Re: create table
От | Martín Marqués |
---|---|
Тема | Re: create table |
Дата | |
Msg-id | 01050419170205.07818@bugs обсуждение исходный текст |
Ответ на | create table (LeoDeBeo <leodebeo@hotmail.com>) |
Список | pgsql-sql |
On Dom 29 Abr 2001 22:34, 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 > 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. My docs (7.1) look like this: CREATE [ TEMPORARY | TEMP ] TABLE table_name ( { column_name type [ column_constraint [ ... ] ] | table_constraint} [, ... ] ) [ INHERITS ( inherited_table [, ... ] ) ] where column_constraint can be: [ CONSTRAINT constraint_name ] { NOT NULL | NULL | UNIQUE | PRIMARY KEY | DEFAULT value | CHECK (condition) | REFERENCES table [ ( column ) ] [ MATCH FULL| MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED |INITIALLY IMMEDIATE ] } and table_constraint can be: [ CONSTRAINT constraint_name ] { UNIQUE ( column_name [, ... ] ) | PRIMARY KEY ( column_name [, ... ] ) | CHECK ( condition ) | FOREIGN KEY ( column_name[, ... ] ) REFERENCES table [ ( column [, ... ] ) ] [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLYDEFERRED | INITIALLY IMMEDIATE ] } Looks clear to me. :-) -- El mejor sistema operativo es aquel que te da de comer. Cuida tu dieta. ----------------------------------------------------------------- Martin Marques | mmarques@unl.edu.ar Programador, Administrador | Centro de Telematica Universidad Nacional del Litoral -----------------------------------------------------------------
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