I want to understand, when we do this for millions of records as insert, which is suggestable to to use whether SSIS OLEDB destination or SQLServer MERGE Command?

Thanks!

SELECT * from emp

selects all the fields of all the records from the table named ‘emp’

SELECT empno, ename from emp

selects the fields empno and ename of all the records from the table named ‘emp’

SELECT * from emp where empno < 100

selects all those records from the table named 'emp' where the value of the field empno is less than 100

SELECT * from article, author where article.authorId = author.authorId

selects all those records from the tables named 'article' and 'author' that have the same value of the field authorId

SQL INSERT Statement
This query is used to insert a record into a database table.

INSERT INTO emp(empno, ename) values(101, 'John Guttag')

inserts a record in to the emp table and set its empno field to 101 and its ename field to 'John Guttag'

SQL UPDATE Statement
This query is used to modify existing records in a database table.

UPDATE emp SET ename = 'Eric Gamma' WHERE empno = 101

updates the record whose empno field is 101 by setting its ename field to 'Eric Gamma'

SQL DELETE Statement
This query is used to delete existing record(s) from a database table.

DELETE FROM emp WHERE empno = 101

To bad i have to use this [word removed] at my work…. not very professional….

I hope a lot of companies will download just a free Db … that use this [word removed]…

I have used Merge statement for insert update in my stored procedure but I stuck upon one problem. How can I insert identity column in insert statement.

Here is my query for your reference:

MERGE [dbo].[tReserveData_4541] AS Target
USING (SELECT * FROM [dbo].[tblcangrowhitesh]) AS Source
ON ( [Source].[PK_ID] = [Target].[PK_ID])
WHEN MATCHED THEN
UPDATE SET [Target].[mgender] = Source.[mgender]
WHEN NOT MATCHED BY TARGET THEN
INSERT ([PK_ID],[Granularity],[ROWID],[mgender],[mma1],[mma2],[mma3],[mmadmincost],[mmcumulativevolume],[mmcurrency],[mmdate],[mmfileimporteddate],[mmfilename])
VALUES ([Source].[PK_ID],[Source].[Granularity],[Source].[ROWID],[Source].[mgender],[Source].[mma1],[Source].[mma2],[Source].[mma3],[Source].[mmadmincost],[Source].[mmcumulativevolume],[Source].[mmcurrency],[Source].[mmdate],[Source].[mmfileimporteddate],[Source].[mmfilename])

As you can see I am going to insert identity column [PK_ID] in merge-insert statement. But I am unable to do so.

Please guide me!

Thanks,
Hitesh

In one of our application, we do lot of delete and insert to avoid Update (in Transaction tables). This delete and insert happens in threads. If we use Merge, will it lock table and cause timeout? Please suggest

Thanks.

Is there a way to insert to the target with subqueries?

thx in advance

I want to know if it this is possible: data is written to table ’1′, I would like this to trigger an insert statement on table ’2′. Using the below statement I created a trigger that will update values in table ’2′ from table ’1′. But this only seems to work if the entries already exist in each table and I am updated data.

Create trigger [dbo].[updatename] on [dbo].[table1]
for update
as

IF update (name)
begin
declare @name varchar(20)
select @name = (select isnull(name,”)from inserted)
update TABLE2
set TABLE2.name = @name
from TABLE2, inserted
where TABLE2.ID = inserted.ID
end
GO

Thanks!

MERGE ThisDatabase.dbo.Student AS TargetTable
USING (SELECT StudentID, FirstName, LastName FROM LinkedServer.OtherDatabase.dbo.Student) AS SourceTable
ON TargetTable.StudentID = SourceTable.StudentID

Thanks for the lightbulb moment

MERGE table1 AS stm
USING table2 AS sd
ON ID1=ID2
WHEN MATCHED BY TARGET THEN
DELETE table1
DELETE table3
WHEN NOT MATCHED THEN
INSERT(table1_field1,table1_field2) –insert into table1
VALUES(11,12)
INSERT(table3_field1,table3_field2) –insert into table3
VALUES(31,32);