sqlserver 2005新功能

2005

ž   Top N

declare @n int
set @n=8
select top(@n) * from tablename

ž   分页

select * from(  
    select OrderId, Freight, ROW_NUMBER() OVER(order by Freight) as row from Orders  
) a  
where row between 20 and 30

ž   排名

select * from(  
    select OrderId, Freight, RANK() OVER(order by Freight) as rank from Orders  
) a  
where rank between 20 and 30

 

ž   try ... catch 

 

SET XACT_ABORT ON  -- 打开 try功能  
BEGIN TRY  
    begin tran  
        insert into Orders(CustomerId) values(-1)  
    commit tran  
    print 'commited'  
END TRY  
BEGIN CATCH  
    rollback     
    print 'rolled back'  
END CATCH

 

ž   公用表表达式

WITH ProductCTE([CategoryID], [ProductsCount])

AS

(

    SELECT [CategoryID],COUNT(1)

    FROM [dbo].[Product]

    GROUP BY [CategoryID]

)

 

SELECT c.[CategoryID],c.[CategoryName], cte.[ProductsCount]

FROM [dbo].[Category] c

INNER JOIN ProductCTE cte

    ON c.[CategoryID] = cte.[CategoryID]

ORDER BY cte.[ProductsCount]

--关联CTE

WITH CategoryCTE
AS
(
    SELECT * FROM [dbo].[Category]
),ProductCTE
AS
(
    SELECT p.*,cte.[CategoryName] FROM [dbo].[Product] p
    INNER JOIN CategoryCTE cte
        ON p.[CategoryID] = cte.[CategoryID]
)
 
SELECT * FROM ProductCTE
---------------------------------------------------------------------------递归CTE：递归公用表表达式是在CTE内的语句中调用其自身的CTE。

WITH cte([CategoryID],[CategoryName],[ParentID],[Level])
AS
(
    -- 查询语句
    SELECT [CategoryID],[CategoryName],[ParentID],1 AS [Level] FROM [dbo].[Category]
    WHERE [ParentID] IS NULL
    UNION ALL
    -- 递归语句
    SELECT c.[CategoryID],c.[CategoryName],c.[ParentID], cte.[Level] + 1
    FROM [dbo].[Category] c
    INNER JOIN cte
        ON c.[CategoryID] = cte.[ParentID]
)
 
SELECT [CategoryID],[CategoryName],[ParentID],[Level] FROM cte
 

限制递归层次、Where过滤递归结果数据层次

    参考：https://www.cnblogs.com/libingql/p/4461715.html

 一段展BOM的代码,以微软示例数据库AdventureWorks的 Production.BillOfMaterials表为例，在计算用量的时候，要用数据转换，否则会出现“定位点类型和递归部分的类型不匹配”的问题。

;with bom as
(
    select b.ProductAssemblyID,b.ComponentID,b.BOMLevel,b.PerAssemblyQty,cast(b.PerAssemblyQty as decimal(10,6)) qty,ROW_NUMBER() over(order by getdate()) od
        from Production.BillOfMaterials b where b.ComponentID=767
    union all
    select b.ProductAssemblyID,b.ComponentID,b.BOMLevel,b.PerAssemblyQty,cast(b.PerAssemblyQty*bom.qty as decimal(10,6)) ,ROW_NUMBER() over(order by getdate())+ bom.od*100
        from Production.BillOfMaterials b join bom on b.ProductAssemblyID=bom.ComponentID
)
select p.ProductNumber '物料编码',replicate('..',bom.bomlevel)+ p.Name '物料名称' ,bom.BOMLevel '层级',bom.PerAssemblyQty 'BOM用量',
    bom.qty '累计用量',bom.od '排序' from bom join Production.Product p on bom.ComponentID=p.ProductID
order by rtrim(od)

ž   直接发布Web Service

ž   想要把store procedure变成Web Service就用这个吧，.NET, IIS都不需要，通过Windows 2003的HTTP Protocol Stack直接发布WebService,用这个功能需要Windows 2003 sp1

   --DataSet CustOrdersOrders(string customerID)  
CREATE ENDPOINT Orders_Endpoint  
state=started  
as http(  
    path='/sql/orders',  
    AUTHENTICATION=(INTEGRATED),  
    ports=(clear)  
)  
for soap(  
    WebMethod 'CustOrdersOrders'(    
        name='Northwind.dbo.CustOrdersOrders'  
    ),  
     
    wsdl=default,  
    database='Northwind',  
    namespace='http://mysite.org/'  
)

ž   Web Service就发布好了，敲入http://localhost/sql/orders?wsdl得到wsdl

ž   在http通讯时，例子代码使用的是Windows集成验证 。
给个客户端例子。

private void button1_Click(object sender, EventArgs e)
{
    localhost.Orders_Endpoint endp = new localhost.Orders_Endpoint();
    endp.Credentials = System.Net.CredentialCache.DefaultCredentials;
    object[] r = endp.CustOrdersOrders("VINET");

    DataSet ds = new DataSet();
    foreach(object o in r)
        if (o is DataSet) ds = (DataSet)o;

    dataGridView1.DataSource = ds.Tables[0];            
}

SQL Server 2005支持basic, digest, sql auth等多种验证，你需要编写不同的验证代码。