[介绍](mysql%E9%94%81%E6%9C%BA%E5%88%B6/%E4%BB%8B%E7%BB%8D.md) [演示](%E6%BC%94%E7%A4%BA.md) [总结](%E6%80%BB%E7%BB%93.md) [乐观锁和悲观锁](%E4%B9%90%E8%A7%82%E9%94%81%E5%92%8C%E6%82%B2%E8%A7%82%E9%94%81.md)