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Original file line number | Diff line number | Diff line change |
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## Database [Back](./../README.md) | ||
* [Optimistic Lock & Pessimistic Lock](./乐观锁与悲观锁/乐观锁与悲观锁.md) | ||
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<a href="http://aleen42.github.io/" target="_blank" ><img src="./../pic/tail.gif"></a> |
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Original file line number | Diff line number | Diff line change |
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## Optimistic Lock & Pessimistic Lock [Back](./../Database.md) | ||
- Optimistic Lock(樂觀鎖): 指的是數據庫樂觀認為你取數據時不會修改數據,因此不會在你讀取數據的時候對關鍵區上鎖. 當你讀取數據後,數據庫會判斷數據是否產生更改. | ||
- Pessimistic Lock(悲觀鎖): 指的是數據庫悲觀認為你取數據時會修改數據,因此會在你讀取數據時對關鍵區上鎖,保證其他用戶讀取數據時不會進入關鍵區讀取錯誤數據. | ||
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<a href="#" style="left:200px;"><img src="./../../pic/gotop.png"></a> | ||
===== | ||
<a href="http://aleen42.github.io/" target="_blank" ><img src="./../../pic/tail.gif"></a> |
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