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sql server 存储过程,问题补充里的这句什么意思?

CONSTRAINT [PK_CUST_FUND] PRIMARY KEY CLUSTERED ( [tx_date] ASC, [done_no] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY]
追问:什么叫primary文件组?WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON)是什么意思?谢谢啊..
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