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2018-11-24 11:12:37 +08:00
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notes/数据库系统原理.md
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@ -221,8 +221,8 @@ MySQL 中提供了两种封锁粒度：行级锁以及表级锁。
| unlock-x(A) |. |
| | obtain |
| | read A=20 |
| | commit |
| | unlock-s(A)|
| | commit |
**三级封锁协议**