如何从数据库中取出第n条记录？用一句sql语句实现

假定你的表名为Table，你的标识列为Id

如果你的n是给定值，使用下列语句就可以：

rs.open

"select

top

1

*

from

(select

top

10

*

from

Table

order

by

Id

asc)

as

tmp

order

by

Id

desc",conn,3,3

如果你的n是变量，使用下列语句：

rs.open

"exec('select

top

1

*

from

(select

top

"

+

n

+

"

*

from

Table

order

by

Id

asc)

as

tmp

order

by

Id

desc'),conn,3,3

1. Oracle数据库

SELECT * FROM TABLENAME WHERE ROWNUM <= N

2. Infomix数据库

SELECT FIRST N * FROM TABLENAME

3. DB2数据库

SELECT *

FROM (SELECT * ROW_NUMBER() OVER({ORDER BY COL1 DESC}) AS ROWNUM FROM TABLENAME)

WHERE ROWNUM <= N

或者

SELECT COLUMN FROM TABLENAME FETCH FIRST N ROWS ONLY

4. SQL Server数据库

SELECT TOP N * FROM TABLENAME

5. Sybase数据库

SET ROWCOUNT N

GO

SELECT * FROM TABLENAME

6. MySQL数据库

SELECT * FROM TABLENAME LIMIT N

7. FoxPro数据库

SELECT * TOP N FROM TABLENAME ORDER BY COLUMN

以下示例从表 [tableName] 中读取符合查询条件的前10条记录的SQL语句

1.Access

select top (10) * from [tableName] where [query condition]

1.1 带order by的查询限制

Access中对select top的语句支持有限，如果要在查询top语句的后面使用order by，则order by排序字段必须是无重复值，如果有重复值的话，那么这个TOP很可能会失效，会返回所有记录。

解决办法：在order by 最后面加入主键id,如：

select top 10 from [tableName] order by 排序字段1,id

1.2 带子查询的示例

假如id是表[tableName]的主键，以下语句期望返回三条记录，但结果返回4条记录

select top 3 * from [tableName] where id in(是个子查询，结果比如为1,2,3,4)

解决办法

select top 3 * from [tableName] where id in(是个子查询，结果比如为1,2,3,4) order by id

2 DB2

select column from [tableName] where [query condition] fetch first 10 rows only

3 MySQL

select * from [tableName] where [query condition] limit 10

4 SQL Server

4.1 读取前10条

select top (10) * from [tableName] where [query condition]

4.2 读取后10条

select top (10) * from [tableName] order by id desc

4.3 按照某个排序，第5到10这几个记录

select top 6 * from [tableName] where id not in(select top 4 id from [tableName])

5 Oracle

select * from [tableName] where rownum<=10

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