multiple inserts in one query or procedure

into multiple rows with one common criteria.

USE YourDB
GO
INSERT INTO MyTable (FirstCol, SecondCol)
SELECT 'First' ,1
UNION ALL
SELECT 'Second' ,2
UNION ALL
SELECT 'Third' ,3
UNION ALL
SELECT 'Fourth' ,4
UNION ALL
SELECT 'Fifth' ,5
GO

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or

 INSERT INTO [t]
        (
          [camp1],
          [camp2],
          [camp3]
        )
 VALUES ( 1, 2, 3 ),
        ( 3, 4, 5 ),
        ( 6, 7, 8 ),
        ( 9, 10, 11 ),
        ( 12, 13, 14 )

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Does...
     INSERT INTO TableName (Column1, Column2) VALUES (Value1, Value2) WHERE Criteria=Value
...not work?

values to be inserted are read from an xml file, so i don't know how many set of values there going to be.
do i need dynamic sql query or is it possible to do this in stored procedure?

I think you'd have to build the query dynamically.  You might be able to do this with a stored proc, but I'm not sure.

read this

http://blog.sqlauthority.com/2009/02/13/sql-server-simple-example-of-reading-xml-file-using-t-sql/

and use the

INSERT INTO TableX
select  field1,field2
FROM OPENXML ('Your parameters' )

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Nice.  Didn't know about that...

>>values to be inserted are read from an xml file, so i don't know how many set of values there going to be. <<
Instead of hypotheicals, why don't you post the schema (CREATE TABLE) to your table, a sample Xml file and how they are mapped (if it is not obvious) and we can give you a complete example using either OPENXML() if you are still using SQL Server 2000 compatibility or the newer Xml Data Type Methods if you are using SQL Server 2005 or greater.

none