SQL Server ->> 生成时间类型的Partition Function和Partition Scheme代码

有时工作中要建个分区函数，可是像日期这种分区函数要是搞个几百个的值那不是要搞死我。于是写了点代码自动生成一个从1990年开始的按月的分区函数和对应的分区主题

USE [TestDB]
GO

DECLARE @STR NVARCHAR(MAX)
SET @STR = ‘CREATE PARTITION FUNCTION [PF_RangeByMonth_FromYear1990](DATETIME) AS
            RANGE LEFT FOR VALUES (‘

DECLARE @STR2 NVARCHAR(MAX)
SET @STR2 = ‘CREATE PARTITION SCHEME [PS_RangeByMonth_FromYear1990] AS PARTITION [PF_RangeByMonth_FromYear1990] TO (‘

--generate corresponding partition function script
SELECT @STR + STUFF((SELECT ‘‘‘,‘‘‘ + CONVERT(VARCHAR, DATEADD(MONTH,ID-1,‘1990-01-01‘), 121)
        FROM [dbo].[Numbers]
        WHERE ID <= DATEDIFF(MONTH,‘1990-01-01‘,‘2040-01-01‘)+1
        ORDER BY [ID]
        FOR XML PATH(‘‘), TYPE).value(‘.‘, ‘varchar(max)‘)
,1,2,‘‘) + ‘‘‘)‘ + CHAR(13) as ‘partition function script‘

--generate corresponding partition scheme script
SELECT @STR2 + STUFF((SELECT +‘, [PRIMARY]‘
        FROM [dbo].[Numbers]
        WHERE ID <= DATEDIFF(MONTH,‘1990-01-01‘,‘2040-01-01‘)+2
        FOR XML PATH(‘‘), TYPE).value(‘.‘, ‘varchar(max)‘)
,1,2,‘‘) + ‘)‘ + CHAR(13) as ‘partition scheme script‘