问题
I have a query with 4 calculated fields , one of them calculate the running sum using DSum
When running this query and go to the last record it is taking some time (that is normal and OK)
But the problem is that MS Access recalculate this field every time I scroll up or down using mouse wheel, and this recalculation taking a very long time that make this query unusable
I think MS Access do this recalculation because it is multi user application so I change it to Exclusive (File > Options > Client Settings > Advanced > Default open mode > Exclusive) , but this not help
So Im looking for something like Excel to disable automatic calculation and calculate what you need and when you need using VBA for MS Access or at least prevent MS Access from recalculate the query every time I scroll up or down.
- no more than one user will use my database at the same time
- the query has about 40,000 records
回答1:
As Nick wrote, you can't.
To view the data without recalculation, put it into a report, or use a INSERT INTO or SELECT INTO action query to save it to a temporary table. The latter is especially useful, if you want to do further calculations on the data, or if it is the recordsource of another query.
来源：https://stackoverflow.com/questions/33885520/how-to-disable-automatic-calculation-in-ms-access