query to eliminate the duplicates records coming from two tables result in sqlserver

Hi All,

I have requirement to eliminate the duplicate records that comes out by using below query:

The query is as follows:

select distinct ColumnA,convert(varchar(max) ,ColumnB )as ColumnB1 from TableA
unionall
select distinct ColumnA,convert(varchar(max) ,ColumnB )as ColumnB1 FROM TableB

Can anyone help me on this?

Regards

sudha