PostgreSQL Data Types - TIMESTAMP

Versions: PostgreSQL 8.x and 7.x

PostgreSQL - TIMESTAMP
Syntax	TIMESTAMP[(p)] [WITH\|WITHOUT TIMEZONE]
Data	Date and time data (year, month, day, hours, minutes, seconds and microseconds)
Parameters	p is the number of digits in the fractional part of second, 0 ⇐ p ⇐ 6; WITH TIME ZONE specifies that the time zone is stored along with the time values
Default	p is 6
Range	January 01, 4713 BC 12:00:00.000000 AM to December 31, 5874897 11:59:59.999999 PM
Special Values	The special values (strings in single quotes) are supported: 'epoch' (1970-01-01 00:00:00 - Unix system time zero), 'now' (current transaction's start time), 'today' (midnight today), 'yesterday' (midnight yesterday) and 'tomorrow' (midnight tomorrow)
Storage Size	8 bytes
Standards	ANSI SQL

PostgreSQL TIMESTAMP - Equivalents in Other Databases

Database	Data Type and Conversion
Oracle	TIMESTAMP(p), January 1, 4712 BC 00:00:00.000000000 to December 31, 9999 23:59:59.999999999 (nanoseconds accuracy)
SQL Server	DATETIME, January 01, 1753 00:00:00.000 to December 31, 9999 23:59:59.997 with accuracy 1/300 second DATETIME2 and DATETIMEOFFSET, January 01, 0001 00:00:00.0000000 to December 31, 9999 23:59:59.9999999 (100 nanoseconds accuracy) SMALLDATETIME, January 01, 1900 00:00 to June 06, 2079 11:59 (minute accuracy)
MySQL	DATETIME, January 01, 1000 00:00:00 to December 31, 9999 23:59:59 (seconds accuracy)
Sybase ASE	DATETIME, January 01, 1753 12:00:00.000 AM to December 31, 9999 11:59:59.999 PM (with accuracy 1/300 second) SMALLDATETIME, January 01, 1900 00:00 to June 06, 2079 11:59 (minute accuracy)
Informix	DATETIME, January 01, 0001 12:00:00.00000 AM to December 31, 9999 11:59:59.99999 PM (with 10 microseconds)
Teradata	TIMESTAMP(p), January 01, 0001 00:00:00.000 to December 31, 9999 23:59:61.999999 (microseconds accuracy)
HP Neoview	TIMESTAMP(p), January 01, 0001 00:00:00.000000 to December 31, 9999 23:59:59.999999 (microseconds accuracy)
Ingres	TIMESTAMP(p), 0001-01-01 00:00:00 to 9999-12-31 24:00:00

Related Data Types in PostgreSQL

Data Types
Datetime	DATE	TIME(p)
Intervals	INTERVAL(p)

Oracle

SQL Server

IBM DB2

MySQL

PostgreSQL

Sybase ASE

Sybase ASA

Informix DS

Teradata

HP Neoview

Interbase/Firebird

HiRDB

Ingres