Postgresql的Dates and Times

Date – Date only (2012-04-25)
Time – Time only (13:00:00.00)
Timestamp – Date and Time (2012-04-25 13:00:00.00)
Time with Timezone – Time only (13:00:00.00 PST)
Timestamp with Timezone (2012-04-25 13:00:00.00 PST)
Interval – A span of time (4 days)

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