select shipname,sum(total)from Orders where bogus='No'
and year(Date)='2004' and orderID like 'MN%'
Group by shipname
order by shipName
It gives the following error:
Server: Msg 409, Level 16, State 2, Line 1
The sum or average aggregate operation cannot take a varchar data type as an argument.
The data type of total is varchar, so how can I sum the total?
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