Sql Server 分页查询
最近在写SQL Server 的分页查询,数据库里的test表就只有id 和name两个字段。如图:
![Image 1][]
想法很简单,假如要选择3到4两条记录,那么先选择前4条记录,再将其倒排,再选择前两条,再将其正排,就是最终结果。
有一点,SQL 语句是先进行order by 再选择top n。
SELECT *
FROM
( SELECT TOP 2 *
FROM
(
SELECT TOP 2 *
FROM test
ORDER BY ID ASC
)
f ORDER BY id DESC)
s ORDER BY s.ID
/*分析重点*/
SELECT *
FROM
( SELECT TOP 2 *
FROM
(
SELECT TOP 4 *
FROM test
ORDER BY ID ASC
)
f ORDER BY id DESC)
s ORDER BY s.ID
/*
先选择前4个正序,然后让其倒序,再选择前2条,这时是倒序的,还要再正序
*/
SELECT *
FROM
( SELECT TOP 2 *
FROM
(
SELECT TOP 6 *
FROM test
ORDER BY ID ASC
)
f ORDER BY id DESC)
s ORDER BY s.ID
SELECT *
FROM
( SELECT TOP 6 *
FROM
(
SELECT TOP 6 *
FROM test
ORDER BY ID ASC
)
f ORDER BY id DESC)
s ORDER BY s.ID
[Image 1]:
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