我有一个Z表字段A想找出A的所有重复的项，目前实验了两种方法均为SQL错误
1.使用按属性选择工具"A" in (select "A" from Z group by "A" having count("A") >1)
2.在Z层属性里定义查询 "A" in (select "A" from Z group by "A" having count("A") >1)
目前研究shp格式不支持子查询 有什么别的方法可以找出重复的项
1.使用按属性选择工具"A" in (select "A" from Z group by "A" having count("A") >1)
2.在Z层属性里定义查询 "A" in (select "A" from Z group by "A" having count("A") >1)
目前研究shp格式不支持子查询 有什么别的方法可以找出重复的项
