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convert interval info into days


Running PostgreSQL 7.2.1 on RedHat Linux 7.2.

How can I convert data in a table that has been created
with the INTERVAL data type into a numeric format?

Say, I have a table with this type of data:

-1 years | 00:00
00:00 | 1 year 90 days
00:00 | 1 year 90 days
00:00 | 1 year 90 days
00:00 | 1 year 90 days
00:00 | 1 year 90 days
00:00 | 1 year 90 days
1 year | 2 years
42 days | 2 years
42 days | 2 years
-1 years | 00:00
-1 years | 00:00
-1 years | 00:00
42 days | 2 years
1 year | 2 years

I want to convert all of this into days, but
I don't think I can use 'to_char' because
I get things like this:

[snip example]
test_db=> select to_char('2 years 3 mons 17 days'::interval, 'YY MM DD');
02 03 17

test_db=> select to_char('2 years'::interval)/365;
ERROR: Function 'to_char(interval)' does not exist
Unable to identify a function that satisfies the given argument
You may need to add explicit typecasts
[/snip example]

Any suggestions?



Nov 11 '05 #1
0 3917

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