昨天做了個日常大數據歸檔，歸檔700W數據，表字段130左右，字段比較多，分享下！
---- 先禁用表的index
1.先獲取需要禁用的索引
declare @tname varchar(100)
set @tname='orders'
select 'alter index '+' '+c.indexname+' '+'on'+' '+@tname+' '+'disable'
from
(
select * from
(
SELECT
OBJECT_NAME(i.OBJECT_ID) AS TableName,
i.name AS IndexName,
i.index_id AS IndexID,
8 * SUM(a.used_pages)/1024 AS 'Indexsize(MB)'
FROM sys.indexes AS i
JOIN sys.partitions AS p ON p.OBJECT_ID = i.OBJECT_ID AND p.index_id = i.index_id
JOIN sys.allocation_units AS a ON a.container_id = p.partition_id
GROUP BY i.OBJECT_ID,i.index_id,i.name
)a
where a.tablename=@tname
--order by [Indexsize(MB)] desc
)c
go
--2.禁止上面語句 獲得索引，但是主鍵和clustered index別禁用，切記！
----刪除數據
DBCC DROPCLEANBUFFERS
DBCC FREEPROCCACHE
go
SET NOCOUNT ON
BEGIN TRANSACTION
while 1=1
begin
delete top(20000) from dbo.orders with(TABLOCK)
where ordertime <'2010-1-1'
if @@rowcount<20000
break
end
commit
go
----索 引重建
alter index all on orders rebuild
go
基本上很短時間搞定，為了性能，需 要完成索引rebuild和統計信息更新！
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