SQL Server分区表，能否按照多个列作为分区函数的分区依据（转载）

问：

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Hi,

I have a table workcachedetail with 40 million rows which has 8 columns.We decided to partition the table.Most of the queries in our environment uses 4 columns in the where clause or joins.If I partition the table with 4 columns then I may get better performance.Can we partition the table on multiple columns(like partitioning on id,deptid,designation)?

Thanks,

答：

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no

You can partition by creating a persisted computed columns.

https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-table-computed-column-definition-transact-sql

意思就是，目前SQL Server还不支持将多个列作为分区函数的分区依据，只能用一列作为分区函数的分区依据，但是我们可以将多个列构造为一个计算列（computed columns）来作为分区依据。

参考文献：

how to partition a table on multiple columns