摘要:
Coding HardlyIt is hard to describe how difficultly in program coding. At first, sales signed the contract with customer without technical support on the spot. So, what the content write on the contract is unknown to developers. Second, the time for developing is unique; commonly 6 month term is red 阅读全文
摘要:
此解法来自博客园思想瞭望者开设之“sql精英群”对话。iceline(43417365) 11:36:59 现在PATH的上下级关系是对了,我如何更新parentIDthanks(305380844) 12:54:12 做出来了,试试update test set parentid = b.parentidbfrom test ,(select a.id, a.parentid, a.path , b.id as parentidb, b.path as bpathfrom test a cross join test bwhere len(REPLACE(a.path, b.path, 阅读全文