Comments on: SQL SERVER – Simple Example of Recursive CTE http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/ Notes of a SQL Server MVP and Database Administrator Sat, 21 Nov 2009 05:54:09 +0000 http://wordpress.com/ hourly 1 By: Neel http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-56542 Neel Thu, 08 Oct 2009 20:13:13 +0000 http://sqlauthority.wordpress.com/?p=748#comment-56542 Thanks for sharing it.. I was studing CTEs wnd WITH vigorously. Since CTEs are used for recursive executions, I tried to use CTE to solve my below problem, is there any way you think it could be done with CTE? table1: ack SeqId freq_type 1 1 9 1 2 9 1 3 9 1 4 9 1 5 9 1 6 5 1 7 5 1 8 5 1 9 9 1 10 9 1 11 9 Result should be: ack SeqId freq_type 1 1 9 1 6 5 1 9 9 The logic shoolud be keep looping freq_type column untill it's last value changes..If changed then add it to resultset... I thought and concluded that result can be achived if SQL in recursive section could support 'top' clauses.. any thoughts? thanks for all your articles. Thanks for sharing it.. I was studing CTEs wnd WITH vigorously. Since CTEs are used for recursive executions, I tried to use CTE to solve my below problem, is there any way you think it could be done with CTE?

table1:
ack SeqId freq_type
1 1 9
1 2 9
1 3 9
1 4 9
1 5 9
1 6 5
1 7 5
1 8 5
1 9 9
1 10 9
1 11 9

Result should be:

ack SeqId freq_type
1 1 9
1 6 5
1 9 9

The logic shoolud be keep looping freq_type column untill it’s last value changes..If changed then add it to resultset…

I thought and concluded that result can be achived if SQL in recursive section could support ‘top’ clauses..

any thoughts?

thanks for all your articles.

]]> By: marco http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-53176 marco Mon, 22 Jun 2009 21:24:20 +0000 http://sqlauthority.wordpress.com/?p=748#comment-53176 This exact question was in the MCTS 70-433 exam. Did you take it from there or did you microsoft used it from here?? This exact question was in the MCTS 70-433 exam. Did you take it from there or did you microsoft used it from here??

]]> By: Shriram http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-51207 Shriram Wed, 22 Apr 2009 11:25:15 +0000 http://sqlauthority.wordpress.com/?p=748#comment-51207 Hi , Can i use a CTE for this scenario: I have a transaction table with an id column and a name column and also i have master table with the same id column. I need to concatenate all names for each id present in both tables and display it as a comma separated string along with the id I dont want to use cursors or loops Please help. Thanks in advance Hi ,

Can i use a CTE for this scenario:
I have a transaction table with an id column and a name column and also i have master table with the same id column.
I need to concatenate all names for each id present in both tables and display it as a comma separated string along with the id

I dont want to use cursors or loops

Please help.

Thanks in advance

]]> By: 怀恋春晨 http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-51089 怀恋春晨 Sat, 18 Apr 2009 06:50:44 +0000 http://sqlauthority.wordpress.com/?p=748#comment-51089 Pinal, You would get the same result by running a simple SELECT...I still don't see the usage of recursive CTE in this case, or is it just a different way of getting same result? Could you provive some scenarios for R. CTE? Thanks! SELECT EmployeeID, ContactID, LoginID, ManagerID, Title, BirthDate FROM HumanResources.Employee order by ManagerID Pinal,

You would get the same result by running a simple SELECT…I still don’t see the usage of recursive CTE in this case, or is it just a different way of getting same result? Could you provive some scenarios for R. CTE? Thanks!

SELECT EmployeeID, ContactID, LoginID, ManagerID, Title, BirthDate
FROM HumanResources.Employee
order by ManagerID

]]> By: Real Drouin http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-49221 Real Drouin Mon, 16 Mar 2009 21:14:03 +0000 http://sqlauthority.wordpress.com/?p=748#comment-49221 It's working well but I have an issue. Let say that I for each manager I want to sort the employee by hiring date. How can I do that ? It’s working well but I have an issue. Let say that I for each manager I want to sort the employee by hiring date.

How can I do that ?

]]> By: SQL SERVER - 2008 - Interview Questions and Answers - Part 6 Journey to SQL Authority with Pinal Dave http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-47476 SQL SERVER - 2008 - Interview Questions and Answers - Part 6 Journey to SQL Authority with Pinal Dave Thu, 26 Feb 2009 12:05:15 +0000 http://sqlauthority.wordpress.com/?p=748#comment-47476 [...] CTE is an abbreviation Common Table Expression. A Common Table Expression (CTE) is an expression that can be thought of as a temporary result set which is defined within the execution of a single SQL statement. A CTE is similar to a derived table in that it is not stored as an object and lasts only for the duration of the query. (Read More Here) [...] [...] CTE is an abbreviation Common Table Expression. A Common Table Expression (CTE) is an expression that can be thought of as a temporary result set which is defined within the execution of a single SQL statement. A CTE is similar to a derived table in that it is not stored as an object and lasts only for the duration of the query. (Read More Here) [...]

]]> By: Palanivel http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-45229 Palanivel Wed, 31 Dec 2008 11:18:59 +0000 http://sqlauthority.wordpress.com/?p=748#comment-45229 Hi Pinal Is there any Possiblility to use CTE in entire Stored procedure like Temp table. if i use CTE table more than one time its showing 'invalid object name'. Thanks & Regards R. Palanivel Hi Pinal

Is there any Possiblility to use CTE in entire Stored procedure like Temp table. if i use CTE table more than one time its showing ‘invalid object name’.

Thanks & Regards
R. Palanivel

]]> By: Rahul Jain http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-45130 Rahul Jain Sat, 27 Dec 2008 14:48:39 +0000 http://sqlauthority.wordpress.com/?p=748#comment-45130 Hi, I've following problem, which I've not been able to do successfully. Your help will be appreciated. Table has following 2 columns DocNum DocEntry 1 234 2 324 2 746 3 876 3 764 4 100 4 387 Expected result is as follow 1 234 2 324, 746 3 876, 764 4 100, 387 Thanks Rahul Jain Hi,

I’ve following problem, which I’ve not been able to do successfully. Your help will be appreciated.

Table has following 2 columns

DocNum DocEntry
1 234
2 324
2 746
3 876
3 764
4 100
4 387

Expected result is as follow

1 234
2 324, 746
3 876, 764
4 100, 387

Thanks
Rahul Jain

]]> By: Preeti Muley http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-41342 Preeti Muley Tue, 05 Aug 2008 10:37:28 +0000 http://sqlauthority.wordpress.com/?p=748#comment-41342 Hi Pinal I do have a query in Oracle as follows SELECT (BALLOT_DATA.BALLOT_FROM + (BALLOT_NO -1)) AS BALLOT_NO, ELECTION.ELEC_PK, ELECTION_AREAS.NAME AS ELECTION_AREA, BD_PK, BALLOT_DATA.PO_PK, BALLOT_DATA.SYSTEMID, PREFIX, SUFFIX, BALLOT_FROM, BALLOT_TO, BALLOT_NO AS RELATIVE_BALLOT_NO FROM ( SELECT ROWNUM BALLOT_NO FROM DUAL CONNECT BY ROWNUM <= 10000) BALLOT_PAPERS, BALLOT_DATA, ELECTION, ELECTION_AREAS WHERE BALLOT_PAPERS.BALLOT_NO <= BALLOT_DATA.ORDINARY_COUNT AND ELECTION.ELEC_PK = 10 AND ELECTION_AREAS.ELA_PK = 35 can you suggest me the solution? Hi Pinal I do have a query in Oracle as follows
SELECT
(BALLOT_DATA.BALLOT_FROM + (BALLOT_NO -1)) AS BALLOT_NO,
ELECTION.ELEC_PK,
ELECTION_AREAS.NAME AS ELECTION_AREA,
BD_PK,
BALLOT_DATA.PO_PK,
BALLOT_DATA.SYSTEMID,
PREFIX,
SUFFIX,
BALLOT_FROM,
BALLOT_TO,
BALLOT_NO AS RELATIVE_BALLOT_NO
FROM
(
SELECT
ROWNUM BALLOT_NO
FROM
DUAL CONNECT BY ROWNUM <= 10000) BALLOT_PAPERS,
BALLOT_DATA, ELECTION, ELECTION_AREAS
WHERE
BALLOT_PAPERS.BALLOT_NO <= BALLOT_DATA.ORDINARY_COUNT AND
ELECTION.ELEC_PK = 10 AND
ELECTION_AREAS.ELA_PK = 35
can you suggest me the solution?

]]> By: ayman yassin http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-41275 ayman yassin Mon, 04 Aug 2008 08:51:22 +0000 http://sqlauthority.wordpress.com/?p=748#comment-41275 thanks alot thanks alot

]]> By: Jessy . K http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-41044 Jessy . K Wed, 30 Jul 2008 09:34:32 +0000 http://sqlauthority.wordpress.com/?p=748#comment-41044 Hi, Can u tell me the books to study about SQL SERVER for the beginner. Hi,
Can u tell me the books to study about SQL SERVER for the beginner.

]]> By: manumik http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-40978 manumik Tue, 29 Jul 2008 13:07:45 +0000 http://sqlauthority.wordpress.com/?p=748#comment-40978 Very interesting! Very interesting!

]]> By: Niyaz http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-40974 Niyaz Tue, 29 Jul 2008 12:29:19 +0000 http://sqlauthority.wordpress.com/?p=748#comment-40974 very useful ! Thanks alot. very useful !

Thanks alot.

]]> By: Kamran Shahid http://blog.sqlauthority.com/2008/07/28/sql-server-simple-example-of-recursive-cte/#comment-40881 Kamran Shahid Mon, 28 Jul 2008 06:12:07 +0000 http://sqlauthority.wordpress.com/?p=748#comment-40881 Thanks Pinal. Now I am able to understand it Thanks Pinal.
Now I am able to understand it

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