SQL Server 2005相對于SQL Server 2000改進(jìn)很大，有些還是非常實用的。

舉幾個例子來簡單說明 這些例子我引用了Northwind庫。

1. TOP 表達(dá)式 SQL Server 2000的TOP是個固定值，是不是覺得不爽，現(xiàn)在改進(jìn)了。

--前n名的訂單declare @n int; set @n = 10; select TOP(@n) * from Orders

2. 分頁 不知各位過去用SQL Server 2000是怎么分頁的，大多都用到了臨時表。SQL Server 2005一句話就支持分頁，性能據(jù)說也非常不錯。

--按Freight從小到大排序，求20到30行的結(jié)果; select * from(; select OrderId, Freight, ROW_NUMBER() OVER(order by Freight) as row from Orders; ) a; where row between 20 and 30

3. 排名

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

4. try ... catch SQL Server 2000沒有異常，T-SQL必須逐行檢查錯誤代碼，對于習(xí)慣了try catch程序員，2005是不是更加親切：

SET XACT_ABORT ON; -- 打開 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

5. 通用表達(dá)式CTE 通過表達(dá)式可免除你過去創(chuàng)建臨時表的麻煩。www.mypchelp.cn

--例子：結(jié)合通用表達(dá)式進(jìn)行分頁 WITH OrderFreight AS(; select OrderId, Freight, ROW_NUMBER() OVER(order by Freight) as row from Orders; ); select OrderId, Freight from OrderFreight where row between 10 and 20 特別，通過表達(dá)式還支持遞歸。

6. 直接發(fā)布Web Service 想要把store procedure變成Web Service就用這個吧，.NET, IIS都不需要，通過Windows 2003的HTTP Protocol Stack直接發(fā)布WebService,用這個功能需要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/'; ) Web Service就發(fā)布好了，敲入http://localhost/sql/orders?wsdl得到wsdl