摘要:
https://www.zhihu.com/question/51513268?sort=created IX,IS是表级锁,不会和行级的X,S锁发生冲突。只会和表级的X,S发生冲突。 意向锁是一种快速判断表锁与之前可能存在的行锁冲突的机制。 1.在mysql中有表锁 LOCK TABLE my_t 阅读全文
摘要:
https://leetcode.wang/leetCode-40-Combination-Sum-II.html 描述 Given a collection of candidate numbers (candidates) and a target number (target), find a 阅读全文
摘要:
https://leetcode.wang/leetCode-39-Combination-Sum.html 描述 Given a set of candidate numbers (candidates) (without duplicates) and a target number (targ 阅读全文