我这样写可以吗?
select * from sales
where ord_date > '1993-01-01' and '1994-01-01'
order by title_id desc
这样可以啊
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select * from Sales where ord_date between '1993-01-01' and '1994-01-01' order by title_id desc
select * from sales where ord_date > '1993-01-01' and '1994-01-01' order by title_id desc 这两种都比我那种好,如果在ord_date建索引的话这两种方法都能使用索引,而我那种却会导致全表扫描