Merge pull request Snailclimb#354 from lijunn/master

Update 事务隔离级别(图文详解).md

Author: Snailclimb

docs/database/事务隔离级别(图文详解).md

@@ -69,7 +69,7 @@
 | REPEATABLE-READ | × | × | √ |
 | SERIALIZABLE | × | × | × |
 
-MySQL InnoDB 存储引擎的默认支持的隔离级别是 **REPEATABLE-READ（可重读）**。我们可以通过`SELECT @@tx_isolation;`命令来查看
+MySQL InnoDB 存储引擎的默认支持的隔离级别是 **REPEATABLE-READ（可重读）**。我们可以通过`SELECT @@tx_isolation;`命令来查看,MySQL 8.0 该命令改为`SELECT @@transaction_isolation;`
 
 ```sql
 mysql> SELECT @@tx_isolation;