Update MySQL.md

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docs/database/MySQL.md docs/database/MySQL.md +6 -6

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--- a/docs/database/MySQL.md
+++ b/docs/database/MySQL.md
@@ -245,12 +245,12 @@ SQL 标准定义了四个隔离级别：
 ---
-|     隔离级别     | 脏读 | 不可重复读 | 幻影读 |
+|     隔离级别     | 脏读 | 不可重复读 | 幻读 |
-| :--------------: | :--: | :--------: | :----: |
+| :--------------: | :--: | :--------: | :--: |
-| READ-UNCOMMITTED |  √   |     √      |   √    |
+| READ-UNCOMMITTED |  √   |     √      |  √   |
-|  READ-COMMITTED  |  ×   |     √      |   √    |
+|  READ-COMMITTED  |  ×   |     √      |  √   |
-| REPEATABLE-READ  |  ×   |     ×      |   √    |
+| REPEATABLE-READ  |  ×   |     ×      |  √   |
-|   SERIALIZABLE   |  ×   |     ×      |   ×    |
+|   SERIALIZABLE   |  ×   |     ×      |  ×   |
 ### MySQL 的默认隔离级别是什么?