Db2 concatenate rows into one column

By using this site, you agree to our updated Privacy Policy and our Terms of Use. Manage your Cookies Settings. Join Now login. Ask Question. Is it possible to combine multiple rows returned from select statement into one row? Dec 7 ' Post Reply.

Share this Question. Knut Stolze. Antanas wrote: Is it possible to combine multiple rows returned from select statement into one row? Use recursive SQL to do the concatenation. Examples are posted here every few weeks Thanks Knut.

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Serge Rielau. This is quickly turning into a FAQ. What's going on all of a sudden?

Rolling up multiple rows into a single row and column for SQL Server data

Wat is this used for? Ideally pretty printing is the job of your application. Dec 8 ' The basic principle of a tiered architecture is that display is done in the front end and never in the back end.

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That might help someone maintian the code and correct it after you are gone. Buck Nuggets. There are perfectly legitimate reasons for collapsing multiple rows into one on the back end. Perhaps you've got a presentation team that needs all the items on a single row - to avoid expanding their result set?

You could just write a query for them they might not be able tobut maybe it's safer to put that into a view and support it on the back end. Or maybe someone has a commercial product, or an interface to a commercial product. And in this case they don't give you the option of adding an entire table to describe your list well - they only give you a single column.

You'll have to make do. But other than that, your comment was probably very valuable. Dec 9 ' This discussion thread is closed Start new discussion.

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Similar topics How to delete multiple rows in a GridView?I need a way to roll-up multiple rows into one row and one column. In essence I needed to convert something that looked like this:. Original SubCategories Listing. For this solution we will use the PATH option will explain these four option in more detail in a later post.

You will notice that you get a formatted XML string without a root node. CSV Result. It works easily for One column, what about another column consisting multiple brands for each category… add the brand column to existing table. Prjtname Programmers Client 01 ave dee, law, amy zica. This site uses Akismet to reduce spam. Learn how your comment data is processed. Carlos Ferreira A blog based on Microsoft Technologies.

December 19, by Carlos Ferreira 4 Comments. The Problem: I need a way to roll-up multiple rows into one row and one column. Name, SC. USE AdventureWorks. Name. ProductCategoryID. SubCategories formatted data. Stuff result of the query listed above, 1, 1, ''. Stuff result of the query listed above11''. ProductCategory CAT. USE AdventureWorks Name AS [ Category ] .Greetings, Would it be possible to construct SQL to concatenate column values from multiple rows?

Platform is DB2 V Forum Rules. Home Services Forums Advertise Contact. Login to Your Account. Remember Me? Concatenate column values from multiple rows Greetings, Would it be possible to construct SQL to concatenate column values from multiple rows? Knut Stolze Guest. Re: Concatenate column values from multiple rows Thanks Knut!

It returned what was expected. One problem is its reponse time. Here is the result of running it in db2batch: Stats: 1 MyTable: 80, rows of 97 bytes record length 2 x: 15, rows of 85 bytes record length Elapsed Time s The query was run after reorg.

Best Regards, Nek. Re: Concatenate column values from multiple rows Thanks Knut. Yeah, I tried to look for solution like 'select key, getaggregate key Admittedly it is a table design flaw. The temporary solution is to pass all rows returned for the key to reporting tools such as Business Objects or Crystal Reports where they can be massaged.

I'll experiment the aggregate option you suggested, hopefully with better response time.

How to concatenate multiple columns in a DB2 select statement to return a single column

Knut Guest. Can you concatenate recordset values in one field? By tim-p in forum Dreamweaver AppDev. How to concatenate rows of data into one field? Bookmarks Bookmarks del. All times are GMT. The time now is AM.I came across a situation where I have to concatenate multiple rows a column into single string of text for reporting purpose. There are multiple ways to concatenate rows into string. Now we will see a couple of the easiest techniques here.

NOTE: If you notice the result produced by this method, there is a space added after every country name. Once the path specified as datathe value is treated as an atomic value and a space char is added to the XML. An example query without data part is below. All you have to do is, declare a varchar variable and inside the coalesce, concat the variable with comma and the column, then assign the COALESCE to the variable.

You may need a stored procedure or a function to do this operation and get the concatenated string value. Unfortunately it will be available in the feature release of SQL Server.

This new function is available from SQL Server onwards. In example1 there is a space after every country name. How do you get rid of that space where does it come from. The space is because of using data. A space character is added to the XML if the next item in the serialization is also an atomic value. Another option for row concatenation within categories, by using a correlated sub-query you can achieve similar levels of flexibility with a lot less code. Here is another idea about how you can achieve the same using recursive CTE.

Is very flexible and can be enhanced thoroughly, but I want to show only the proof of concept.

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Hi Cristinel Boboc, Good Idea. Thank you for sharing. Hi, this is great. My doubt would be, what if we would like to have some 2 columns grouped? Say on this example, you would have another column with the continent and then the xml string with the countries within that group, can that be done using this function? This site uses Akismet to reduce spam. Learn how your comment data is processed.

HI Beaulin Twinkle, Thanks nice article. Sanket Patel. Beaulin Twinkle. Hi Sanket Patel, Happy to know that it is helpful to you. Hi Bart, The space is because of using data. Thank you Erik, Your method is short and works great.Is this what you are asking?

I think I just made up a portmanteau But I need the output as below with all the values in separate columns not in one. If you want to try using plain SQL and your data is only numeric then Graham Birchalls excellent cookbook has a section "Transpose Numeric Data" from which you could learn Consider carefully the reason why you need the data in the way you describe.

Keep in mind that a 4KB pagesize allow a max of columns, while other pagesizes allow a max of columns. Current SQL does'nt handle a variable number of columns, hence going via a comma-separated character string might give partial help, as with the following V9. Data Management. Some name 5k Followers. Tech Sign In Page.

Forgot Password? Don't have an account? Sign up. Can i pass vin dynamically Regards Ankur. Ankur Srivatsava. Follow Tech Sign In Page. Ankur, I am having a hard time deciphering your question Thanks fitz.

April 18, AM. Something went wrong on our end. Please try again later. Regards Ankur. I thought you would have been able to use this as a base and modify it for your needs April 18, PM. April 20, AM. April 23, AM. Sign In to Post a Comment. Sign In. Hide Comments View Comments. Looking for more? Browse resources on IBM Db2. Search the archive of solutions and how-to's.

db2 concatenate rows into one column

Ask a new question to a community of peers. Hybrid Transactional and Analytics Processing with Db2.I need a way to roll-up multiple rows into one row and one column. I know I can roll-up multiple rows into one row using Pivotbut I need all of the data concatenated into a single column in a single row. In this tip we look at a simple approach to accomplish this. Rolling up data from multiple rows into a single row may be necessary for concatenating data, reporting, exchanging data between systems and more.

This can be accomplished by:.

Two Rows in One Cell

Check out the example below to walk through the code samples and final solution to roll-up multiple rows into a single row in SQL Server. Before we begin, we'll create some tables and sample data which the following script will do for us.

Before going to the examples, we need to understand the workings of the commands mentioned above. With this we can insert, replace or remove one or more characters. To do this we can use the STUFF command as follows to replace the first ; in the string with an empty string. We will use the PATH option, which generates single elements for each row returned. Now that we see what each of these commands does we can put these together to get our final result.

For each value from the inner query we are concatenating a ";" and then the actual value to have all of the data from all rows concatenated into one column. The below is the output for this query. Here is an example that will rollup indexes into one row and show the columns that are part of the index as well as included columns if any exist. There are always several options to complete a task within SQL Server and we should take the time to explore the capabilities offered by the database before developing large and complex code.

I hope this is one more of those examples that shows there are sometimes easier approaches than you think might be available. Post a comment or let the author know this tip helped. All comments are reviewed, so stay on subject or we may delete your comment. Note: your email address is not published.

Signup for our newsletter. I have read the privacy statement and understand I may unsubscribe at any time. Your SQL has an error.Thanks in advance for coding help!! After some trial and error quite a lot actually I found this worked:. This produces two columns, the first with the workdept and the second with a csv string of the employee numbers:.

Terms of Service Privacy Policy Contact. Login Request Login. Toggle navigation. Lori Bewley. Roy Boxwell. I'm sure this has been answered before but I couldnt' find it in the archives. Lori End Original Message Lynne Flatley. Christian Nymphius, Dr.

db2 concatenate rows into one column

Myron Miller. What is OLAP table? And is this not limited to a max of only 4 authorizations? What happens if there could be more — say up to ? That would mean I have to list each one as min, etc? That seems less than elegant and more brute force? What am I not understanding about this?

November 30, AM in response to Myron Miller Myron This is a solution, if you want to get each value in a seperate column. With the recursive solution, you will get all values in one single column. So both resultsets only look alike, but are in fact different. And you are right, for each additional column you have to add one more OLAP-expression.

db2 concatenate rows into one column

I don't know of any solution, using SQL, to generate an arbitrary number of columns. The rresult of a query is always a table and the number of columns of any table is fixed. OLAP-table is just the table-name, I used to run this query, which contains some sample data.

Sorry for confusion. Daniel Luksetich. Yes, this sort of table pivoting technique is dependent upon the assumption that there is a limited domain. Joe Geller. Not pretty and probably not cheap, and kind of silly. Here is an example using the employee table of the sample database. However, I do not have time to figure out how to get rid of the last comma. Thanks so much, Lori Bewley.

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