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t1g312
Posting Yak Master
United Arab Emirates
148 Posts |
 Posted - 03/01/2006 : 01:02:35
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Hi all,
I would like to update a parent table field with a sum obtained from the child table but SQL server gives the error "An aggregate may not appear in the set list of an UPDATE statement". How else can I acheive the same result?
Thanks in advance,
Adi
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khtan
In (Som, Ni, Yak)
Singapore
16746 Posts |
Posted - 03/01/2006 : 01:06:40
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post your update statement
----------------------------------
'KH'
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shallu1_gupta
Constraint Violating Yak Guru
India
394 Posts |
Posted - 03/01/2006 : 01:15:33
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try this..
update tableparent set column = a.sumcolumn
from
(
select sum(column) as sumcolumn from tablechild
) a |
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t1g312
Posting Yak Master
United Arab Emirates
148 Posts |
Posted - 03/01/2006 : 01:16:23
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update table1 set table1.Quantity = sum(table2.quantity) from table1 inner join table2 on table1.ID = table2.table1ID
group by table2.ID
quote:
Originally posted by khtan
post your update statement
----------------------------------
'KH'
Adi
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khtan
In (Som, Ni, Yak)
Singapore
16746 Posts |
Posted - 03/01/2006 : 01:25:00
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update t1
set t1.Quantity = t2.sum_qty
from table1 t1 inner join
(
select ID, sum(Quantity) as sum_qty
from table2
group by ID
) as t2
on t1.ID = t2.ID
OR
update t1
set t1.Quantity = (select sum(Quantity) from table2 t2 where t2.ID = t1.ID)
from table1 t1
----------------------------------
'KH'
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t1g312
Posting Yak Master
United Arab Emirates
148 Posts |
Posted - 03/01/2006 : 01:26:11
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quote:
Originally posted by shallu1_gupta
try this..
update tableparent set column = a.sumcolumn
from
(
select sum(column) as sumcolumn from tablechild
) a
Brilliant! Thanks man!
Adi
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madhivanan
Premature Yak Congratulator
India
22461 Posts |
Posted - 03/01/2006 : 03:15:36
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Note that sum of all the rows of child table will be updated to parent table. If you want to update with corresponding primary key values, then use khtan's methods
Madhivanan
Failing to plan is Planning to fail |
Edited by - madhivanan on 03/01/2006 03:16:49 |
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t1g312
Posting Yak Master
United Arab Emirates
148 Posts |
Posted - 03/01/2006 : 05:42:37
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quote:
Originally posted by madhivanan
Note that sum of all the rows of child table will be updated to parent table. If you want to update with corresponding primary key values, then use khtan's methods
Madhivanan
Failing to plan is Planning to fail
I already did that. Thanks again guys!
Adi
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nakhan82
Starting Member
Netherlands
1 Posts |
Posted - 04/19/2010 : 07:29:46
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ohh wow, thanks, this was so helpfull, I always had to make a new table to 'sum'the columns, but this is much faster!
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mikey2nicey
Starting Member
United Kingdom
1 Posts |
Posted - 06/25/2010 : 06:41:52
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This was a great help to me too. Thanks!  |
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Topic |
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Update field with aggregate value?
