Oracle SQL-组和详细信息记录

我正在尝试构建一个Oracle SQL查询，当计数大于1时，它将为我提供按行分组的查询以及组成组的行。请参见下面的示例和进行分组的SQL查询。如有任何帮助或建议，将不胜感激

例如，使用以下数据集-

======================
 ID | NAME |  AUTHOR
======================
 2  | Abc  | John 
 6  | Abc  | John 
 3  | Xyz  | Mike 
 4  | Abc  | Mike 
 5  | Xyz  | John 
 1  | Abc  | Mike 
 7  | PQR  | Raj 


Expected Result - 
===========================
ID | NAME | AUTHOR | COUNT
===========================
   | Abc  |        |  4
2  | Abc  |  John  |    
6  | Abc  |  John  |    
4  | Abc  |  Mike  |    
1  | Abc  |  Mike  |    
   | PQR  |        |  1
   | Xyz  |        |  2
3  | Xyz  |  Mike  |    
5  | Xyz  |  John  |    


SELECT  NAME, COUNT(NAME) from (
SELECT 2 as ID, ' Abc  ' as NAME, ' John ' as AUTHOR FROM DUAL
UNION 
SELECT 6 as ID, ' Abc  ' as NAME, ' John ' as AUTHOR FROM DUAL
UNION
SELECT 3 as ID, ' Xyz  ' as NAME, ' Mike ' as AUTHOR FROM DUAL
UNION
SELECT 4 as ID, ' Abc  ' as NAME, ' Mike ' as AUTHOR FROM DUAL
UNION
SELECT 5 as ID, ' Xyz  ' as NAME, ' John ' as AUTHOR FROM DUAL
UNION
SELECT 1 as ID, ' Abc  ' as NAME, ' Mike ' as AUTHOR FROM DUAL
UNION
SELECT 7 as ID, ' PQR  ' as NAME, ' Raj ' as AUTHOR FROM DUAL)
GROUP BY NAME
ORDER by NAME;

---

按姓名和作者计数分组的数据：

SELECT NULL id, name, NULL author, count(author) "count"
FROM myTable
GROUP BY name

当有多个作者时，再加上详细信息：

SELECT id, name, author, NULL "count"
FROM mytable
WHERE name NOT IN (SELECT name FROM myTable GROUP BY name HAVING count(1) = 1)

把它们放在一起，稍微整理一下，得到想要的结果

SELECT id, name, author, NULL "count"
FROM mytable
WHERE name NOT IN (SELECT name FROM myTable GROUP BY name HAVING count(1) = 1)
UNION ALL
SELECT NULL id, name, NULL author, count(author) "count"
FROM myTable
GROUP BY name
ORDER BY 2, 4, 1, 3

---

对不起，我不明白。为什么要从一个包含字段的表中选择固定数据（如ID为2，名称为abc等）？为什么是工会？返回不同名称和计数的查询很容易完成，我可以帮助您完成这一点，但其余的我不理解。请澄清。您正在进行多个表格扫描，因此我确信这是最佳选择。

SELECT id, name, author, NULL "count"
FROM mytable
WHERE name NOT IN (SELECT name FROM myTable GROUP BY name HAVING count(1) = 1)

SELECT id, name, author, NULL "count"
FROM mytable
WHERE name NOT IN (SELECT name FROM myTable GROUP BY name HAVING count(1) = 1)
UNION ALL
SELECT NULL id, name, NULL author, count(author) "count"
FROM myTable
GROUP BY name
ORDER BY 2, 4, 1, 3