querywrapper去重查询
时间: 2023-08-26 09:04:40 浏览: 173
在使用QueryWrapper进行去重查询时,可以使用select("DISTINCT 字段名")方法来去除重复的结果。例如,可以通过qw.select("DISTINCT receive_batch")来实现在查询语句中加入DISTINCT关键字,对receive_batch字段进行去重查询。另外,还可以结合in方法实现多条件的去重查询。通过创建一个QueryWrapper对象,并使用qw.in(R column, Collection<?> coll)来指定要进行in查询的字段和查询条件的集合。最后,调用相应的查询方法,如employeeService.list(qw),来执行查询操作并返回去重后的结果集。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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