TSQL Merge - Multiple statements after THEN

Question

I'm using a MERGE statement to merge two tables.
When I have a match in keys, but the data is different I want to inactivate the old/existing record with an update statement where I fill the EndDate column with GetDate() and the Active active with false.... (No problem)
But I also want to insert a new record with the same key, new data, fill startdate with GetDate() and Active with true.
Is that possible?
--something like....
WHEN MATCHED AND NOT (
MySource.Hash = MyTarget.Hash
THEN
-- inactivate old record
UPDATE
SET MyTarget.Active = 0
, MyTarget.DateEnd = GetDate()
-- insert new version of record
INSERT (column1, column2, DateStart, Active)
VALUES (MySource.column1, MySource.column2, GetDate(), 1)
WHEN NOT MATCHED BY TARGET
THEN
-- etc. etc.
 

Answer 1

My old merge statement looks like:
MERGE HistoricalStaging.dbo.AddressType as MyTarget
USING (
SELECT AddressTypeID
, Name
, rowguid
, ModifiedDate
, HASHBYTES('MD5', Name + '|' + CAST(rowguid as varchar(60)) + '|' + CAST(ModifiedDate as varchar(24))) as Hash
FROM Staging.dbo.AddressType
) as MySource
ON MyTarget.AddressTypeID = MySource.AddressTypeID
-- WHEN FOUND IN SOURCE AND DESTINATION THEN UPDATE
-- BUT ONLY WHEN HASH IS DIFFERENT
WHEN MATCHED AND NOT (
MySource.Hash = ISNULL(MyTarget.Hash, '')
THEN
/* Need to change this part */
UPDATE
Set MyTarget.Name = MySource.Name
, MyTarget.rowguid = MySource.rowguid
, MyTarget.ModifiedDate = MySource.ModifiedDate
, MyTarget.Hash = MySource.Hash
, MyTarget.DateEnd = Null
, MyTarget.Active = 1
-- WHEN FOUND IN SOURCE, BUT NOT IN DESTINATION THEN INSERT
WHEN NOT MATCHED BY TARGET
THEN
INSERT (AddressTypeID, Name, rowguid, ModifiedDate, Hash, Active, DateFrom)
VALUES (MySource.AddressTypeID, MySource.Name, MySource.rowguid, MySource.ModifiedDate, MySource.Hash, 1, GetDate())
-- WHEN FOUND IN DESTINATION, BUT NOT IN SOURCE THEN INACTIVATE
-- BUT ONLY WHEN DATEEND IS NOT NULL
WHEN NOT MATCHED BY SOURCE AND (
MyTarget.DateEnd is null
THEN -- INACTIVATE INSTEAD OF DELETE
UPDATE
Set MyTarget.Active = 0
, MyTarget.DateEnd = GetDate()
OUTPUT $action
But in the in this part
WHEN MATCHED AND NOT (
MySource.Hash = ISNULL(MyTarget.Hash, '')
there is now an update statement that replaces all changed values... But I want to 'close' that old record and insert the new version. (So an update and insert at the same time).