how to remove duplicate value

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how to remove duplicate value in sql using inner join or left outer join...

ex:

select e.name,e.description,t.mobile ,m.address from employee e left outer join dept t on e.id=t.id left outer join mail m on m.id1=e.id1

ans:

employee dept mail
********......*****....*****

id..id1.. name||id..descr||id1..address||

1.. 1 ... sek ||1...chenn||.1... kovil
2.. 2 ....ram ||2...ramm ||.2....stree

ans coming

sek..chenn..kovil
sek..rammm..stree
ram..chenn.kovil
ram..rammm.stree

i dont want duplicate value

Posted 20-May-15 0:03am

sekar305

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Frankie-C · Answer 1 · 2015-05-20T00:12:00

Solution 1

Use Select-Distinct clause (see[^]).

Posted 20-May-15 0:12am

Frankie-C

Vinay Haravi · Answer 2 · 2015-05-20T02:30:00

Please check this code

SQL

DECLARE @Employee TABLE
(
  ID int, 
  ID1 int, 
  Name nvarchar(10)
)
INSERT INTO @Employee VALUES(1,1,'Sek')
INSERT INTO @Employee VALUES(2,2,'Ram')

DECLARE @Dept TABLE
(
  ID int, 
  [Description] nvarchar(10),
  Mobile int
)
INSERT INTO @Dept VALUES(1,'Chenn',1234567891)
INSERT INTO @Dept VALUES(2,'Ramm',1234567891)

DECLARE @Mail TABLE
(
  ID1 int, 
  [Address] nvarchar(10)
)
INSERT INTO @Mail VALUES(1,'kovil')
INSERT INTO @Mail VALUES(2,'stree')


Select e.Name,t.description,t.mobile ,m.address 
FROM @employee e 
	LEFT OUTER JOIN @Dept t on e.id=t.id 
	LEFT OUTER JOIN @Mail m on m.id1=e.id1