优化SQLServer——表和分区索引(二)

–******************
–1.创建分区函数
–******************

–Create the partition function: dailyPF
DECLARE @StartDay DATE=DATEADD(dd,-3,CAST(SYSDATETIME() AS DATE));
CREATE PARTITION FUNCTION DailyPF (DATETIME2(0))
    AS RANGE RIGHT FOR VALUES
    (@StartDay, DATEADD(dd,1,@StartDay), DATEADD(dd,2,@StartDay), 
        DATEADD(dd,3,@StartDay), DATEADD(dd,4,@StartDay) );
GO

–******************
–2. 创建文件组

–******************

ALTER DATABASE PartitionThis ADD FILEGROUP DailyFG1
GO
ALTER DATABASE PartitionThis ADD FILEGROUP DailyFG2
GO
ALTER DATABASE PartitionThis ADD FILEGROUP DailyFG3
GO
ALTER DATABASE PartitionThis ADD FILEGROUP DailyFG4
GO
ALTER DATABASE PartitionThis ADD FILEGROUP DailyFG5
GO
ALTER DATABASE PartitionThis ADD FILEGROUP DailyFG6
GO

–******************
–3. 创建分区架构
–******************

—
CREATE PARTITION SCHEME DailyPS
    AS PARTITION DailyPF
    TO (DailyFG1, DailyFG2, DailyFG3, DailyFG4, DailyFG5, DailyFG6);

–******************
–4. 在分区架构上建表
–******************

if OBJECT_ID(‘OrdersDaily’,’U’) is null
CREATE TABLE OrdersDaily (
    OrderDate DATETIME2(0) NOT NULL,
    OrderId int IDENTITY NOT NULL,
    OrderName nvarchar(256) NOT NULL
) on DailyPS(OrderDate)
GO

–*******************************
–创建架构
–*******************************

–Create a schema for “partition helper” objects
CREATE SCHEMA [ph] AUTHORIZATION dbo;
GO

–插入测试数据
INSERT OrdersDaily(OrderDate, OrderName)
SELECT DATEADD(ss, t.N, DATEADD(dd,-3,CAST(CAST(SYSDATETIME() AS DATE) AS DATETIME2(0)))) AS OrderDate,
    CASE WHEN t.N % 3 = 0 THEN ‘Robot’ WHEN t.N % 4 = 0 THEN ‘Badger’  ELSE ‘Pen’ END AS OrderName
FROM ph.tally AS t–tally是一个1到10万自增长的表，只有一个字段 N

WHERE N < = 1000;
   

INSERT OrdersDaily(OrderDate, OrderName)
SELECT DATEADD(ss, t.N, DATEADD(dd,-2,CAST(CAST(SYSDATETIME() AS DATE) AS DATETIME2(0)))) AS OrderDate,
    CASE WHEN t.N % 3 = 0 THEN ‘Flying Monkey’ WHEN t.N % 4 = 0 THEN ‘Junebug’  ELSE ‘Pen’ END AS OrderName
FROM ph.tally AS t
WHERE N < = 2000;

INSERT OrdersDaily(OrderDate, OrderName)
SELECT DATEADD(ss, t.N, DATEADD(dd,-1,CAST(CAST(SYSDATETIME() AS DATE) AS DATETIME2(0)))) AS OrderDate,
    CASE WHEN t.N % 2 = 0 THEN ‘Turtle’ WHEN t.N % 5 = 0 THEN ‘Eraser’  ELSE ‘Pen’ END AS OrderName
FROM ph.tally AS t
WHERE N < = 3000;

INSERT OrdersDaily(OrderDate, OrderName)
SELECT DATEADD(ss, t.N, CAST(CAST(SYSDATETIME() AS DATE) AS DATETIME2(0))) AS OrderDate,
    CASE WHEN t.N % 3 = 0 THEN ‘Lasso’ WHEN t.N % 2 = 0 THEN ‘Cattle Prod’  ELSE ‘Pen’ END AS OrderName
FROM ph.tally AS t
WHERE N < = 4000;
GO

随即在创建相关的索引

–******************
–7. 创建索引
–******************
–添加聚集索引
ALTER TABLE OrdersDaily
ADD CONSTRAINT PKOrdersDaily
    PRIMARY KEY CLUSTERED(OrderDate,OrderId)
GO

–对齐索引
—
CREATE NONCLUSTERED INDEX NCOrderIdOrdersDaily
    ON OrdersDaily(OrderId)
GO

–非对齐索引
CREATE NONCLUSTERED INDEX NCOrderNameOrdersDailyNonAligned
    ON OrdersDaily(OrderName) ON [PRIMARY]
GO

SELECT  SCHEMA_NAME(so.schema_id) AS schema_name ,
        OBJECT_NAME(p.object_id) AS object_name ,
        p.partition_number ,
        p.data_compression_desc ,
        dbps.row_count ,
        dbps.reserved_page_count * 8 / 1024. AS reserved_mb ,
        si.index_id ,
        CASE WHEN si.index_id = 0 THEN ‘(heap!)’
                ELSE si.name
        END AS index_name ,
        si.is_unique ,
        si.data_space_id ,
        mappedto.name AS mapped_to_name ,
        mappedto.type_desc AS mapped_to_type_desc ,
        partitionds.name AS partition_filegroup ,
        pf.name AS pf_name ,
        pf.type_desc AS pf_type_desc ,
        pf.fanout AS pf_fanout ,
        pf.boundary_value_on_right ,
        ps.name AS partition_scheme_name ,
        rv.value AS range_value
FROM    sys.partitions p
JOIN    sys.objects so
        ON p.object_id = so.object_id
            AND so.is_ms_shipped = 0
LEFT JOIN sys.dm_db_partition_stats AS dbps
        ON p.object_id = dbps.object_id
            AND p.partition_id = dbps.partition_id
JOIN    sys.indexes si
        ON p.object_id = si.object_id
            AND p.index_id = si.index_id
LEFT JOIN sys.data_spaces mappedto
        ON si.data_space_id = mappedto.data_space_id
LEFT JOIN sys.destination_data_spaces dds
        ON si.data_space_id = dds.partition_scheme_id
            AND p.partition_number = dds.destination_id
LEFT JOIN sys.data_spaces partitionds
        ON dds.data_space_id = partitionds.data_space_id
LEFT JOIN sys.partition_schemes AS ps
        ON dds.partition_scheme_id = ps.data_space_id
LEFT JOIN sys.partition_functions AS pf
        ON ps.function_id = pf.function_id
LEFT JOIN sys.partition_range_values AS rv
        ON pf.function_id = rv.function_id
            AND dds.destination_id = CASE pf.boundary_value_on_right
                                        WHEN 0 THEN rv.boundary_id
                                        ELSE rv.boundary_id + 1
                                    END