I am using SSIS to grab the results from 2 Views in a SQL Server database, union them (with appropriate mapping), filter them and place them into an Access database.
This process is working, but the precisions of certain data are changing.
I was already aware of the normal float/real problem of storing approximate values (e.g. SQL Server makes up extra precision for floats?), however the views being referenced by SSIS (“data transfer views”) are selecting from other views (“part level views”, which convert from nvarchars to real/float) which explicitly convert in the following way:
,CONVERT(real,ISNULL(FieldName, 0)) AS Alias
and appear in the data transfer view results to 2 d.p.
The Access column is defined as a Number with Field size=Double, Decimal places=2).
Yet, the float/real approximated value is being displayed in access, rather than the figure to 2 d.p.
The access fields must be Number and not Text, so I can’t recast to nvarchar.
Is there a simple solution to this?
Update: Changing the field size from Double to Single fixes this issue.
Why does the Field size of Double change the precision of the number and why does it not display it according to the specified number of decimal places for a Double?
Check the Access Help topic for DecimalPlaces Property:
“Note The DecimalPlaces property setting has no effect if the Format property is blank or is set to General Number.”
So try modifying the field’s Format property, to see if you can get what you want displayed.