MySQL - 哪里还是？

Question

我有一个MySQL语句,我试图排除语句取决于它们"属于"的位置查询通过,但它仍然显示我特别说的行不等于？

SELECT id, belongsto, title, madeby, sticky, locked, lastpost, posts
FROM threads
WHERE sticky !=1
AND belongsto !=12 OR sticky !=1 AND belongsto !=13
ORDER BY  `threads`.`date` DESC 
LIMIT 20

Answer 1

您需要在OR语句周围使用括号,将它们逻辑分组.

WHERE sticky !=1
AND belongsto !=12 OR sticky !=1 AND belongsto !=13

应该:

WHERE (sticky !=1 AND belongsto !=12)
OR (sticky !=1 AND belongsto !=13)

或者更好的是:

 WHERE sticky !=1 AND belongsto NOT IN(12,13)