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→Mapping Data Types, Metadata
: BLOBs [http://www.postgresql.org/files/documentation/books/aw_pgsql/node96.html]
: Serial - Auto_Increment - Sequence
:: A sequence is a special kind of database object designed for generating unique numeric identifiers. It is typically used to generate artificial primary keys. Sequences are similar, but not identical, to the AUTO_INCREMENT concept in MySQL. Sequences are most commonly used via the serial pseudotype.[http://neilconway.org/docs/sequences/]
===Functions===
