Assign a Primary Key in Query

[Guest]

Hi all,
What is the proper SQL to create a primary key within a query? I thought it
was the following.
CREATE UNIQUE INDEX Primary Key ON [Invoices]!(invoice_num) WITH PRIMARY
DISALLOW NULL

In the above case, [Invoices] is the table name and (invoice_num) is the
field that I am making primary.

Any help is appreciated.
Thanks
Rob Meiner

 

[Guest]

Have a look at www.sqlcourse.com/intro.html

 

[MGFoster]

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In JET SQL:

CREATE INDEX PK_Invoices ON Invoices (invoice_num) WITH PRIMARY

Since you've declared "WITH PRIMARY" you don't have to indicate the
index is "UNIQUE" since all primary keys are unique by default, and, you
don't have indicate "DISALLOW NULL" since Primary keys are NOT NULL by
default.

In ANSI 92 SQL:

ALTER TABLE Invoices ADD CONSTRAINT PK_Invoices
PRIMARY KEY (invoice_num)

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MGFoster:::mgf00 <at> earthlink <decimal-point> net
Oakland, CA (USA)

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