From: devil live <definite_ocean@hotmail.com>
To: pgsql-sql@postgresql.org
Subject: Conditional SQL Query
Date: Thu, 11 Jan 2007 21:34:50 +0000
Message-ID: <BAY20-F159C48AE0E201B150535BFEEB10@phx.gbl> (raw)
I want to write sql statement about product, product_tree_special,
product_tree_template
product has
product_code varchar(20) PRIMARY KEY,
product_name varchar(20)
product_tree_template has
product_code varchar(20) PK,
stock_code_to_make_product(20) PK,
amout float4
product_tree_spcial has
production_no serial,
product_code varchar(20) PK,
stock_code_to_make_product(20) PK,
amout float4
NOW : product_tree_template table is the default table for production
ingredients of the PRODUCT
but sometimes my customer using special product_tree table for some
production_no
how can I write a query to get right ingredients of a product basis on
production_no field
such as;
first check production_no if product_tree_special table if not found then
look at template table...
What are your suggestions?
PS: I do not wanna write PL functions for this...
Thanks
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To: pgsql-sql@postgresql.org
Cc: definite_ocean@hotmail.com
Subject: Re: Conditional SQL Query
In-Reply-To: <BAY20-F159C48AE0E201B150535BFEEB10@phx.gbl>
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