问题:假如知道某一厂商生产的一个产品 ID 为 DTNTR有问题,需要从数据库中查找出该厂商生产的其他所有产品。
下面的SELECT语句可以将该vend_id所生产的所有产品查找出来:
现在来看使用联结的相同查询:
Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn