inner join 数据重复

inner join不会导致数据重复。在使用inner join时，只会返回那些在两个表中都存在匹配的行。如果在一个表中有多个匹配的行，则返回的结果集中也会有多个重复的行。但是，这并不是inner join导致的数据重复，而是每个匹配的行都会分别出现在结果集中。因此，可以通过在查询中添加合适的条件来去除重复的行，比如使用distinct关键字或者group by子句进行分组。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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