set @sql='select @cost = COUNT(1) from COPTQ'
exec sp_executesql @sql, N'@cost numeric(18,2) out', @cost out
print @cost
set @cost = @cost + 1
print @cost
sp_executesql
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set @sql='select @cost = COUNT(1) from COPTQ'
exec sp_executesql @sql, N'@cost numeric(18,2) out', @cost out
print @cost
set @cost = @cost + 1
print @cost