How Do I Achieve Following Output

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Dear Team,

I have a table....Unit Master(IN SQL 2005)
Unit_id Unit Link_id
1 Kg 2
2 gm 3
3 mg 0
4 DZN 5
5 Pcs 0

in output i need all the rows come in the output if they have link in any way parent to child or child to parent through a single query...is there any way to achieve in a single query ?

Output if pass in a proc parameter 1/2/3
Unit_id Unit Link_id
1 Kg 2
2 gm 3
3 mg 0

Output if pass in a proc parameter 4/5

Unit_id Unit Link_id
4 DZN 5
5 Pcs 0

Thanks
Sukhen Dass

Posted 3-Apr-14 20:04pm

sukhen dass

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Maciej Los · Answer 1 · 2014-04-03T20:07:00

Solution 1

Try:

SQL

SELECT Unitid, UnitLink
FROM UnitMaster
WHERE Unitid IN (1,2,3)

More: IN (t-sql)[^]

Posted 3-Apr-14 20:07pm

Maciej Los

Comments

sukhen dass 4-Apr-14 2:18am

i will pass only one input mean i will pass single unit_id(For.exe USP_GET_LINK_UNITS(1) or USP_GET_LINK_UNITS(2) or USP_GET_LINK_UNITS(3)).. but it should return all link rows either child to parent or parent to child...thanks

Maciej Los 4-Apr-14 2:29am

There is no relationship between data suach as parent to child and child to parent.

King Fisher · Answer 2 · 2014-04-03T20:22:00

SQL

create table parents(unit_id bigint identity(1,1),unit nvarchar(max),link_id bigint)
insert into parents values('kg',2)
insert into parents values('gm',3)
insert into parents values('mg',0)
insert into parents values('DZN',5)
insert into parents values('pcs',0)

just pass the parent_id :

SQL

with cte (link_id,unit_id,unit)
as
(
select link_id,unit_id,unit from parents where unit_id=1
union all
select b.link_id,b.unit_id,b.unit from cte as a inner join  parents  as b on a.link_id=b.unit_id
)
select unit_id,link_id,unit From cte

SQL

with cte (link_id,unit_id,unit)
as
(
select link_id,unit_id,unit from parents where unit_id=4
union all
select b.link_id,b.unit_id,b.unit from cte as a inner join  parents  as b on a.link_id=b.unit_id
)
select unit_id,link_id,unit From cte

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