update query

anyone who can give me a sample database using update query

i want to update all records using calculated field from another table a sum
of TableA.fieldA to my TableB.fieldB

It seems you are attempting to store a value that may change and can be
derived by a calculation. If so, this is generally considered poor practice.
However assuming in Northwind.mdb you want to total each customers Freight
from all Orders and store it in a new field (TotalFreight) in the Customers
table:

UPDATE Customers SET Customers.TotalFreight =
DSum("Freight","Orders","CustomerID='" & [CustomerID] & "'");

--
Duane Hookom
Microsoft Access MVP


"mccoy" wrote:

anyone who can give me a sample database using update query

i want to update all records using calculated field from another table a sum
of TableA.fieldA to my TableB.fieldB

tnx for the response!

i am trying to update all records from a link table if my way of updating
data is wrong can u give me advice how to do it the right way please...

again tnx..

"Duane Hookom" wrote:

It seems you are attempting to store a value that may change and can be
derived by a calculation. If so, this is generally considered poor practice.
However assuming in Northwind.mdb you want to total each customers Freight
from all Orders and store it in a new field (TotalFreight) in the Customers
table:

UPDATE Customers SET Customers.TotalFreight =
DSum("Freight","Orders","CustomerID='" & [CustomerID] & "'");

--
Duane Hookom
Microsoft Access MVP


"mccoy" wrote:

anyone who can give me a sample database using update query

i want to update all records using calculated field from another table a sum
of TableA.fieldA to my TableB.fieldB

I am not aware of why you are attempting to do what you asked. I made some
assumptions and you didn't seem to confirm or deny my assumption. I gave you
an answer/suggestion. Did it work?
--
Duane Hookom
Microsoft Access MVP


"mccoy" wrote:

tnx for the response!

i am trying to update all records from a link table if my way of updating
data is wrong can u give me advice how to do it the right way please...

again tnx..

"Duane Hookom" wrote:

It seems you are attempting to store a value that may change and can be
derived by a calculation. If so, this is generally considered poor practice.
However assuming in Northwind.mdb you want to total each customers Freight
from all Orders and store it in a new field (TotalFreight) in the Customers
table:

UPDATE Customers SET Customers.TotalFreight =
DSum("Freight","Orders","CustomerID='" & [CustomerID] & "'");

--
Duane Hookom
Microsoft Access MVP


"mccoy" wrote:

anyone who can give me a sample database using update query

i want to update all records using calculated field from another table a sum
of TableA.fieldA to my TableB.fieldB