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May 31, 2022
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Update mysql-questions-01.md #1738

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4 changes: 2 additions & 2 deletions docs/database/mysql/mysql-questions-01.md
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Expand Up @@ -329,8 +329,8 @@ InnoDB 不光支持表级锁(table-level locking)，还支持行级锁(row-level

**表级锁和行级锁对比** ：

- **表级锁：** MySQL 中锁定粒度最大的一种锁，是针对索引字段加的锁，对当前操作的整张表加锁，实现简单，资源消耗也比较少，加锁快，不会出现死锁。其锁定粒度最大，触发锁冲突的概率最高，并发度最低，MyISAM 和 InnoDB 引擎都支持表级锁。
- **行级锁：** MySQL 中锁定粒度最小的一种锁，是针对非索引字段加的锁，只针对当前操作的记录进行加锁。 行级锁能大大减少数据库操作的冲突。其加锁粒度最小，并发度高，但加锁的开销也最大，加锁慢，会出现死锁。
- **表级锁：** MySQL 中锁定粒度最大的一种锁，是针对非索引字段加的锁，对当前操作的整张表加锁，实现简单，资源消耗也比较少，加锁快，不会出现死锁。其锁定粒度最大，触发锁冲突的概率最高，并发度最低，MyISAM 和 InnoDB 引擎都支持表级锁。
- **行级锁：** MySQL 中锁定粒度最小的一种锁，是针对索引字段加的锁，只针对当前操作的记录进行加锁。 行级锁能大大减少数据库操作的冲突。其加锁粒度最小，并发度高，但加锁的开销也最大，加锁慢，会出现死锁。

### 行级锁的使用有什么注意事项？

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