On Sun, 2003-09-28 at 19:01, Muhyiddin A.M Hayat wrote:
>  
> hotel=# SELECT
> hotel-#   "public".billing.id,
> hotel-#   "public".billing.guest_id,
> hotel-#   "public".billing.trx_date,
> hotel-#   "public".billing.trx_time,
> hotel-#   "public".billing.payment_method,
> hotel-#   "public".billing.tax,
> hotel-#   "public".billing.dep_id,
> hotel-#   "public".department."name",
> hotel-#   SUM("public".items.price) AS total,
> hotel-#   "public".billing.amount_paid
> hotel-# FROM
> hotel-#   "public".billing_items
> hotel-#   INNER JOIN "public".billing ON
> ("public".billing_items.billing_id = "public".billing.id)
> hotel-#   INNER JOIN "public".department ON ("public".billing.dep_id =
> "public".department.id)
> hotel-#   INNER JOIN "public".items ON
> ("public".billing_items.items_id = "public".items.id)
> hotel-# GROUP BY  "public".billing.id;
> ERROR:  Attribute billing.guest_id must be GROUPed or used in an
> aggregate function
> hotel=#
>  
> What Worng ??

Any items in the select list need to be aggregated (e.g.
SUM("public".items.price)) or mentioned in the GROUP BY list.  Suppose
there are several billing.guest_id values for each billing.id; which
value should be listed in the output?  


-- 
Oliver Elphick                                [EMAIL PROTECTED]
Isle of Wight, UK                             http://www.lfix.co.uk/oliver
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     "Blessed is the man that endureth temptation; for when 
      he is tried, he shall receive the crown of life, which
      the Lord hath promised to them that love him."        
                                          James 1:12 


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