PostgreSQL常用数据类型

一、数据类型

Name	Aliases	Description
bigint	int8	signed eight-byte integer
bigserial	serial8	autoincrementing eight-byte integer
bit [ (n) ]		fixed-length bit string
bit varying [ (n) ]	varbit	variable-length bit string
boolean	bool	logical Boolean (true/false)
Box	rectangular Box on a plane
bytea	binary data ("byte array")
character [ (n) ]	char [ (n) ]	fixed-length character string
character varying [ (n) ]	varchar [ (n) ]	variable-length character string
cidr	IPv4 or IPv6 network address
circle	circle on a plane
date	calendar date (year,month,day)
double precision	float8	double precision floating-point number (8 bytes)
inet	IPv4 or IPv6 host address
integer	int,int4	signed four-byte integer
interval [fields] [ (p) ]	time span
json	JSON data
line	infinite line on a plane
lseg	line segment on a plane
macaddr	MAC (Media Access Control) address
money	currency amount
numeric [ (p,s) ]	decimal [ (p,255); padding:0.5ex"> exact numeric of selectable precision
path	geometric path on a plane
point	geometric point on a plane
polygon	closed geometric path on a plane
real	float4	single precision floating-point number (4 bytes)
smallint	int2	signed two-byte integer
smallserial	serial2	autoincrementing two-byte integer
serial	serial4	autoincrementing four-byte integer
text	time [ (p) ] [ without time zone ]	time of day (no time zone)
time [ (p) ] with time zone	timetz	time of day,including time zone
timestamp [ (p) ] [ without time zone ]	date and time (no time zone)
timestamp [ (p) ] with time zone	timestamptz	date and time,255); padding:0.5ex"> tsquery	text search query
tsvector	text search document
txid_snapshot	user-level transaction ID snapshot
uuid	universally unique identifier
xml	XML data

一个表能包含的字段数目。 根据字段类型的不同，这个数目可能在250到1600之间