Question

我正在尝试查询地址表，以检查每个所有者是否重复了ID。

我的基本查询显示了与媒体相关的地址媒体和所有者。

owner_obj_id   addr_medium_id  is_std_addr
12345          5001            +
12345          5002            +
12345          5001            null
12346          5001            null

我想查询每个不同的owner_obj_id并检查它们是否具有重复的介质ID，例如，它们不应该有5001两次。

Answer 1

要获得重复组合，您可以执行

select owner_obj_id, addr_medium_id
from tablename
group by owner_obj_id, addr_medium_id
having count(*) > 1

编辑：

select owner_obj_id, addr_medium_id
from tablename
where is_std_addr is not null
group by owner_obj_id, addr_medium_id
having count(*) > 1

Answer 2

试试这个。使用before(:each) do @school = build(:school) @teacher = build(:teacher) build_list(:mock_with_proccessed_statistics, 2, school: @school, teacher: @teacher) @mocks = Mock.page(nil) @q = Mock.ransack allow(view).to receive(:current_school).and_return(@school) allow(view).to receive(:format_date) { |date, format| date.strftime(format) } end汇总+ Count声明

Case

Answer 3

如果您希望拥有多个地址的所有者：

select owner_obj_id
from tablename
group by owner_obj_id
having min(addr_medium_id) <> max(addr_medium_id);

如果您想要原始行，可以使用join或使用窗口函数执行类似的操作。也许最简单的只是in：

select t.*
from tablename t
where t.owner_obj_id in (select owner_obj_id
                         from tablename
                         group by owner_obj_id
                         having min(addr_medium_id) <> max(addr_medium_id)
                        );

计数重复的类ids plsql

3 个答案: