ask syntax sql to get length of field

From: Mariya Yuniarti <mariya_yuniarti(at)yahoo(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: ask syntax sql to get length of field
Date: 2006-04-20 07:37:08
Message-ID: 20060420073708.83452.qmail@web33514.mail.mud.yahoo.com
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Here Question :

I have table A with structure :

Number Character(20),
Description Character(50)

I want to get length of field Number (20)

What is syntax sql to get length of field ?

thx


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