I use SQL Server 2014.
In my procedure, I have a MERGE statement and I have a question about it.
My MERGE statement has simple following structure:
MERGE dbo.T1 AS tgt
USING (SELECT ...) AS src ON ...
WHEN MATCHED THEN
UPDATE ...
WHEN NOT MATCHED THEN
INSERT ...
OUTPUT inserted.MyColumn
INTO #NewTable (MyColumnValue);
Just like how it populates a table for all inserts, I also need it to populate another table for all updates too.
Is is possible, and if yes then would you please let me know how?
No, it's not possible to direct the results to two tables. See this question.
You can make the table wider and output both the inserted and deleted columns on the same row:
MERGE dbo.T1 AS tgt
USING (SELECT ...) AS src ON ...
WHEN MATCHED THEN
UPDATE ...
WHEN NOT MATCHED THEN
INSERT ...
OUTPUT $action, inserted.col1, inserted.col2, deleted.col1, deleted.col2
INTO #NewTable (action, inserted_col1, inserted_col2, deleted_col1, deleted_col2);
Then you can split #NewTable however you want.
Related
I have two identically-shaped tables: an "active" table, and an "archive" table. As part of a recurring process, I want to move rows from the active to the archive, and I'd like to do it using MERGE so that my process doesn't fail with a Violation of PRIMARY KEY constraint '...'. Cannot insert duplicate key....
I had thought to do it like so:
MERGE INTO Archive
USING (DELETE FROM Active OUTPUT DELETED.* WHERE Active.Id IN (...)) AS Active
ON (Active.Id = Archive.Id)
WHEN NOT MATCHED THEN
INSERT (Id, ...)
VALUES (Active.Id, ...);
but then learned that A nested INSERT, UPDATE, DELETE, or MERGE statement is not allowed in the USING clause of a MERGE statement.
The only other thing that occurs to me is to use a temp table:
SELECT TOP 0 * INTO #temp FROM Active
DELETE FROM Active
OUTPUT DELETED.* INTO #temp
WHERE Id IN (...)
MERGE INTO Archive
USING #temp AS Active
ON (Active.Id = Archive.Id)
WHEN NOT MATCHED THEN
INSERT (Id, ...)
VALUES (Active.Id, ...);
and it works, but it feels... unsatisfying.
Is there a more concise or direct way to achieve this "safe row movement"?
This may be a simple query to some of you. But I am not strong in Sql, so expecting some solution for my problem.
I have 2 tables, ProductVenueImport and SupplierVenueImport.
We are dumping all the records from SupplierVenueImport to ProductVenueImport using MERGE clause and a Temp table. Temp will have valid records from SupplerVenuImport and from Temp table we are importing records to ProductVenueImport.
But before importing data to ProductVenueImport from Temp table I need to check for the duplicate records in my target (ProductVenueImport).
For example if I am importing a record with name as 'A', I need to look into ProductVenueImport whether 'A' already existing or not. If it is not existing then only I need to insert 'A' otherwise not.
Could somebody tell me how to do this?
Is using Cursors only the option?
Thanks,
Naresh
Assuming the Temp table itself doesn't have duplicates, you could use MERGE like this:
Insert non-existing products.
Do a NO-OP in case of an existing product.
Use $action in the OUTPUT clause to mark which rows were considered for insertion (and inserted) and which for update (but not really updated).
This is what I mean:
DECLARE #noop int; -- needed for the NO-OP below
MERGE INTO ProductVenueImport AS tgt
USING Temp AS src
ON src.ProductID = tgt.ProdutID
WHEN NOT MATCHED THEN
INSERT ( column1, column2, ...)
VALUES (src.column1, src.column2, ...)
WHEN MATCHED THEN
UPDATE SET #noop = #noop -- the NO-OP instead of update
OUTPUT $action, src.column1, src.column2, ...
INTO anotherTempTable
;
I think this would do this :
INSERT INTO PRODUCTTBL(FEILD1, FIELD2, FIELD3, FIELD4, FIELD5)
SELECT (FIELD1,FIELD2,FIELD3,FIELD4,FIELD5) FROM TEMP WHERE CRITERIAFIELD NOT IN(SELECT DISTINCT CRITERIAFIELD FROM PRODUCTTBL)
This should allow you to check for duplicates in a table
select columnname from tablename
group by columnname
having count(columnname) >1
sorry if I am not getting the question right, can't you use the merge statement on the source table with "When not matched Insert" to insert the new records alone
so in your case it should be like this
merge into ProductVenueImport using temp on (<condition for duplicate>)
when not matched then insert <clause>;
the merge clause will make sure that no duplicate records are inserted into your source table.
I’ve been tasked to synchronize 2 tables (both are identical). They have 60 columns each. Table A is the primary table that will be initially filled. I need to create a stored procedure (done) that will merge these 2 tables and populate both with the same exact data (Update, insert, delete) when called. How would I use the MERGE function in SQL to achieve this? I’ve looked at both the MSDN documentation and similar that’s on technet, but I’m pretty confused on getting started. Do I need to specify each field I need merged? Or is it a simple call I’m missing that will perform this action?
Here is a link to a simple example of the MERGE statement:
http://www.simple-talk.com/sql/learn-sql-server/the-merge-statement-in-sql-server-2008/
The basic syntax reads as:
MERGE table1
USING table2
ON table1.id = table2.id
WHEN MATCHED THEN
--Do an update here
WHEN NOT MATCHED BY TARGET THEN
--Do an insert here (or a delete)
;
You can also use WHEN NOT MATCHED BY SOURCE
Over 60 columns is a great number! When I need to sync 2 identical table I do:
;WITH tbl_to_synch as (
-- Prepare table to update,
Select *,chk = CHECKSUM(*) from [dbo].[tableA]
)
MERGE tbl_to_synch as [Target]
USING (Select *,chk = CHECKSUM(*) from [dbo].[tableB]) as [source]
ON [Target].key = [source].key
WHEN MATCHED AND [Target].chk <> [source].chk THEN
-- UPDATE ONLY row that is changed
UPDATE
SET
column01 = [source].[column01]
,column02 = [source].[column01]
-- ....
,column59 = [source].[column59]
,column60 = [source].[column59]
WHEN NOT MATCHED BY TARGET THEN
insert (column01, column02, ...,column59,column60)
values (column01, column02, ...,column59,column60)
WHEN NOT MATCHED BY SOURCE THEN DELETE
-- Show what is changed
OUTPUT $action, ISNULL(INSERTED.key,DELETED.key);
I have a Scenario where i need to User Merge SQL statement to Synchronize two Tables. Let's suppose i have two tables Table A and Table B. Schema is same with the exception of one Extra Column in Table A. That Extra column is a flag that tells me which records are ready to be inserted/updated in Table B. Lets say that flag column is IsReady. It will be either true or False.
Can i use Isready=True in Merge Statement or I need a Temp table to move all records from Table A to Temp Table where IsReady=True and then use Merge SQL on TempTable and Table B???
Yes, you can use that column in the merge condition.
merge tableB targetTable
using tableA sourceTable
on sourceTable.IsReady = 1 and [any other condition]
when not matched then
insert ...
when matched and [...] then
update ...
This may help you,
merge into tableB
using tableA
on tableB.IsReady=true
when not matched then
insert (tableB.field1,tableB.field2..)
values (tableA.field1,tableA.field2..);
commit;
I need to insert the data in a csv file in to a temporary table and insert some data for the corresponding id value in another table. I have created and inserted the data in to the csv file. For all the records in the csv file how can I loop through and insert dome data for the corresponding record in the other table.
CREATE TABLE #tbcompanies
(ID INT)
GO
BULK
INSERT #tbcompanies
FROM 'd:\ids.csv'
WITH
(
ROWTERMINATOR = '\n'
)
select * from #tbcompanies
drop table #tbcompanies
Assuming both tables have an ID column, you could update the other table like:
update ot
set col1 = tmp.col1
. col2 = tmp.col2
from #tbcompanies tmp
join OtherTable ot
on ot.ID = tmp.ID
If in addition to updating, you'd like to insert rows that do not exist, consider the merge statement:
; merge OtherTable as target
using #tmpcompanies as source
on target.id = source.id
when not matched by target then
insert (id, col1, col2) values (source.id, source.col1, source.col2)
when matched then
update set col1 = source.col1, col2 = source.col2;
You don't need to loop through anything, since you use SQL Server 2008 and this version supports the MERGE statement.
Have a look here.
Or simply use update with a from clause and join the two tables.
If it's upsert functionality you need, I strongly recommend the Merge function.
pseudo code
merge TargetTableName target
using #tbcompanies tmp on tmp.idfield=target.idfield
when matched then update......
when not matched then insert...........