Hi. I've got the following SQL table:
CREATE TABLE [dbo].[Test](
[TestID] [int] NOT NULL,
[TestNum] [int] NULL,
[TestReason] [varchar](50) NULL
)
So TestNum an INT which allows NULL values, and I've inserted a whole lot of data into the table, of which some of the rows contain a NULL value for TestNum
If I then run the following query
select *
from Test
where TestNum != 123
The query aboe doesn't return any rows that have a NULL value. I would expect it to return ALL rows EXCEPT those that have the value 123.
Why is this?
I am running this query on a MS-SQL 2000 DB, imported into MS SQL 2005. Does this have any effect? Or is this behaviour standard for all versions of MS SQL Server?