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select * from stu
select id,row_number() over (partition by snm order by id) from stu
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id snm
----------------
111 111V
111 111W
222 222N
333 3123
444 3123
555 3123
666 3232
777 3232
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id
------------
111 1
111 1
222 1
333 1
444 2
555 3
666 1
777 2
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How is MSSQL using memory?
http://www.sqlhacks.com/Administration/Memory-Usage
Memory is one the most important factor affecting MSSQL performance.
As an administrator, you should be monitoring the memory
regularly. When Microsoft SQL Server runs out of memory, it will use
virtual memory: ie: ......