to many indices
- Stocks belonging to only one sector
- Stocks belonging to only one market (MainMarket or AIM for LSE)
- Stocks belonging to only one Exchange (I am aware of dual listed stocks but one thing at a time)

Why nchar's and not nvarchar's?

Because I didn't realise the benefits of nvarchar's until recently. How can I change this a loose the extra spaces in the cells.

Why do some tables have IDs and others don't?

I decided to put ID columns in for tables that didn't have obvious Primary Keys - if someone could explain the advantages if ID columns I would be grateful.

To the SQL Professional's eye there will be some obvious things wrong with this design and your criticism is welcome. The database I have is achieving what I would like it to do; I can plot charts using the data but I have ran into problems when trying to create a TreeView control which is what I would like to use as a navigational tool in my application.

It would seem that pulling hierarchal data from a relational database, to pass to the TreeView control, is a tricky task to say the least. I have found many articles online which discuss how to do this (using an Adjacency List Model or Nested Set Model) but they define a fairly simple example at the beginning (based on fruit or electrical goods) but don't appear to talk about gathering data from an existing relational database or changing an existing relational database so that it is more suited to storing hierarchal information. I have Joe Celko's - Tree and Hierachies in SQL for Smarties but sadly this fine material is a little beyond me!

I would like the hierarchy to look like this:

StockExchange

Market

Sector

Stock
Indices

Sector

Stock

I have written three queries to get the StockExchangeMarketSectorStock information individually from each table but am struggling with ways to put all the rows together, add left and right values (Nested Set Model) then run queries against this to get individual nodes to pass to the TreeView control. Therefore is there something I need to add to the original design?

Any help would be greatly appreciated.

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Apr 22, 2015

I have the data in this format

ID        NAME         ParentID
CV1      CV1NAME      CV
CVX1    CVX1NAME    CV1
CVXX1  CVXX1NAME  CVX1
CV2      CV2NAME     CV
CVX2    CVX2NAME    CV2
CVXX2  CVXX2NAME  CVX2

How can i flatten this data into this format

CVID    CVNAME     CVXID   CVXNAME   CVXXID   CVXXNAME
cv1        cv1name  cvx1        cvx1name    cvxx1     cvxx1name
cv2        cv2name  cvx2        cvx2name    cvxx2     cvxx2name

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Transact SQL :: Select Lowest Level From Hierarchical Data

Jun 22, 2015

I have hierarchical data such as:

Id    Level    ParentId
1     0         1
2     1         1
3     2         2
4     0         4
5     1         4
6     0         6
7     1         6
8     2         7
9     3         8        
10   4         9
11   0         11

As you can see even the parent element has parentId(in this case id = parentid)

How can I select the lowest level data in the hierarchy and get this result:

Id    Level    ParentId
3     2         2
5     1         4
10   4         9
11   0         11

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Hierarchical (tree) Data Structure Where A Node Can Have Multiple Parents

May 9, 2008

Hi all!
I am trying to organize a hierarchical data structure into a table. I need to have the possibility to set 2 parents for some nodes. Curently I see following two options:
Example 1
id    parent_id    name-----------------------------------1     0                 Level 1 Parent A2     0                 Level 1 Parent B3     1,2              Level 2 Child
Example 2
id    parent_id    name-----------------------------------1     0                 Level 1 Parent A2     0                 Level 1 Parent B3     1                 Level 2 Child3     2                 Level 2 Child
Is any of the two examples valid database logic wise? In fact, is it possible to achieve the requirement by using only one table?
Thanks in advance,

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SQL Server 2008 :: Query To Show XML Output For Hierarchical Data?

Mar 10, 2015

selecting table data in hierarchical XML .

Here is the sample table DDL and data

Declare @continents Table
(
id int identity (1,1)
,continent_id int
,continent_Name varchar(100)
,continent_surface_area varchar(100)
,country_id int

[code]....

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Better Practices Wanted For Cascading Inserts Of Hierarchical Data From Staging Tables

Aug 28, 2007

I apologize if this has been asked, but I can't find a complete answer.

We have a situation with parent/child tables which have an identity column as their PK. We need to be able to insert into the live tables from staging tables. The data in the staging tables are related via a surrogate key.

I have found the OUTPUT clause, but that can only refer to columns of the actual table (since there is no FROM clause in an INSERT). Our current best solution to this problem involves adding bogus "staging" columns to the destination tables, and removing them after we've inserted everything from staging. This is an unattractive solution to say the least.

I'll give an example that mirrors our actual solution, and ask if anyone has a better solution?
----------




Code Snippet
CREATE TABLE [dbo].[TABLE_A](
[ID] [int] IDENTITY(1,1) NOT NULL,
[DATA] [nchar](10) NOT NULL,
[STAGING_COLUMN] [bigint] NULL,
CONSTRAINT [PK_TABLE_A] PRIMARY KEY ([ID] ASC)
)
GO
CREATE TABLE [dbo].[TABLE_B](
[ID] [int] IDENTITY(1,1) NOT NULL,
[A_ID] [int] NOT NULL,
[DATA] [nchar](10) NOT NULL,
[STAGING_COLUMN] [bigint] NULL,
CONSTRAINT [PK_TABLE_B] PRIMARY KEY ([ID] ASC)
)
GO
ALTER TABLE [dbo].[TABLE_B]
ADD CONSTRAINT [FK_TABLE_A_TABLE_B] FOREIGN KEY([A_ID]) REFERENCES [dbo].[TABLE_A] ([ID])
GO
CREATE TABLE [dbo].[STAGE_TABLE_A](
[A_Key] [bigint] NOT NULL,
[DATA] [nchar](10) NOT NULL
)
GO
CREATE TABLE [dbo].[STAGE_TABLE_B](
[B_Key] [bigint] NOT NULL,
[DATA] [nchar](10) NOT NULL,
[A_Key] [bigint] NOT NULL
)
GO


The STAGING_COLUMN columns are the ones that will be added before, and dropped after.






Code Snippet
DECLARE @TABLE_A_MAP TABLE (
A_ID INT,
A_Key BIGINT
)
INSERT INTO TABLE_A (DATA, STAGING_COLUMN)
OUTPUT INSERTED.ID, INSERTED.STAGING_COLUMN INTO @TABLE_A_MAP
SELECT DATA, A_Key FROM STAGE_TABLE_A
INSERT INTO TABLE_B (A_ID, DATA)
SELECT TAM.A_ID, STB.DATA
FROM STAGE_TABLE_B STB INNER JOIN @TABLE_A_MAP TAM ON TAM.A_Key = STB.A_Key






This seems to work, but I'd really like another alternative. Even though this is happening when nobody else is using the database, I cringe at the thought of adding and removing columns just to make this work.

Here are a few of my constraints:



The above is a simplification of the actual problem. The actual problem goes about five levels deep (hence the B_Key in STAGE_TABLE_B). At the top level, our larger customer will have 100,000 rows to insert. Each level will average 3 times as many rows as the next higher level, so we're talking about real volumes here.

This has to finish over the course of a weekend.

This has to be delivered to QA this Friday
Thanks for any help or insight.

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SQL Server Import And Export Wizard Fails To Import Data From A View To A Table

Feb 25, 2008

A view named "Viw_Labour_Cost_By_Service_Order_No" has been created and can be run successfully on the server.
I want to import the data which draws from the view to a table using SQL Server Import and Export Wizard.
However, when I run the wizard on the server, it gives me the following error message and stop on the step Setting Source Connection


Operation stopped...

- Initializing Data Flow Task (Success)

- Initializing Connections (Success)

- Setting SQL Command (Success)
- Setting Source Connection (Error)
Messages
Error 0xc020801c: Source - Viw_Labour_Cost_By_Service_Order_No [1]: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "SourceConnectionOLEDB" failed with error code 0xC0014019. There may be error messages posted before this with more information on why the AcquireConnection method call failed.
(SQL Server Import and Export Wizard)

Exception from HRESULT: 0xC020801C (Microsoft.SqlServer.DTSPipelineWrap)


- Setting Destination Connection (Stopped)

- Validating (Stopped)

- Prepare for Execute (Stopped)

- Pre-execute (Stopped)

- Executing (Stopped)

- Copying to [NAV_CSG].[dbo].[Report_Labour_Cost_By_Service_Order_No] (Stopped)

- Post-execute (Stopped)

Does anyone encounter this problem before and know what is happening?

Thanks for kindly reply.

Best regards,
Calvin Lam

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Oct 16, 2006

I am attempting to import data from Microsoft Access databases to SQL Server 2000 using the DTS Import/Export Wizard. I have a few errors.

Error at Destination for Row number 1. Errors encountered so far in this task: 1.
Insert error column 152 ('ViewMentalTime', DBTYPE_DBTIMESTAMP), status 6: Data overflow.
Insert error column 150 ('VRptTime', DBTYPE_DBTIMESTAMP), status 6: Data overflow.
Insert error column 147 ('ViewAppTime', DBTYPE_DBTIMESTAMP), status 6: Data overflow.
Insert error column 144 ('VPreTime', DBTYPE_DBTIMESTAMP), status 6: Data overflow.
Insert error column 15 ('Time', DBTYPE_DBTIMESTAMP), status 6: Data overflow.
Invalid character value for cast specification.
Invalid character value for cast specification.
Invalid character value for cast specification.
Invalid character value for cast specification.
Invalid character value for cast specification.

Could you please look into this and guide me
Thanks in advance
venkatesh
imtesh@gmail.com

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Jan 7, 2004

Hello:

I am not sure how to implement the following, but I believe it entails using DTS, and hopefully it is fine that I post it here b/c ultimately I will need this backend data for my frontend .aspx pages:

On a weekly basis, I need to IMPORT some data located on a remote Oracle DB into SQL Server 2k. Since there is so much data to transfer, I would only like to transfer the data that is new to the table since the last IMPORT, i.e. a week ago and leave behin the OLD data.

Is DTS the correct way to go or do I have more control via DTS with STORED PROCEDURES? Does anyone have any good references for me?

On a similar note, once this Oracle data is IMPORTED into a certain table, I would like to EXPORT some of these NEWLY acquired rows matching certain criteria into another table for auditing purposes. For this scenario, should I implement a TRIGGER UPDATE event here on the first table?

Any advice will be greatly appreciated!

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Mar 27, 2008

I am designing database that will store clinic and doctor information.

1) A clinic can have doctors and staff members.
2) A clinic can belong to another clinic.
3) A doctor can practice on his/her own practice/clinic and still belong to another clinic.

I will email my current design if needed.

Thanks,

Stephen Cantoria
scantoria@msn.com

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Aug 23, 2006

I have a table consisting of 3 columns: Parent varchar(50), Child varchar(50), Pop int.

The table is setup as follows:

Parent Child Pop
----------------------------------
Europe France 0
France Paris 1
New York New York City 10
North America United States 0
North America Canada 0
United States New York 0
United States Washington 0
Washington Redmond 200
Washington Seattle 100
World Europe 0
World North America 0

This is just some sample data modified a tiny bit from an example of a hierachical print out sample that is a stored procedure that allows me to pass any place and see all of that place's children/grandchildren.

I need to figure out how to write a query to show me cumulative sums (ROLLUP?) of the whole tree. So the output should basically be something like this (it can include parent and child columns too):

World Null 311
World Europe 1
Europe France 1
France Paris 1
World North America 310
North America United States 310
North America Canada 0
United States New York 10
United States Washington 300
New York New York City 10
Washington Redmond 200
Washington Seattle 100

Hopefully you understand what i'm looking for. I've tried using WITH ROLLUP and I also tried using an Inner Join but I'm not really sure what I need to do to pull this off. I seem to only be able to get it to work 1-2 levels deep but not through the whole tree.

Any help/ideas would be appreciated! Thank you.

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Oct 25, 2007

Hello,

i want to import data from an excel sheet into a database. While reading from the excel sheet OleDb automatically guesses the Datatype of each column. My Problem is the first A Column which contains ~240 Lines. 210 Lines are Numbers, the latter 30 do contain strings. When i use this code:







Code BlockDim sConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & conf_path_current & file_to_import & ";Extended Properties=""Excel 8.0;HDR=NO"""
Dim oConn As New OleDb.OleDbConnection(sConn)
Dim cmd1 As New System.Data.OleDb.OleDbCommand("Select * From [Table$]", oConn)
Dim rdr As OleDb.OleDbDataReader = cmd1.ExecuteReader
Do While rdr.Read()
Console.WriteLine(rdr.Item(0)) 'or rdr(0).ToString
Next




it will continue to read the stuff till the String-Lines are coming.
when using Item(0), it just crashes for trying to convert a DBNull to a String, when using rdr(0).ToString() it just gives me no value.

So my question is how to tell OleDB that i want that column to be completly read as String/Varchar?

Thanks for Reading

- Pierre from Berlin


[seems i got redirected into the wrong forum, please move into the correct one]

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Jul 13, 2007

I'm moving data between identical tables and have to use a flat file as an intermediary. I thought: "No problem, SSIS can do a quick export to a file, then move the file to another server, then use SSIS to import the data to the new server."



Seems simple, right?



I'm hitting all sorts of surprising data conversion errors. I used the export wizard to create the export package. This works fine. However using the same flat file definition, the import package fails -- even when I have no destination. That is I have just one data flow task that contains only one control: the Flat File source. When I run the package the flat file definition fails with data type conversion and truncation errors. One of the obvious errors is for boolean types. The SQL field is a bit, SSIS defined the column as DT_BOOL, the output of the data are literal text values "TRUE" and "FALSE". So SSIS converts a sql datatype of bit to "TRUE" and "FALSE" on export, but can't make the reverse conversion on import?



Does anyone else find this surprising? I would expect that what SSIS exports, it can import given all the same table and flat file definitions. Is SSIS the wrong tool to do such simple bulk copies? I'd like to avoid using BCP because this process will need to run automatically within SQL Agent so we can leverage all the error tracking and system monitoring.



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Jun 7, 2006

I need to periodically import a (HUGE) table of data from an external data source (not SQL Server) into SQL Server, with the following scenarios:
Some of the records in the external data source may not exist in SQL.Some of the records in the external data source may have a different value at different imports, but this records are identified univocally by the same primary key in the external datasource and in SQL Server.Some of the records in the external data source may be the same in SQL.

Due to the massive volume of the import, I would like to import only the records which are different from what I have in SQL Server (cases 1 and 2 above). In fact case 2 is the most critical.

I thought of making a query with a left outer join between the data in the external data source table (SOURCE) and the data in the SQL Server table (DESTIN). The join is done on the respective primary keys (composed keys of up to 10 columns) and one of the WHERE conditions will be that the value in SOURCE is different from the value in DESTIN.

The result of this query would be exactly what I need to import.
How to do this in SSIS??? I couldn't figure out how to join tables in different data sources yet.

In fact I cannot write a stored procedure to do that, since one of the sources is in a datasources not SQL Server.
I have seen the Lookup transformation in this article http://www.sqlis.com/default.aspx?311 but this is not exacltly what I want to do.
Another possibility is to use the merge join, but due to the sorting I believe its performances would be terrible!

Thanks in advance for your suggestions!

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Thanks!!
Tram

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[Code] ....

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with TempCTE(id, Name, level, sortcol)
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from Table1
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union all

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My problem is I want to sort this hierarchical resultset further on name like

aaa
-----aaaa
-----bbbb
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I am with SQL Server 2005 Standard Edition with SP2.

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