使用sql如何讀取數據庫中從某個位置到某個位置的數據？不連續時主要采用row_number()函數。
方法一:
select row_num,* from
(
select *, row_number() over (order by I_VoucherMaterialID) as row_num from dbo.I_VoucherMaterial
) tt
where row_num between 30 and 40
注釋：row_number()函數必須要接一個over對它排序。
方法二：
WITH OrderedOrders AS
(
SELECT SalesOrderID, OrderDate,
ROW_NUMBER() OVER (order by OrderDate)as RowNumber
FROM Sales.SalesOrderHeader
)
SELECT *
FROM OrderedOrders
WHERE RowNumber between 30 and 40;
注釋：指定臨時命名的結果集，這些結果集稱為公用表表達式 (CTE)。該表達式源自簡單查詢，並且在 SELECT、INSERT、UPDATE 或 DELETE 語句的執行范圍內定義。該子句也可用在 CREATE VIEW 語句中，作為該語句的 SELECT 定義語句的一部分。公用表表達式可以包括對自身的引用。這種表達式稱為遞歸公用表表達式。
格式：with Cust as
(
select * from Employee
)
select * from Cust
方法三:
select * from
(select top 40 * from I_VoucherMaterial order by I_VoucherMaterialID) a
where I_VoucherMaterialID not in
(select top 30 I_VoucherMaterialID from I_VoucherMaterial order by I_VoucherMaterialID)
