Merge the common rows in SQL - sql

Question

I am getting the following output
Code Manager Employee
1 A Emp1
1 A Emp2
1 A Emp3
2 B Emp4
2 B Emp5
but I want result as
Code Manager Employee
1 A Emp1
Emp2
Emp3
2 B Emp4
Emp5
Code and manager columns should not repeat.It should be blank.

Answer 1

select case when Code = lag(Code) over(order by Code, Manager, Employee)
then null
else Code
end as Code,
case when Manager = lag(Manager) over(order by Code, Manager, Employee)
then null
else Manager
end as Manager,
Employee
from YourTable Y
order by Y.Code, Y.Manager, Y.Employee
Try on SQL Fiddle

Answer 2

You need something like Access or Crystal Reports to do this sort of formatting. Its not possible in plain SQL.

Answer 3

That is not possible by SQL. You should manually loop the data in code after receiving it from database.
Edit
After comments by Vashh and Lieven, I realized that it is possible. So if he needs for display purpose he can either use Func (suggested by Vaassh), Join with null (s. by Lieven) or may be loop and add to datagridview or table or whatever he wants to use.

Answer 4

For the fun of it, following is one way to do it but in the end, this is better done in the end-user application
;WITH YourTable (Code, Manager, Employee) AS(
SELECT * FROM (VALUES
(1, 'A', 'Emp1')
, (1, 'A', 'Emp2')
, (1, 'A', 'Emp3')
, (2, 'B', 'Emp4')
, (2, 'B', 'Emp5')
) a (b, c, d)
)
, q AS (
SELECT rn = ROW_NUMBER() OVER (ORDER BY Code, Manager, Employee), *
FROM YourTable
)
SELECT Code = CASE WHEN q1.Code = q2.Code THEN NULL ELSE q1.Code END
, Manager = CASE WHEN q1.Code = q2.Code THEN NULL ELSE q1.Manager END
, q1.Employee
FROM q q1
LEFT OUTER JOIN q q2 ON q1.rn = q2.rn + 1

Answer 5

I know you're asking for an answer in Oracle, but maybe this SQL Server example will help you (if you really, really need to do it like this and not in a reporting environment):
DECLARE #TBL TABLE(
Code INT,
Manager CHAR(1),
Employee VARCHAR(4))
INSERT #TBL VALUES (1,'A','Emp1')
INSERT #TBL VALUES (1,'A','Emp2')
INSERT #TBL VALUES (1,'A','Emp3')
INSERT #TBL VALUES (2,'B','Emp4')
INSERT #TBL VALUES (2,'B','Emp5')
;WITH cte
AS (SELECT Code
,Manager
,Employee
,ROW_NUMBER() OVER(ORDER BY Code) rownum
FROM #TBL)
SELECT CASE curr.Code
WHEN prev.Code THEN ''
ELSE CAST(curr.Code AS VARCHAR(20))
END AS _Code
,CASE curr.Manager
WHEN prev.Manager THEN ''
ELSE curr.Manager
END AS _Manager
,curr.Employee
FROM cte curr
LEFT JOIN cte prev
ON curr.rownum = prev.rownum + 1

Answer 6

If you're just using SQL Server 2005/2008, you can achieve this with the following.
declare #table table (
Code int,
Manager Varchar(1),
Employee varchar(10)
)
insert into #table values
(1,'A','Emp1'),
(1,'A','Emp2'),
(1,'A','Emp3'),
(2,'A','Emp4'),
(2,'A','Emp5')
select * from #table
select
case when number=1 then Code else null end as Code,
case when number=1 then Manager else null end as Manager,
employee
from (
select *,
row_number() over (partition by code, manager order by code,manager) as number
from #table
) x
Which will give you:
(5 row(s) affected)
Code Manager Employee
----------- ------- ----------
1 A Emp1
1 A Emp2
1 A Emp3
2 A Emp4
2 A Emp5
(5 row(s) affected)
Code Manager employee
----------- ------- ----------
1 A Emp1
NULL NULL Emp2
NULL NULL Emp3
2 A Emp4
NULL NULL Emp5
(5 row(s) affected)

Answer 7

Done:)
You can change NULL values to '' if you want to.
WITH
CTE1 AS (
SELECT DISTINCT [Code], [Manager],
( SELECT TOP 1 Employee
FROM [dbo].[table] t2
WHERE t1.Code = t2.Code AND t1.Manager = t2.Manager
ORDER BY Employee) AS [Employee]
FROM [dbo].[table] t1)
,
CTE2 AS (
SELECT * FROM [dbo].[table]
EXCEPT
SELECT * FROM CTE1)
SELECT * FROM CTE1
UNION
SELECT NULL as Code, NULL as Manager, Employee
FROM CTE2
ORDER BY Employee

Answer 8

My SQL*Plus is a little rusty but if that's the tool that you're using then it should be fairly simple but using the BREAK command.
As mentioned in one of the comments about, this is best left to your reporting tool rather than doing in the actual SQL because an individual row without all the values doesn't make any sense outside the context of the result set.
BREAK on code on manager
SELECT code, manager, employee
FROM yourTable y
order by code, manager;
Please not that my SQL*Plus is a little rusty so this might not work exactly but details of the BREAK command can be found in the Oracle documentation.