Question

我需要在网页上编写寻呼机的代码，通常使用mysql，它是SELECT with LIMIT 60, 20的简单解决方案，这意味着从60个位置选择20行。

现在我正在使用SQL Server，但应该解决这个问题 - 我知道TOP语法不合适，我也听说过SQL Server中的ROW_NUMBER()函数，但是我的例子d发现不够清楚 - 请帮助测试表像“汽车”一样简单地

select * from cars limit 20, 10

Answer 1

ROW_NUMBER（）不能在你的where子句中，所以你必须使用单独的select：

select *
from (select row_number() over (ORDER BY cars.CarId) as Row, *
    from cars
    ) temp
where Row between 20 and 29

Answer 2

SQL Server 2005引入了新的ROW_NUMBER（）函数，使分页任务更容易。要实现与前面示例中的分页，请从Customers表中获取第三页，其中Country列为'Spain'，每页有10条记录，并按CompanyName存储过程排序如下：

CREATE PROCEDURE Paging_Customers
(
  @SelectedPage int,
  @PageSize int
)
AS
BEGIN
  WITH CTE_Customers(PageNumber, ContactTitle, ContactName, CompanyName, Phone, Country)
  AS
  (
  SELECT CEILING((ROW_NUMBER() OVER
  (ORDER BY CompanyName ASC
  AS PageNumber, ContactTitle, ContactName, CompanyName, Phone, Country
  FROM Customers
  )

SELECT *
FROM CTE_Customers WHERE PageNumber = @SelectedPage
END

然后，我们用这个简单的行来调用这个过程（第三页和每行十行）：

EXEC Paging_Customers 3, 10

Answer 3

-- Sample data
;with cars(Name) as
(
  select 'SAAB' union all
  select 'Volvo' union all
  select 'Opel' union all
  select 'Ford'
)  

-- Query using row_number
select *
from 
  (
   select *,
          row_number() over(order by Name) as rn
   from cars
  ) as C
where C.rn between 2 and 3

结果：

Name  rn
----  --
Opel  2
SAAB  3

Answer 4

试试这个：

SELECT * FROM 
    (SELECT *, ROW_NUMBER() OVER (ORDER BY col1) AS row FROM sys.databases) table1 
WHERE row > 20 and row <= 30

提供了更多答案here on SO。

mysql限制x，y等效于SQL Server l？

4 个答案: