Check duplicates when inserting

hi all,
I am confuse now,Let me explain the process.
In database table called "Individual " it's store all customer information
user can insert in this table by .NET application but we have another process
that can insert individual from file.
Sometimes same individual repeat again so before i insert into Individual
table i have to check that it's exist or not but there is not any unique ID
for each customer so basically one customer in individual table have
Indentity generated IndividualID so when i try to insert there is no way to
find out that is this same customer or diffrent.
Indivivual table have another column like
FirstName
LastName
BirthDay
BirthMonth
BirthYear
Gender
Maritial Status
Street
StreetName
AddressLine1
City
PostalCode
So how can i find that this is duplicate or not.
I can actually match this column value with inserting individual value but
you know coustomer can registered with little diffrent with names or address
like ("daniel" can register with second time with "dan")
So is there is any trick to compare this duplicates.
Thanks in advance
So
Hi
Itzik Ben-Gan has written a greate example
CREATE TABLE #Demo (
idNo int identity(1,1),
colA int,
colB int
)
INSERT INTO #Demo(colA,colB) VALUES (1,6)
INSERT INTO #Demo(colA,colB) VALUES (1,6)
INSERT INTO #Demo(colA,colB) VALUES (2,4)
INSERT INTO #Demo(colA,colB) VALUES (3,3)
INSERT INTO #Demo(colA,colB) VALUES (4,2)
INSERT INTO #Demo(colA,colB) VALUES (3,3)
INSERT INTO #Demo(colA,colB) VALUES (5,1)
INSERT INTO #Demo(colA,colB) VALUES (8,1)
PRINT 'Table'
SELECT * FROM #Demo
PRINT 'Duplicates in Table'
SELECT * FROM #Demo
WHERE idNo IN
(SELECT B.idNo
FROM #Demo A JOIN #Demo B
ON A.idNo <> B.idNo
AND A.colA = B.colA
AND A.colB = B.colB)
PRINT 'Duplicates to Delete'
SELECT * FROM #Demo
WHERE idNo IN
(SELECT B.idNo
FROM #Demo A JOIN #Demo B
ON A.idNo < B.idNo -- < this time, not <>
AND A.colA = B.colA
AND A.colB = B.colB)
DELETE FROM #Demo
WHERE idNo IN
(SELECT B.idNo
FROM #Demo A JOIN #Demo B
ON A.idNo < B.idNo -- < this time, not <>
AND A.colA = B.colA
AND A.colB = B.colB)
PRINT 'Cleaned-up Table'
SELECT * FROM #Demo
DROP TABLE #Demo
"Yomesh" <Yomesh@.discussions.microsoft.com> wrote in message
news:740A33F5-59AF-465A-A543-E724A49951C1@.microsoft.com...
> hi all,
> I am confuse now,Let me explain the process.
> In database table called "Individual " it's store all customer information
> user can insert in this table by .NET application but we have another
process
> that can insert individual from file.
> Sometimes same individual repeat again so before i insert into Individual
> table i have to check that it's exist or not but there is not any unique
ID
> for each customer so basically one customer in individual table have
> Indentity generated IndividualID so when i try to insert there is no way
to
> find out that is this same customer or diffrent.
> Indivivual table have another column like
> FirstName
> LastName
> BirthDay
> BirthMonth
> BirthYear
> Gender
> Maritial Status
> Street
> StreetName
> AddressLine1
> City
> PostalCode
> So how can i find that this is duplicate or not.
> I can actually match this column value with inserting individual value but
> you know coustomer can registered with little diffrent with names or
address
> like ("daniel" can register with second time with "dan")
> So is there is any trick to compare this duplicates.
> Thanks in advance
>
> So
|||Thx for your reply.
But i want to check existing record with inserting record by columns of that
individual table to find out this is unique record or same
"Uri Dimant" wrote:

> Hi
> Itzik Ben-Gan has written a greate example
> CREATE TABLE #Demo (
> idNo int identity(1,1),
> colA int,
> colB int
> )
> INSERT INTO #Demo(colA,colB) VALUES (1,6)
> INSERT INTO #Demo(colA,colB) VALUES (1,6)
> INSERT INTO #Demo(colA,colB) VALUES (2,4)
> INSERT INTO #Demo(colA,colB) VALUES (3,3)
> INSERT INTO #Demo(colA,colB) VALUES (4,2)
> INSERT INTO #Demo(colA,colB) VALUES (3,3)
> INSERT INTO #Demo(colA,colB) VALUES (5,1)
> INSERT INTO #Demo(colA,colB) VALUES (8,1)
> PRINT 'Table'
> SELECT * FROM #Demo
> PRINT 'Duplicates in Table'
> SELECT * FROM #Demo
> WHERE idNo IN
> (SELECT B.idNo
> FROM #Demo A JOIN #Demo B
> ON A.idNo <> B.idNo
> AND A.colA = B.colA
> AND A.colB = B.colB)
> PRINT 'Duplicates to Delete'
> SELECT * FROM #Demo
> WHERE idNo IN
> (SELECT B.idNo
> FROM #Demo A JOIN #Demo B
> ON A.idNo < B.idNo -- < this time, not <>
> AND A.colA = B.colA
> AND A.colB = B.colB)
> DELETE FROM #Demo
> WHERE idNo IN
> (SELECT B.idNo
> FROM #Demo A JOIN #Demo B
> ON A.idNo < B.idNo -- < this time, not <>
> AND A.colA = B.colA
> AND A.colB = B.colB)
> PRINT 'Cleaned-up Table'
> SELECT * FROM #Demo
> DROP TABLE #Demo
> "Yomesh" <Yomesh@.discussions.microsoft.com> wrote in message
> news:740A33F5-59AF-465A-A543-E724A49951C1@.microsoft.com...
> process
> ID
> to
> address
>
>
|||Thx for your reply.
But i want to check existing record with inserting record by columns of that
individual table to find out this is unique record or same
"Uri Dimant" wrote:

> Hi
> Itzik Ben-Gan has written a greate example
> CREATE TABLE #Demo (
> idNo int identity(1,1),
> colA int,
> colB int
> )
> INSERT INTO #Demo(colA,colB) VALUES (1,6)
> INSERT INTO #Demo(colA,colB) VALUES (1,6)
> INSERT INTO #Demo(colA,colB) VALUES (2,4)
> INSERT INTO #Demo(colA,colB) VALUES (3,3)
> INSERT INTO #Demo(colA,colB) VALUES (4,2)
> INSERT INTO #Demo(colA,colB) VALUES (3,3)
> INSERT INTO #Demo(colA,colB) VALUES (5,1)
> INSERT INTO #Demo(colA,colB) VALUES (8,1)
> PRINT 'Table'
> SELECT * FROM #Demo
> PRINT 'Duplicates in Table'
> SELECT * FROM #Demo
> WHERE idNo IN
> (SELECT B.idNo
> FROM #Demo A JOIN #Demo B
> ON A.idNo <> B.idNo
> AND A.colA = B.colA
> AND A.colB = B.colB)
> PRINT 'Duplicates to Delete'
> SELECT * FROM #Demo
> WHERE idNo IN
> (SELECT B.idNo
> FROM #Demo A JOIN #Demo B
> ON A.idNo < B.idNo -- < this time, not <>
> AND A.colA = B.colA
> AND A.colB = B.colB)
> DELETE FROM #Demo
> WHERE idNo IN
> (SELECT B.idNo
> FROM #Demo A JOIN #Demo B
> ON A.idNo < B.idNo -- < this time, not <>
> AND A.colA = B.colA
> AND A.colB = B.colB)
> PRINT 'Cleaned-up Table'
> SELECT * FROM #Demo
> DROP TABLE #Demo
> "Yomesh" <Yomesh@.discussions.microsoft.com> wrote in message
> news:740A33F5-59AF-465A-A543-E724A49951C1@.microsoft.com...
> process
> ID
> to
> address
>
>
|||Hi Yomesh
I think i understood your problem, for this you can write an INSTEAD of
trigger:
Here is the sample Code:
==============
CREATE TRIGGER <TRIGGER>
on <TABLE> instead of insert
as
begin
declare
@.cnt integer
@.fname
@.lname...
SELECT @.cnt = count(*)
FROM <TABLE>,INSERTED
WHERE <TABEL>.FirstName = INSERTED.FirstName AND
<TABEL>.LastName = INSERTED.LastName
IF ISNULL(@.cnt,0) = 0
begin
select @.fname=FirstName, @.LName = LastName...
FROM INSERTER
insert into <TABLE> values (@.FName,@.LName,.....)
end
end
go
==============
The Syntax might not be correct, but this gives an idea how to go about.
I dont have SQL installed on my system to give u the exact system. If u
still have any problems please get back to me and I will try to address
thanks and regards
Chandra
"yomesh" wrote:
[vbcol=seagreen]
> Thx for your reply.
> But i want to check existing record with inserting record by columns of that
> individual table to find out this is unique record or same
> "Uri Dimant" wrote: