Oracle 10g - sql 查询 [关闭]

Question

我有一个名为 books 的表

BookID  Title  Publisher_Name Publisher_Address No_of_Copies

select Publisher_Name from books where Title like '%C%', 

会给我所有包含字母 C 的书（在这种情况下是 C 编程，如 ANSI C、Let Us C 等...）

但是如何解决这个问题：

列出已出版最多 c 编程书籍的出版商？和

列出出版书籍数量较少的出版商

Answer 1

试试这个：

问题 1。

SELECT Publisher_Name, SUM(No_of_Copies) No_of_Copies
FROM books 
WHERE Title LIKE '%C%'
GROUP BY Publisher_Name
ORDER BY No_of_Copies DESC

问题 2：

如果要列出出版C语言书籍数量较少的出版商

SELECT Publisher_Name, SUM(No_of_Copies) No_of_Copies
FROM books 
WHERE Title LIKE '%C%'
GROUP BY Publisher_Name
ORDER BY No_of_Copies

一般情况下

SELECT Publisher_Name, SUM(No_of_Copies) No_of_Copies
FROM books 
GROUP BY Publisher_Name
ORDER BY No_of_Copies

编辑:::

SELECT Publisher_Name, SUM(No_of_Copies) No_of_Copies
FROM books 
WHERE Title LIKE '%C%'
GROUP BY Publisher_Name
ORDER BY No_of_Copies DESC LIMIT 1

或

SELECT Publisher_Name, MAX(No_of_Copies) No_of_Copies
FROM (SELECT Publisher_Name, SUM(No_of_Copies) No_of_Copies
      FROM books 
      WHERE Title LIKE '%C%'
      GROUP BY Publisher_Name
      ORDER BY noOfBooks DESC
     ) AS A