拥有超过 2 本书

Question

我必须只打印出出版超过 2 本书的出版商，但对于我的结果，我总是得到

PUB_NAME            |TOTAL      
--------------------------------
Abatis Publishers   |4          
Core Dump Books     |1     <------don't want to print     
Schadenfreude Press |3          
Tenterhooks Press   |5

ERROR 42X01: Syntax error: Encountered "HAVING"

到目前为止，这是我的代码。

SELECT pub_name, COUNT(title_name) AS total
FROM publishers 
INNER JOIN titles
ON titles.pub_id = publishers.pub_id
GROUP BY pub_name;
HAVING total > 2;

Answer 1

只需使用 WHERE

SELECT p.pub_name, COUNT(t.title_name) AS total
FROM publishers p
INNER JOIN titles t ON t.pub_id = p.pub_id
WHERE COUNT(t.title_name) > 2
GROUP BY p.pub_name;

Answer 2

总计无法在 HAVING 中识别。尝试 HAVING COUNT(title_name) > 2;

同时删除“;”在 GROUP BY pub_name;

中

拥有超过 2 本书

HAVING more than 2 books

sql

having

having-clause