SQL Server Construct a view

I have 2 tables in sql server 2005.
Table A has a field 'main_code' and table B has two fields 'main_code' and 'barcode'. The tables have a relationship on the 'main_code' fields.
I need to construct a view that for each record in B will display the 'barcode' field. In case there is no record from table A associated to table B (in other words the product has no barcode) I want to display the 'main_code' field.
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Anna_RConnect With a Mentor Commented:
select A.main_code, case when B.barcode is null then A.main_code else B.barcode end 'my column'
from A
left join B on (A.main_code=B.main_code)
delimpasisAuthor Commented:
It worked. Thank you
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