SQL Grouping sorting paging (big God help to write the worship of a bit)

Query all:

SELECT p3.id, P3. Name, P3. Addtime
From (SELECT Name, MAX (addtime) as Maxaddtime
From Product as P1
GROUP by Name) as P2
INNER JOIN Product as P3 on P2. Name = P3. Name
ORDER by P2. Maxaddtime DESC, P3. Addtime desc, p3.id desc

Pagination of the front and back top method (5 rows per page, 5th page, i.e. 第21-25 rows of data)
(1) Take the first 25 lines in the order required, (2) Top 5 lines, (3) reverse the order back

SELECT p5.id, P5. Name, P5. Maxaddtime
From
(SELECT TOP 5 p4.*
From
(SELECT TOP p3.id, P3. Name, P3. Addtime, P2. Maxaddtime
From
(SELECT Name, MAX (addtime) as Maxaddtime
From Product as P1
GROUP by Name) as P2
INNER JOIN Product as P3 on P2. Name = P3. Name
ORDER by P2. Maxaddtime DESC, P3. Addtime desc, p3.id desc) as P4
ORDER by P4. Maxaddtime, P4. Addtime, p4.id) as P5
ORDER by P5. Maxaddtime DESC, P5. Addtime desc, p5.id desc

Row_number method (for SQL Server 2005 or more)
(5 rows per page, check the 5th page, that is, 第21-25 rows of data)

SELECT p4.id, P4. Name, P4. Addtime
From
(SELECT p3.id, P3. Name, P3. Addtime, Row_number () over (ORDER by P2. Maxaddtime DESC, P3. Addtime desc, p3.id desc) as RN
From
(SELECT Name, MAX (addtime) as Maxaddtime
From Product as P1
GROUP by Name) as P2
INNER JOIN Product as P3 on P2. Name = P3. Name) as P4
WHERE P4. RN between and 25

SQL Group Sorting paging (the big God helps to write the worship of a bit)