I am modifying the structure of a database. The content of several columns of the table FinancialInstitution has to be transferred into the table Person. FinancialInstitution is linked to Person with a foreign key. Each FinancialInstitution needs the Id of its corresponding Person. So, for each new line inserted in Person, the id of this new line (IDENTITY) has to be copied back into the corresponding line of FinancialInstitution.
The obvious way of doing this is an iterative T-SQL code. But I'm interested in knowing if it's possible to do it only with set-based operations.
I imagined the inner-level of such a request would be something like:
INSERT INTO Person (Street1, Number1, City1, State1, PostCode1, CountryId1, WorkDirectPhone1, Fax1, Email1)
OUTPUT inserted.Id, FinancialInstitution.Id
SELECT Id, Street, Number, City, [State], PostCode, CountryId, PhoneNumber, Fax, Email
FROM FinancialInstitution;
Unfortunately, it seems OUTPUT can't correlate that way…
Best Answer
I guess you could (ab)use
MERGE
for this. First create a (temporary) table:Then
MERGE
intoPerson
(instead ofINSERT
), so you can use columns of the tables involved in theOUTPUT
clause:Then use the temp table to
UPDATE FinancialInstitution
:Test at: SQL-Fiddle