目录1.自连接2.递归！向上递归向下递归总结你有没有遇到过这样一种情况： 一张表就实现了一对多的关系，并且表中每一行数据都存在“爷爷-父亲-儿子-…”的联系，这也就是所谓的树形结构
I\'m trying to make sense on the best way to do automatize a series of things in a row in order to deploy a web-app and haven\'t yet came up with a s开发者_开发问答uitable solution. I would like to:
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