Depicting multiple rows' data in one row

Question

Hi All,
Pls. check the below query:
select manager_id mg_id, employee_id emp_id, last_name name from employees
where manager_id = '100'
and DEPARTMENT_ID = '80'if i run the following query, then o/p comes row wise; like below:
       mg_id           emp_id            name
       100             145                     Russell
       100             146                     Partners
       100             147                     Errazuriz
       100             148                     Cambrault
       100             149                     Zlotkeybut if i want the o/p like below; i.e; under manager # 100, all employees' emp_id and name should come in only ONE row NOT in multiple rows:
mg_id                   emp_id     name          emp_id       name       emp_id     name         emp_id     name                emp_id         name
100                             145             Russell     146       Partners        147     Errazuriz       148              Cambrault        149        Zlotkeypls. help me to sort out the above sought o/p.
kindly tell me if there is any posting guidelines (except "Plain Text Help" on the right side) in this forum. i tried a lot to post above two o/p in easily readable format, but couldn't do that.
Edited by: Shariful on Sep 20, 2009 4:28 AM
Edited by: Shariful on Sep 20, 2009 4:29 AM

Answer 1

Hi,
Shariful wrote:
Hi All,
Pls. check the below query:
select manager_id mg_id, employee_id emp_id, last_name name from employees
where manager_id = '100'
and DEPARTMENT_ID = '80'
if i run the following query, then o/p comes row wise; like below:
mg_id           emp_id            name
100     145     Russell
100     146     Partners
100     147     Errazuriz
100     148     Cambrault
100     149     Zlotkey
but if i want the o/p like below; i.e; under manager # 100, all employees' emp_id and name should come in only ONE row NOT in multiple rows:
mg_id                   emp_id     name          emp_id       name       emp_id     name         emp_id     name                emp_id         name
100     145     Russell     146     Partners     147     Errazuriz     148     Cambrault     149     ZlotkeyIf you want all the emp_ids and names concatenated into one big VARCHAR2 column, that's called String Aggregation
[AskTom.oracle.com|http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2196162600402] shows several different ways to do it.
You can format that one big column so that it looks like separate columns.
If you want each emp_id and name in its own column, that's called Pivoting .
Look up "pivot" for various techniques. If you do not know exactly how many rows were in the original query (and therefore how many columns you'll need in the output), then it will require Dynamic SQL , which can be complicated.
Unfortunately, when you do search for "pivot", mlost of the hits will be things like "Search for pivot and you'll get lots of examples".
Re: Help for a query to add columns is one that actually has some information. It was a question very much like yours.
kindly tell me if there is any posting guidelines (except "Plain Text Help" on the right side) in this forum. i tried a lot to post above two o/p and query in easily readable format, but couldn't do that.Type these 6 characters:
(small letters only, inside curly brackets) before and after formatted text, to preserve spacing.