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timestamp to date and time column migration


  • From: Bill Totman <totman(at)gmail(dot)com>
  • To: pgsql-novice(at)postgresql(dot)org
  • Subject: timestamp to date and time column migration
  • Date: Sun, 29 Jul 2007 13:39:13 -0500
  • Message-id: <200707291339.30154.totman@gmail.com> <text/plain>

Hello all,

I created a table where I used a timestamp type column and after inserting 
about 300 entries into this table I would now rather have two separate 
columns for that data: one for just the date and the other for just the time.

I'm not sure what the best way would be to:
1) backup that information (from the current timestamp column), 
2) drop the timestamp table, 
3) add a date type table and a time type table, 
4) and ultimately import the already-space-separated timestamp data into these 
two columns.

Barring the above outline being erroneous, I suppose I just to know if there 
are any 'gotchas' that I should beware/know about before proceeding with this 
migration... as well as the syntax for piping data or running INSERT commands 
from a file on the commandline.


Thank you very, very much for any and all help you might have.

Bill Totman

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