[一对一关联](%E4%B8%80%E5%AF%B9%E4%B8%80%E5%85%B3%E8%81%94.md) [一对多关联](%E4%B8%80%E5%AF%B9%E5%A4%9A%E5%85%B3%E8%81%94.md) [远程一对多(跨表关联)](%E8%BF%9C%E7%A8%8B%E4%B8%80%E5%AF%B9%E5%A4%9A%E8%B7%A8%E8%A1%A8%E5%85%B3%E8%81%94.md) [多对多关联](%E5%A4%9A%E5%AF%B9%E5%A4%9A%E5%85%B3%E8%81%94.md) [多态关联](%E5%A4%9A%E6%80%81%E5%85%B3%E8%81%94.md) [关联预载入N+1次查询变2次](%E5%85%B3%E8%81%94%E9%A2%84%E8%BD%BD%E5%85%A5N+1%E6%AC%A1%E6%9F%A5%E8%AF%A2%E5%8F%982%E6%AC%A1.md) [延迟预载入](%E5%BB%B6%E8%BF%9F%E9%A2%84%E8%BD%BD%E5%85%A5.md) [关联统计](%E5%85%B3%E8%81%94%E7%BB%9F%E8%AE%A1.md)