oracle order by 和where

在Oracle中，"order by"和"where"都是用于查询和排序数据的SQL语句子句。

"where"子句用于过滤出符合指定条件的数据。它在查询之前应用，并根据指定的条件从表中选择满足条件的记录。例如，"where deptno = 30"将只返回部门编号为30的记录。<em>1</em><em>2</em><em>3</em>
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