SERIAL no longer creates an index by default, as of 7.3.
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doc/FAQ
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doc/FAQ
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Frequently Asked Questions (FAQ) for PostgreSQL
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Last updated: Sat Nov 15 23:41:03 EST 2003
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Last updated: Wed Nov 19 11:50:04 EST 2003
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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4.15.1) How do I create a serial/auto-incrementing field?
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PostgreSQL supports a SERIAL data type. It auto-creates a sequence and
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index on the column. For example, this:
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PostgreSQL supports a SERIAL data type. It auto-creates a sequence.
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For example, this:
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CREATE TABLE person (
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id SERIAL,
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name TEXT
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id INT4 NOT NULL DEFAULT nextval('person_id_seq'),
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name TEXT
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);
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CREATE UNIQUE INDEX person_id_key ON person ( id );
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See the create_sequence manual page for more information about
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sequences. You can also use each row's OID field as a unique value.
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alink="#0000ff">
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
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<P>Last updated: Sat Nov 15 23:41:03 EST 2003</P>
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<P>Last updated: Wed Nov 19 11:50:04 EST 2003</P>
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<P>Current maintainer: Bruce Momjian (<A href=
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"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
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serial/auto-incrementing field?</H4>
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<P>PostgreSQL supports a <SMALL>SERIAL</SMALL> data type. It
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auto-creates a sequence and index on the column. For example,
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auto-creates a sequence. For example,
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this:</P>
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<PRE>
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CREATE TABLE person (
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id INT4 NOT NULL DEFAULT nextval('person_id_seq'),
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name TEXT
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);
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CREATE UNIQUE INDEX person_id_key ON person ( id );
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</PRE>
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See the <I>create_sequence</I> manual page for more information
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