ORA-01785

Question

Hi,
Can anyone help me with this error - ORA-01785: ORDER BY item must be the number of a SELECT-list expression
Both queries are running fine individually so i am quite confused.
select oh.client_id,
       oh.customer_id,
       oh.name,
       to_char(trunc(oh.ship_by_date), 'DD-Mon-YYYY'),
       ol.order_id,
       sum(itl.update_qty) as cases_shipped,
       count(distinct itl.pallet_id) as no_pallets     
from order_header oh, order_line ol, inventory_transaction itl
where oh.order_id = ol.order_id
and ol.line_id = itl.line_id
and itl.reference_id = ol.order_id
and itl.sku_id = ol.sku_id
and oh.client_id = ol.client_id
and itl.client_id = oh.client_id
and itl.code = 'Shipment'
and trunc(oh.ship_by_date) >= '16-FEB-10'
and trunc(oh.ship_by_date) <= '20-FEB-10'
and oh.client_id = 'NOM-TELFOR'
group by oh.client_id, oh.customer_id, oh.name, trunc(oh.ship_by_date), ol.order_id
UNION ALL
select oh.client_id,
       oh.customer_id,
       oh.name,
       to_char(trunc(oh.ship_by_date), 'DD-Mon-YYYY'),
       ol.order_id,
       sum(itl.update_qty) as cases_shipped,
       count(distinct itl.pallet_id) as no_pallets   
from order_header oh, order_line ol, inventory_transaction_archive itl
where oh.order_id = ol.order_id
and ol.line_id = itl.line_id
and itl.reference_id = ol.order_id
and itl.sku_id = ol.sku_id
and oh.client_id = ol.client_id
and itl.client_id = oh.client_id
and itl.code = 'Shipment'
and trunc(oh.ship_by_date) >= '16-FEB-10'
and trunc(oh.ship_by_date) <= '20-FEB-10'
and oh.client_id = 'NOM-TELFOR'
group by oh.client_id, oh.customer_id, oh.name, trunc(oh.ship_by_date), ol.order_id
order by trunc(oh.ship_by_date) asc, oh.client_id, oh.customer_idThanks in advance.
SM.

Answer 1

In a UNION you have to order on columns/expressions you're extractiong in the select list.
And you have to use either the column numbers or the column aliases.
Since you're trying to order on an expression that is not in the select list you need to do something like:
select client_id,
       customer_id,
       name,
       to_char(ship_by_date, 'DD-Mon-YYYY'),
       order_id,
       cases_shipped,
       no_pallets  
from (
select oh.client_id,
       oh.customer_id,
       oh.name,
       trunc(oh.ship_by_date) ship_by_date,
       ol.order_id,
       sum(itl.update_qty) as cases_shipped,
       count(distinct itl.pallet_id) as no_pallets     
from order_header oh, order_line ol, inventory_transaction itl
where oh.order_id = ol.order_id
and ol.line_id = itl.line_id
and itl.reference_id = ol.order_id
and itl.sku_id = ol.sku_id
and oh.client_id = ol.client_id
and itl.client_id = oh.client_id
and itl.code = 'Shipment'
and trunc(oh.ship_by_date) >= '16-FEB-10'
and trunc(oh.ship_by_date) <= '20-FEB-10'
and oh.client_id = 'NOM-TELFOR'
group by oh.client_id, oh.customer_id, oh.name, trunc(oh.ship_by_date), ol.order_id
UNION ALL
select oh.client_id,
       oh.customer_id,
       oh.name,
       trunc(oh.ship_by_date),
       ol.order_id,
       sum(itl.update_qty) as cases_shipped,
       count(distinct itl.pallet_id) as no_pallets   
from order_header oh, order_line ol, inventory_transaction_archive itl
where oh.order_id = ol.order_id
and ol.line_id = itl.line_id
and itl.reference_id = ol.order_id
and itl.sku_id = ol.sku_id
and oh.client_id = ol.client_id
and itl.client_id = oh.client_id
and itl.code = 'Shipment'
and trunc(oh.ship_by_date) >= '16-FEB-10'
and trunc(oh.ship_by_date) <= '20-FEB-10'
and oh.client_id = 'NOM-TELFOR'
group by oh.client_id, oh.customer_id, oh.name, trunc(oh.ship_by_date), ol.order_id
order by 4,1,2
)Max
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Edited by: Massimo Ruocchio on Mar 2, 2010 5:09 PM