how to Handle NULLS in MsAccess

[skurra]

Hi,



I have below table in SQL Server which i have linked to MS Access 2010.

Create table test
(
col1 int not null
col2 int not null
)

Insert into Test values (1,2)
Insert into Test values (1,'')

Now when i link the table to access database and open up the table i dont have any issues with that. I tried to copy the test table data from access table and paste it to another access table which is linked to sql server with same schema structure thats when it says "You tried to assign the NULL value to a variable that is not a variant data type"

Its treating the blanks as NULLS when copy/paste the records from one table in access to another .. how do i fix that ?

Thanks in Advance

[June7]

Sounds like an SQLServer issue. SQLServer does not like Null? What is an empty field in SQLServer?

Maybe an INSERT SELECT query to add records to the SQLServer table. Use Nz() function to handle possible Null.

[skurra]

Sorry to ask this dumb question , where exactly should i use the NZ() function in access as it is a linked table to SQL Server.. I have read about NULL To zero function but didnt know where exaclty should i use it.. Is it under validation rule ?

Thanks in advance

[June7]

You said you are doing copy/paste to insert records into SQLServer table.

Try building a query and do the copy/paste from the query to SQLServer table.

The query can have an expression using Nz() that will convert Null to whatever you want.

SELECT Nz(fieldname, 0) AS SomeAliasName FROM tablename;

[skurra]

Let me explain you in more detail..

There are two tables created in SQL Server Table1 & Table2 with exact same schema. Both of them are linked to access database .
One of the table has been populated with data out of which one of the column is mandatory column so they have few blanks in the data in sql server.
Now when the user open the table from access db they can view the data. Now the users are trying to copy the data from access.table1 and paste it into access.table2 as they wouldnt have access to sql server, that when they are getting the above error as access is treating those blanks as nulls and returning an error

[June7]

If the destination field is required, then that might cause issue, regardless of the nature of table (native Access or linked).

I think the error is really triggered by SQLServer. If SQLServer is not allowing the Nulls then cannot do copy/paste from raw data. Try it from a query as suggested.

Why are users working directly with tables anyway?

Why are there two tables with same data?