How does operation with data types time???

From: Pablo Saul Salazar - CESERCOMP <ssalazar(at)goliat(dot)espol(dot)edu(dot)ec>
To: pgsql-interfaces(at)postgreSQL(dot)org
Subject: How does operation with data types time???
Date: 1999-06-30 03:33:48
Message-ID: Pine.GSO.3.96.990630082752.21070A-100000@goliat.espol.edu.ec
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Hello

I have another question, please should someone help me??

my question is :
How may does operation in fields of type "time"??
for example , i want does the following query:

lab=>update ctrl set curren_time = current_time - 3;

is tell o want subtract three minutes to values in field current_time that
is of tipe time,

Is posible this???

Please help me

Pablo Salazar Loaiza
Asistente de Redes
CESERCOMP-ESPOL

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