Hi,
I hope someone here can help me.
We have a product table which has a many-to-many relation
to a category table (joined through a third "ProductCategor y" table):
[product] ---< [productCategory] >--- [category]
--------- ---------------- ----------
productID productCategory ID categoryID
productName productID categoryName
categoryID
We want to get a view where each product occupies just one row, and
any multiple category values are combined into a single value, eg
(concatenating with commas):
Product Category
-------------------
cheese dairy
cheese solid
milk dairy
milk liquid
beer liquid
will become:
Product Category
-------------------
cheese dairy, solid
milk dairy, liquid
beer liquid
What is the best way to do it in SQL?
Thanks and regards,
Dmitri
4  24719 
"mitmed" <mi****@yahoo.c om> wrote in message
news:c2******** *************** ***@posting.goo gle.com... Hi,
I hope someone here can help me.
We have a product table which has a many-to-many relation
to a category table (joined through a third "ProductCategor y" table):
[product] ---< [productCategory] >--- [category]
--------- ---------------- ----------
productID productCategory ID categoryID
productName productID categoryName
categoryID
We want to get a view where each product occupies just one row, and
any multiple category values are combined into a single value, eg
(concatenating with commas):
Product Category
-------------------
cheese dairy
cheese solid
milk dairy
milk liquid
beer liquid
will become:
Product Category
-------------------
cheese dairy, solid
milk dairy, liquid
beer liquid
What is the best way to do it in SQL?
Thanks and regards,
Dmitri
The usual answer is that you should do this in the client, not in TSQL, but
if you must then the only reliable way is using a cursor. http://www.aspfaq.com/show.asp?id=2279
Simon
Thanks for your reply Simon,
I completely agree with you that the best place for this type of code
is on the client side. The issue is that my client side is a Crystal
Report (in VB.NET) and i don't know how to do this kind of processing
there. The report i'm trying to produce is the list of products and
their details including categories a product belongs to. I would
really appreciate if somebody could point me to a good crystal report
resource, where it shows how to do things like that if it's possible.
Regards,
Dmitri
"Simon Hayes" <sq*@hayes.ch > wrote in message news:<41******* *@news.bluewin. ch>... "mitmed" <mi****@yahoo.c om> wrote in message
news:c2******** *************** ***@posting.goo gle.com... Hi,
I hope someone here can help me.
We have a product table which has a many-to-many relation
to a category table (joined through a third "ProductCategor y" table):
[product] ---< [productCategory] >--- [category]
--------- ---------------- ----------
productID productCategory ID categoryID
productName productID categoryName
categoryID
We want to get a view where each product occupies just one row, and
any multiple category values are combined into a single value, eg
(concatenating with commas):
Product Category
-------------------
cheese dairy
cheese solid
milk dairy
milk liquid
beer liquid
will become:
Product Category
-------------------
cheese dairy, solid
milk dairy, liquid
beer liquid
What is the best way to do it in SQL?
Thanks and regards,
Dmitri
The usual answer is that you should do this in the client, not in TSQL, but
if you must then the only reliable way is using a cursor.
http://www.aspfaq.com/show.asp?id=2279
Simon
mitmed (mi****@yahoo.c om) writes: I completely agree with you that the best place for this type of code
is on the client side. The issue is that my client side is a Crystal
Report (in VB.NET) and i don't know how to do this kind of processing
there. The report i'm trying to produce is the list of products and
their details including categories a product belongs to. I would
really appreciate if somebody could point me to a good crystal report
resource, where it shows how to do things like that if it's possible.
We use Crystal in our system (and we hate it!), but we never let Crystal
near SQL Server itself. The "database" we tell Crystal about is text files
with all the columns. The actual queries are submitted from VB6, and then
we feed Crystal one of more recordsets, typically augmented with other stuff
that the VB code puts in.
Exactly how that translates to in VB .Net I don't know, although it is
possible to work with ADO Recordset if you use the OleDb .Net data
provider. Then again, who wants to use ADO recordsets if you are in .Net?
I should add that my notion of how we use Crystal is somewhat foggy. I
try to stay away from Crystal as much as I can.
--
Erland Sommarskog, SQL Server MVP, es****@sommarsk og.se
Books Online for SQL Server SP3 at http://www.microsoft.com/sql/techinf...2000/books.asp This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Nick Heppleston |
last post by:
I have a concatenation problem and I was wondering if somebody might be
able to offer some help :-)
I have the following table structure holding product long descriptions:
Part No (pn) Sequence (seq) Long Description (long_desc)
--------------- --------------- ----------------------------------------
HL1450 10 This is part of a long description and
HL1450 20 it overlaps onto several lines. I'm
HL1450 30 having difficulty writing...
|
by: Smythe32 |
last post by:
Hi,
I have the following table:
Project Name email_addr
happy jane.smith@happy.com
happy john.smith@lappy.com
happy mary.smith@happy.com
sad john.smith@lappy.com
paper mary.smith@happy.com
|
by: Dixie |
last post by:
I have the results of a query to send to a mailmerge with Word 2000. The
query produces say 6 to 8 records, where only 1 of the fields is different
from record to record. I can only have one record for my mail merge, so I
would like to concatenate the 6 to 8 records into 1 with the text field that
is different in each record being concatenated into a single text field with
a carriage return/line feed at the end of each record so it comes...
|
by: metamorphiq |
last post by:
Hello,
I'm a Java programmer, so I'm probably asking a very simple question
here, but I have trouble solving it :)
I'd like to know how you concatenate multiple (4, in my case) char* in
C++, and have the result as a char*.
I first tried using strcat, but you need a const char* as the second
parameter to work, but I don't know all the issues regarding const
chars, so maybe I overlooked something.
|
by: Dan |
last post by:
Hi all, I am creating a search table where the keywords field is made
up of several text fields and this is causing me some problems. I can
concatentate the text ok but i can't seem to concatenate matching
records here is the cursor loop. I'm not a fan of cursors but also
didn't see another way of achieving this.
declare @ptr1 varbinary(16)
declare @Ptr2 varbinary(16)
declare @profileid int
declare @x int
| | |
by: assgar |
last post by:
Hi
I was using a schroll bar to display multiple rows of dynamically created from database records.
The scrolling was not displaying the data properly so I have decided to use pagination.
The problem I am having is,
if I select one item on page #1 and another on page #5
only the last item selected on page #5 is stored in the array.
How can I store selections from multiple pages into one array?
|
by: Aaron Hoffman |
last post by:
Hello,
I'm hoping someone might be able to offer some guidance to my problem.
I have one query in MS Access which consists of 2 tables joined by a
SEQUENCE_ID. By joining the two tables I am able to produce a query
that gives me two fields, Part_Number and Product_Type. Below you can
see some sample data:
Part_Number Product_Type
10MC35231 XYZ1A
|
by: bonneylake |
last post by:
Hey Everyone,
Well recently i been inserting multiple fields for a section in my form called "serial". Well now i am trying to insert multiple fields for the not only the serial section but also the parts section an i seem to be having trouble.
When i try to insert into the parts section i get the error Invalid character value for cast specification. But not sure what i am doing wrong. Here is what i am using to insert. All the sections...
|
by: bonneylake |
last post by:
Hey Everyone,
Well i am not sure if this is more of a coldfusion problem or a javscript problem. So if i asked my question in the wrong section let me know an all move it to the correct place.
what i am trying to display previously entered multiple fields. I am able to get my serial fields to display correctly, but i can not display my parts fields correctly.
Currently this is what it does
serial information 1
parts 1
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
| | |
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| | |
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| |
