總結的一些sql server 2005 的新特征
2005 新特性
1.with 用法
with aa
as(select top 10 * from table)
select * from aa
2.ntile 用法
select field1 ,field2,ntile(8) over(order by field1 desc)
from table
--分8組,每組編號
3.PIVOT 用法
select vendor_id,'2005' as '2005','2005' as '2006' purchase_order
SELECT Vendor_ID, [164] AS Emp1, [198] AS Emp2, [223] AS Emp3, [231] AS Emp4, [233] AS Emp5
FROM
(SELECT no,currency_id, Vendor_ID
FROM purchase_order) p
PIVOT
(
COUNT (vendor_id)
FOR vendor IN
( [164], [198], [223], [231], [233] )
) AS pvt
ORDER BY VendorID
4.BEGIN TRY
{sql statement| SQL Block}
END TRY
BEGIN CATCH TRAN_ABORT
{sql statement| SQL Block}
END CATCH
5.大字段的應用
varchar(max)
nvarchar(max)
6.新增函數
row_number() 相當於行號
--分頁功能
with a as
(select top 100 *,row_number() over(order by field1) as a from table)
select * from a where a between 10 and 20
7.不支持*=,=*的左,右聯接