关联sql · PHP知识汇总

![](https://img.kancloud.cn/ea/97/ea978619d943f70db03f41b3ed358005_708x180.png) ![](https://img.kancloud.cn/91/06/91065a31a800dda03d7e3bb41164516c_638x225.png) ![](https://img.kancloud.cn/e4/18/e418c807216387b1995d1e70f9f38a8c_720x181.png) ![](https://img.kancloud.cn/63/77/6377b74c54c610c4a2da7545806a70aa_720x181.png) ![](https://img.kancloud.cn/97/32/97328f42e141f062dcc7757b83a05e17_698x225.png) ![](https://img.kancloud.cn/be/94/be945d61b755e35164ff4c42b629e375_658x228.png) ![](https://img.kancloud.cn/ee/ae/eeaebca4bc4f1e0496155b3d4e0a814f_636x142.png) 列题：可以关联一张表两次 ![](https://img.kancloud.cn/57/b3/57b35f0bc11290e53249d5145998310e_722x131.png) ![](https://img.kancloud.cn/10/aa/10aa3bc622a227bc0d10d723849c5f79_448x222.png)