Thread: create table

can anybody explain me the syntax of Create Table documentation??

CREATE [ TEMPORARY | TEMP ] TABLE table (
        column type
        [ NULL | NOT NULL ] [ UNIQUE ] [ DEFAULT value ]
        [ column_constraint_clause | PRIMARY KEY } [ ... ] ]
        [ , ... ]
        [ , PRIMARY  KEY ( column [, ... ] ) ]
        [ , CHECK (condition) ]
        [ , table_constraint_clause ]
        ) [ INHERITS ( inherited_table [, ... ] ) ]

i don't understand what the curly brace means after PRIMARY KEY (where is
the other matching brace? ). It must have something to do with the fact
that a 'column type' pair ( with options ) can occur more than once, but is
this syntax right?
i also don't understand what the [ ... ] and [, ... ] means. I do know that
brackets denote options and | alternatives.

tx

On Sun, Apr 29, 2001 at 09:32:15PM +0200, LeoDeBeo wrote:
> can anybody explain me the syntax of Create Table documentation??
>
> CREATE [ TEMPORARY | TEMP ] TABLE table (
>         column type
>         [ NULL | NOT NULL ] [ UNIQUE ] [ DEFAULT value ]
>         [ column_constraint_clause | PRIMARY KEY } [ ... ] ]
>         [ , ... ]
>         [ , PRIMARY  KEY ( column [, ... ] ) ]
>         [ , CHECK (condition) ]
>         [ , table_constraint_clause ]
>         ) [ INHERITS ( inherited_table [, ... ] ) ]
>
> i don't understand what the curly brace means after PRIMARY KEY (where is
> the other matching brace? ). It must have something to do with the fact

    Means that you can optionally have several others of the prior.

    PRIMARY KEY(column, column, column...)

> that a 'column type' pair ( with options ) can occur more than once, but is
> this syntax right?

    AFAICS yes.

    -Roberto

--
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  Roberto Mello - Computer Science, USU - http://www.brasileiro.net
       http://www.sdl.usu.edu - Space Dynamics Lab, Developer
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