Delete Duplicates And Resolve Foreign Key References using merge?
If possible for set multiple source tables or target tables?please send examples..

MERGE table1 AS m
USING (SELECT ServiceAreaCode,PhoneNumbers,Preferences,Opstype,PhoneType FROM table2) AS m1
ON m1.PhoneNumbers = m.PhoneNumbers
WHEN MATCHED AND m.Opstype = ‘”a”‘ THEN DELETE;

but it give errore
Msg 547, Level 16, State 0, Line 1
The MERGE statement conflicted with the REFERENCE constraint “FK__manoj2__PhoneNum__1273C1CD”. The conflict occurred in database “test”, table “dbo.manoj1″, column ‘PhoneNumbers’.
The statement has been terminated.

Please Help me

Msg 8672, Level 16, State 1, Procedure R_verificationData_BatchJobs, Line 5
The MERGE statement attempted to UPDATE or DELETE the same row more than once. This happens when a target row matches more than one source row. A MERGE statement cannot UPDATE/DELETE the same row of the target table multiple times. Refine the ON clause to ensure a target row matches at most one source row, or use the GROUP BY clause to group the source rows.

I have 2 tables which has only one column and contains mobile numbers. I want to combine both the tables and want to make 1 table and want to remove duplicate entries after that. Pls suggest the easiest way to perform the same.I am using SSMS 2008 version.

Regards,
Amit.

merge targettable t
using (select s1.col1, s2.col2 from source1 s1 join source2 s2
on s1.col3 = s2.col3 ) sourcetable s3
when matched
then update set t.col1 = s3.col1,
t.col2 = s3.col2 ;

instead above query if write like

merge targettable t
using
source1 s1
join source2 s2
on s1.col3 = s2.col3
when matched
then update set t.col1 = s1.col1,
t.col2 = s2.col2 ;

Interesting article. Here you are ‘the hero’…

But I expose the next situation; I need merge some tables (for example table1 and table2) for two databases (BD1 as central and BD2 as extension) that have references between them, table1 is referenced for table2. If execute merge for table1, the data that exists in the table2 of BD2, in the reference value, not will be the same value after the merge. ¿how I do to merge the data in table2, if the reference value in table1 has changed and, I need do the insert with this value in the merge for table 2?

Example.
Table1: Customer
IDCustomer = 1,
NameCustome = JOHN.

Table2: CustomerPhone
IDCustomerPhone = 1,
IdCustomer = 1,
NumberPhone = 1234567890

IDCustomerPhone = 2,
IdCustomer = 1,
NumberPhone = 0987654321

For example the IDCustomer has change in the merge to 5, and this value is necesary for the merge in the table2. ¿How I do for make this, without problems?

Thanks in advance,

Thanks a lot for such a nice article.