Question

我有这个：

row  name       company         cusaddr_1
1    Bob        Happy Valley    1 RIVER PARKWAY
2               Happy Valley    1 RIVER PARKWAY
3    Lorie      Pet supply      1 Falls Rd
4    Greg       Pet supply      1 Falls Rd
5               Pet supply      1 Falls Rd
6               A Best Auto     1 camp dr
7    Ron        1 Broadway Ave

我想要的是返回行1,3,4,6,7。基本上，我如何选择公司有名称并且是重复的行，但仍保留第6行的行，其中只有一个公司选项而没有名称？这是Access 2013，我创建了一个像这样的联合查询的表：

select DISTINCT blName as name, company, cusaddr_1
from one_table
union all
select DISTINCT shName as name, company, cusaddr_1
from one_table

Answer 1

我会创建一个带有WHERE子句的查询，检查公司名称空白的行是否有另一个带有名称的记录，如果记录的话，则排除记录：

WHERE (name is NOT NULL) or 
((name IS NULL) AND (company IN 
   (SELECT company FROM one_table GROUP BY company HAVING MAX(name) IS NULL)))

如果您只需要为只有空白名称的公司返回一行，那么我将针对行号创建WHERE子句：

WHERE (name is NOT NULL) or 
((name IS NULL) AND (row In 
(SELECT Min(row) FROM one_table GROUP BY company HAVING MAX(name) Is Null)))

选择下面的行可能具有相同数据的行

1 个答案: