Create Table On Primary

[sds814]

I was looking at the sql server 2008 create table BOL and I noticed the "On Primary" addition to the end of the create table query:

CREATE TABLE [dbo].[PurchaseOrderDetail]
(
    [PurchaseOrderID] [int] NOT NULL
        REFERENCES Purchasing.PurchaseOrderHeader(PurchaseOrderID),
    [LineNumber] [smallint] NOT NULL,
    [ProductID] [int] NULL 
        REFERENCES Production.Product(ProductID),
    [UnitPrice] [money] NULL,
    [OrderQty] [smallint] NULL,
    [ReceivedQty] [float] NULL,
    [RejectedQty] [float] NULL,
    [DueDate] [datetime] NULL,
    [rowguid] [uniqueidentifier] ROWGUIDCOL  NOT NULL
        CONSTRAINT [DF_PurchaseOrderDetail_rowguid] DEFAULT (newid()),
    [ModifiedDate] [datetime] NOT NULL 
        CONSTRAINT [DF_PurchaseOrderDetail_ModifiedDate] DEFAULT (getdate()),
    [LineTotal]  AS (([UnitPrice]*[OrderQty])),
    [StockedQty]  AS (([ReceivedQty]-[RejectedQty])),
CONSTRAINT [PK_PurchaseOrderDetail_PurchaseOrderID_LineNumber]
    PRIMARY KEY CLUSTERED ([PurchaseOrderID], [LineNumber])
    WITH (IGNORE_DUP_KEY = OFF)
) 
ON [PRIMARY];

Does that mean the table is created on the Primary Key? And if so how about if there is no primary key created on the table?

Thanks.

 

[mrdenny]

No, the "ON [PRIMARY]" part tells the SQL Server which file group the table will be created on. File Groups contain one or more physical files. You can create multiple file groups so that you can separate the tables onto different disks.

The primary key of the table is defined by the line which says "PRIMARY KEY CLUSTERED ([PurchaseOrderID], [LineNumber])".

Denny
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[sds814]

Thanks Denny!